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WAL_Midea_MSE_21_28_SM_Eng _1_

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					GD Midea Refrigeration Equipment Co.,Ltd

SPLIT TYPE, HEAT PUMP AIR CONDITIONERS




Technical & service manual 2005

Elite Series                R22 Wall Mounted

[Models]

           MSE-21CR

           MSE-21HR

           MSE-24CR

           MSE-24HR

           MSE-28CR

           MSE-28HR
Elite SERIES (R22)
Contents

1. Features………………………………………………………………… 02

2. Specification………………………………………………………..……03

3. Dimensions…………………………………………………………..… 05

4. Refrigeration cycle diagram……………………………………………07

5. Capacity table…………………………………………………………...08

6. Wiring diagram…………………………………………………..………13

7. Troubleshooting………………………………….………….…………..17

8. Electronic function…………………………………………………… .23

9. Characteristic of temp. sensor…………………………………………29




                            1
1.Features
1.1 Compact design
1.2 LED display




                     2
2.Specification
                        Model                               MSE-21CR             MSE-21HR             MSE-24CR              MSE-24HR

Power supply                              Ph-V-Hz        220-240V~,50HZ       220-240V~,50HZ       220-240V~,50HZ 1, 220-240V~, 50Hz
                   Capacity                Btu/h              21000                21000                24000            24000
                   Input                     W                2350                  2350                2800              2800
Cooling
                   Rated current             A                 10.7                 10.7                 12.5             12.5
                   EER                  Btu/w.h, w/w         8.9, 2.6             8.9, 2.6             8.6, 2.5         8.6, 2.5
                   Capacity                Btu/h                                   25000                                 27000
                   Input                     W                                      2400                                  2800
Heating
                   Rated current             A                                       11                                   12.5
                   COP                      W/W                                      3.0                                   2.8
Moisture Removal                            L/h                 2.2                  2.2                  2.3              2.3
Max. input consumption                       W                 2900                 2900                2900              2900
Max. current                                 A                  15                   15                   15               15
Starting current                             A                  66                   66                   66               66

                   Model                                PH420X3CS-4KU1 PH420X3CS-4KU1 PH420X3CS-4KU1 PH420X3CS-4KU1
                    Type                                 Rotary              Rotary             Rotary             Rotary
                    Brand                               TOSHIBA             TOSHIBA            TOSHIBA            TOSHIBA
                    Capacity                Btu/h         24990              24990              24990              24990
Compressor          Input                     W            2430               2430               2430               2430
                    Rated current(RLA)        A            11.3               11.3               11.3               11.3
                    Locked rotor Amp(LRA) A               61/66               61/66              61/66              61/66
                    Thermal protector             UP14RE5245(Internal)                   UP14RE5245(Internal)
                                                                      UP14RE5245(Internal)                  UP14RE5245(Internal)
                    Capacitor                 uF            50                 50                 50                 50
                    Refrigerant oil           ml   SUNISO 4GSD 950SUNISO 4GSD 950SUNISO 4GSD 950SUNISO 4GSD 950
                    Model                              YDK36-4C            YDK36-4C           YDK36-4C           YDK36-4C
                    Brand                                Welling             Welling            Welling            Welling
Indoor fan motor Input                        W         65/64/62            65/64/62           65/64/62           65/64/62
                    Capacitor                 uF       2μF/450V            2μF/450V           2μF/450V           2μF/450V
                    Speed(hi/mi/lo)         r/min 1200/1120/1080/1000 1200/1120/1080/10001200/1120/1080/10001200/1120/1080/1000
Indoor air flow (Hi/Mi/Lo)                  m3/h    1080/1020/960/880 1080/1020/960/880 1080/1020/960/880 1080/1020/960/880
Indoor noise level (Hi/Mi/Lo)               dB(A)       45/42/39            45/42/39           45/42/39           45/42/39
                    Dimension (W*H*D)        mm      1080×330×225        1080×330×225       1080×330×225       1080×330×225
Indoor unit         Packing (W*H*D)          mm      1165X445X320        1165X445X320       1165X445X320       1165X445X320
                    Net/Gross weight          Kg          17/22               17/22              17/22              17/22
                    Model                              YDK53-6D            YDK53-6D           YDK53-6D           YDK53-6D
                    Brand                                Welling             Welling            Welling            Welling
Outdoor fan motor Input                       W             140                140                140                140
                    Capacitor                 uF
                    Speed                   r/min           800                800                800                800
Outdoor air flow                            m3/h           2500               2500               2500               2500
Outdoor noise level                         dB(A)            55                 55                 55                 55
                    Dimension(W*H*D)         mm       845X695X335         845X695X335        845X695X335        845X695X335
Outdoor unit        Packing (W*H*D)          mm       970X770X395         970X770X395        970X770X395        970X770X395
                    Net/Gross weight          Kg          58/63               60/65              58/63              60/65
Refrigerant type R22(R407C)                    g        R22/1450            R22/1900           R22/1450           R22/1900
Design pressure                             MPa             2.6                2.6                2.6                2.6
                    Liquid side/ Gas sidemm(inch)     Ф9.53/Ф16.0         Ф9.53/Ф16.0        Ф9.53/Ф16.0        Ф9.53/Ф16.0
Refrigerant piping Max. refrigerant pipe length
                                              m             20                 20                 20                 20
                    Max. difference in level m              10                 10                 10                 10
Connection wiring                                           No                 No                 No                 No
Plug type                                                   No                 No                 No                 No
Thermostat type                                     Electronic control Electronic control Electronic control Electronic control
Operation temp                                ℃           17-30              17-30              17-30              17-30
Ambient temp                                  ℃           18-45              -7 - 45            18-45              -7 - 45
Application area                             m2           34~49              34~49              34~49              34~49
Qty’per 20’ /40’ /40'HQ                      set       60/132/142          60/132/142         60/132/142         60/132/142

★1 The noise date is base on hemi-anechoic chamber, during actual operation, these values are normally somewhat different as a result of ambient

condition.



                                                                       3
                        Model                               MSE-28CR             MSE-28HR

Power supply                              Ph-V-Hz        220-240V~,50HZ       220-240V~,50HZ
                    Capacity               Btu/h              28000                28000
                    Input                    W                3200                  3200
Cooling
                    Rated current            A                 15.0                 15.0
                    EER                 Btu/w.h, w/w         8.7, 2.5             8.7, 2.5
                    Capacity               Btu/h                                   31000
                    Input                    W                                      3200
Heating
                    Rated current            A                                      15.0
                    COP                     W/W                                      2.8
Moisture Removal                            L/h                 2.8                  2.8
Max. input consumption                       W                 3800                 3800
Max. current                                 A                 20.0                 20.0
Starting current                             A                  100                 100

                    Model                                ZR34KH-PFJ-522       ZR34KH-PFJ-522
                    Type                                        Scroll              Scroll
                    Brand                                     Copeland            Copeland
                    Capacity                Btu/h               28000              28000
Compressor          Input                     W                  2520               2520
                    Rated current(RLA)        A                  13.5               13.5
                    Locked rotor Amp(LRA) A                    90/100              90/100
                    Thermal protector                   15HM1766(Internal)15HM1766(Internal)
                    Capacitor                 uF                  50                 50
                    Refrigerant oil           ml                 1242               1242
                    Model                                    YDK36-4C            YDK36-4C
                    Brand                                      Welling             Welling
Indoor fan motor Input                        W               70/66/63            70/66/63
                    Capacitor                 uF             3μF/450V            3μF/450V
                    Speed(hi/mi/lo)         r/min      1250/1180/1110/1050  1250/1180/1110/1050
Indoor air flow (Hi/Mi/Lo)                  m3/h         1150/1080/1020/960 1150/1080/1020/960
Indoor noise level (Hi/Mi/Lo)               dB(A)             47/44/41            47/44/41
                    Dimension (W*H*D)        mm            1080×330×225        1080×330×225
Indoor unit         Packing (W*H*D)          mm            1165X445X320        1165X445X320
                    Net/Gross weight          Kg                17/22               17/22
                    Model                                    YDK53-6D            YDK53-6D
                    Brand                                      Welling             Welling
Outdoor fan motor Input                       W                   169                169
                    Capacitor                 uF                   5                  5
                    Speed                   r/min                 800                800
Outdoor air flow                            m3/h                 2500               2500
Outdoor noise level                         dB(A)                 57                 57
                    Dimension(W*H*D)         mm             845X695X335         845X695X335
Outdoor unit        Packing (W*H*D)          mm             970X770X395         970X770X395
                    Net/Gross weight          Kg                67/72               69/74
Refrigerant type R22(R407C)                    g              R22/1900            R22/1950
Design pressure                             MPa                   2.6                2.6
                    Liquid side/ Gas sidemm(inch)           Ф9.53/Ф16.0         Ф9.53/Ф16.0
Refrigerant piping Max. refrigerant pipe length
                                              m                   20                 20
                    Max. difference in level m                    10                 10
Connection wiring                                                 No                 No
Plug type                                                         No                 No
Thermostat type                                           Electronic control Electronic control
Operation temp                                ℃                 17-30              17-30
Ambient temp                                  ℃                 18-45              -7 - 45
Application area                             m2                 50~68              50~68
Qty’per 20’ /40’ /40'HQ                      set             60/132/142          60/132/142

★1 The noise date is base on hemi-anechoic chamber, during actual operation, these values are normally somewhat different as a result of ambient

condition.




                                                                       4
3.Dimensions
3.1 Indoor unit

MSE-21CR, MSE-21HR
MSE-24CR, MSE-24HR
MSE-28CR, MSE-28HR




                     5
3.2 Outdoor unit

MSE-21CR, MSE-21HR
MSE-24CR, MSE-24HR
MSE-28CR, MSE-28HR




                     12.5




                            6
4.Refrigeration cycle diagram




                                7
5. Capacity table
5.1 MSE-21CR

SUMMER                                             OUTDOOR TEMPERATURE DRY
  Indoor
                                     25ºC   30ºC        35ºC     40ºC    45ºC       50ºC
Conditions
             Total capacity kW       5.44   5.16        4.81     4.42        4.06   3.79
 21ºC D
             Sensitive capacity kW   3.80   3.69        3.53     3.34        3.18   3.04
 15ºC W
             Input kW.               1.97   2.13        2.31     2.48        2.64   2.8188
             Total capacity kW       5.83   5.58        5.25     4.93        4.61   4.33
 24ºC D
             Sensitive capacity kW   3.47   3.37        3.25     3.13        3.04   3.00
 17ºC W
             Input kW.               1.97   2.16        2.34     2.52        2.70   2.90
             Total capacity kW       6.24   6.12        5.80     5.35        4.87   4.44
 27ºC D
             Sensitive capacity kW   4.37   4.28        4.12     3.92        3.71   3.55
 19ºC W
             Input kW.               2.01   2.20        2.38     2.58        2.76   2.95
             Total capacity kW       6.59   6.46        6.37     6.15        5.87   5.58
 32ºC D
             Sensitive capacity kW   4.14   4.19        4.15     4.08        4.04   4.06
 23ºC W
             Input kW.               2.00   2.22        2.44     2.66        2.88   3.10


5.2 MSE-21HR

SUMMER                                             OUTDOOR TEMPERATURE DRY
  Indoor
                                     25ºC   30ºC        35ºC     40ºC    45ºC       50ºC
Conditions
              Total capacity kW      5.44   5.16        4.81     4.42        4.06   3.79
 21ºC D
             Sensitive capacity kW   3.80   3.69        3.53     3.34        3.18   3.04
 15ºC W
                  Input kW.          1.97   2.13        2.31     2.48        2.64   2.8188
              Total capacity kW      5.83   5.58        5.25     4.93        4.61   4.33
 24ºC D
             Sensitive capacity kW   3.47   3.37        3.25     3.13        3.04   3.00
 17ºC W
                  Input kW.          1.97   2.16        2.34     2.52        2.70   2.90
              Total capacity kW      6.24   6.12        5.80     5.35        4.87   4.44
 27ºC D
             Sensitive capacity kW   4.37   4.28        4.12     3.92        3.71   3.55
 19ºC W
                  Input kW.          2.01   2.20        2.38     2.58        2.76   2.95
              Total capacity kW      6.59   6.46        6.37     6.15        5.87   5.58
 32ºC D
             Sensitive capacity kW   4.14   4.19        4.15     4.08        4.04   4.06
 23ºC W
                  Input kW.          2.00   2.22        2.44     2.66        2.88   3.10




                                              8
WINTER                                                 OUTDOOR CONDITIONS
  Indoor                             12ºC D   7ºC D       4ºC D   0ºC D     -4ºC D    -7ºC D
Conditions                           11ºC W   6ºC W       3ºC W   -1ºC W    -6ºC W    -8ºC W
                 Capacity kW          8.30    7.38        6.53     4.22        3.53    3.40
  15ºC
                   Input kW.          2.94    2.63        2.35     2.03        1.88    1.74
                 Capacity kW          7.82    7.01        6.32     4.02        3.71    3.34
  18ºC
                   Input kW.          3.01    2.63        2.39     2.14        2.00    1.78
                 Capacity kW          7.78    7.08        6.26     3.82        3.43    3.35
  20ºC
                   Input kW.          3.08    2.70        2.45     2.15        2.04    1.81
                 Capacity kW          7.22    6.89        5.98     3.24        3.46    3.30
  22ºC
                   Input kW.          3.10    2.70        2.46     2.15        2.05    1.84




5.3 MSE-24CR

SUMMER                                               OUTDOOR TEMPERATURE DRY
  Indoor
                                     25ºC     30ºC        35ºC     40ºC     45ºC      50ºC
Conditions
              Total capacity kW       6.57    6.25        5.81     5.34        4.90    4.57
 21ºC D
             Sensitive capacity kW    4.61    4.47        4.28     4.06        3.85    3.69
 15ºC W
                  Input kW.           2.30    2.50        2.71     2.95        3.13    3.35
              Total capacity kW       7.04    6.73        6.35     5.94        5.55    5.22
 24ºC D
             Sensitive capacity kW    4.89    4.75        4.58     4.41        4.28    4.23
 17ºC W
                  Input kW.           2.30    2.52        2.75     2.98        3.21    3.44
              Total capacity kW       7.54    7.40        7.00     6.45        5.87    5.37
 27ºC D
             Sensitive capacity kW    5.30    5.19        5.12     4.75        4.51    4.30
 19ºC W
                  Input kW.           2.34    2.58        2.80     3.05        3.29    3.52
              Total capacity kW       7.98    7.80        7.69     7.42        7.08    6.73
 32ºC D
             Sensitive capacity kW    5.24    5.09        5.04     4.96        4.90    4.92
 23ºC W
                  Input kW.           2.41    2.59        2.87     3.15        3.42    3.70




                                                9
5.4 MSE-24HR

SUMMER                                               OUTDOOR TEMPERATURE DRY
  Indoor
                                     25ºC     30ºC        35ºC     40ºC     45ºC      50ºC
Conditions
              Total capacity kW       6.57    6.25        5.81     5.34        4.90    4.57
 21ºC D
             Sensitive capacity kW    4.61    4.47        4.28     4.06        3.85    3.69
 15ºC W
                  Input kW.           2.30    2.50        2.71     2.95        3.13    3.35
              Total capacity kW       7.04    6.73        6.35     5.94        5.55    5.22
 24ºC D
             Sensitive capacity kW    4.89    4.75        4.58     4.41        4.28    4.23
 17ºC W
                  Input kW.           2.30    2.52        2.75     2.98        3.21    3.44
              Total capacity kW       7.54    7.40        7.00     6.45        5.87    5.37
 27ºC D
             Sensitive capacity kW    5.30    5.19        5.12     4.75        4.51    4.30
 19ºC W
                  Input kW.           2.34    2.58        2.80     3.05        3.29    3.52
              Total capacity kW       7.98    7.80        7.69     7.42        7.08    6.73
 32ºC D
             Sensitive capacity kW    5.24    5.09        5.04     4.96        4.90    4.92
 23ºC W
                  Input kW.           2.41    2.59        2.87     3.15        3.42    3.70




                   WINTER                              OUTDOOR CONDITIONS
  Indoor                             12ºC D   7ºC D       4ºC D   0ºC D     -4ºC D    -7ºC D
Conditions                           11ºC W   6ºC W       3ºC W   -1ºC W    -6ºC W    -8ºC W
                 Capacity kW          9.26    8.24        7.29     4.71        3.94    3.81
  15ºC
                   Input kW.          3.07    2.71        2.40     2.03        1.86    1.73
                 Capacity kW          8.72    7.82        7.05     4.48        4.13    3.76
  18ºC
                   Input kW.          3.15    2.71        2.45     2.18        2.09    1.77
                 Capacity kW          8.68    7.90        7.00     4.25        3.95    3.74
  20ºC
                   Input kW.          3.25    2.80        2.51     2.18        2.10    1.80
                 Capacity kW          8.07    7.68        6.67     3.61        3.86    3.68
  22ºC
                   Input kW.          3.28    3.00        2.82     2.47        2.26    2.13




                                                10
5.5 MSE-28CR

SUMMER                                             OUTDOOR TEMPERATURE DRY
  Indoor
                                     25ºC   30ºC        35ºC     40ºC    45ºC       50ºC
Conditions
              Total capacity kW      7.77   7.45        7.01     6.54        6.10   5.77
 21ºC D
             Sensitive capacity kW   5.81   5.67        5.48     5.26        5.05   4.89
 15ºC W
                  Input kW.          2.70   2.90        3.11     3.35        3.53   3.75
              Total capacity kW      8.24   7.93        7.55     7.14        6.75   6.42
 24ºC D
             Sensitive capacity kW   6.09   5.95        5.78     5.61        5.48   5.43
 17ºC W
                  Input kW.          2.70   2.92        3.15     3.38        3.61   3.84
              Total capacity kW      8.74   8.60        8.20     7.65        7.07   6.57
 27ºC D
             Sensitive capacity kW   6.50   6.39        6.32     5.95        5.71   5.50
 19ºC W
                  Input kW.          2.74   2.98        3.20     3.45        3.69   3.92
              Total capacity kW      9.18   9.00        8.89     8.62        8.28   7.93
 32ºC D
             Sensitive capacity kW   6.44   6.29        6.24     6.16        6.10   6.12
 23ºC W
                  Input kW.          2.81   2.99        3.27     3.55        3.82   4.10




5.6 MSE-28HR

SUMMER                                             OUTDOOR TEMPERATURE DRY
  Indoor
                                     25ºC   30ºC        35ºC     40ºC    45ºC       50ºC
Conditions
              Total capacity kW      7.77   7.45        7.01     6.54        6.10   5.77
 21ºC D
             Sensitive capacity kW   5.81   5.67        5.48     5.26        5.05   4.89
 15ºC W
                  Input kW.          2.70   2.90        3.11     3.35        3.53   3.75
              Total capacity kW      8.24   7.93        7.55     7.14        6.75   6.42
 24ºC D
             Sensitive capacity kW   6.09   5.95        5.78     5.61        5.48   5.43
 17ºC W
                  Input kW.          2.70   2.92        3.15     3.38        3.61   3.84
              Total capacity kW      8.74   8.60        8.20     7.65        7.07   6.57
 27ºC D
             Sensitive capacity kW   6.50   6.39        6.32     5.95        5.71   5.50
 19ºC W
                  Input kW.          2.74   2.98        3.20     3.45        3.69   3.92
              Total capacity kW      9.18   9.00        8.89     8.62        8.28   7.93
 32ºC D
             Sensitive capacity kW   6.44   6.29        6.24     6.16        6.10   6.12
 23ºC W
                  Input kW.          2.81   2.99        3.27     3.55        3.82   4.10




                                             11
              WINTER                        OUTDOOR CONDITIONS
  Indoor                   12ºC D   7ºC D     4ºC D    0ºC D     -4ºC D   -7ºC D
Conditions                 11ºC W   6ºC W     3ºC W    -1ºC W    -6ºC W   -8ºC W
             Capacity kW   10.46    9.44       8.49     5.91      5.14     5.01
  15ºC
              Input kW.     3.47    3.11       2.80     2.43      2.26     2.13
             Capacity kW    9.92    9.02       8.25     5.68      5.33     4.96
  18ºC
              Input kW.     3.55    3.11       2.85     2.58      2.49     2.17
             Capacity kW    9.88    9.10       8.20     5.45      5.15     4.94
  20ºC
              Input kW.     3.65    3.20       2.91     2.58      2.50     2.20
             Capacity kW    9.27    8.88       7.87     4.81      5.06     4.88
  22ºC
              Input kW.     3.68    3.40       3.22     2.87      2.66     2.53




                                      12
6. Schematic diagram and wiring diagram
6.1 Schematic diagram
                                                                                                                                                     D 1 IN 4 0 0 7* 8                                IC 3     7 80 5                                        +5V
                 +5V                                                                                                                                                                          1                                              3
                                                                                                                                                                                                       V in                 Vout
                                                                                   C3    1 04                                                        D2




                                                                                                                                                                                                              GND
                                                 IC 2 2 4C 04                                                                     5VAC 2                                      E2            C6                                                        E3          C8
          R3                 R4                                                                                        C N1                          D3
          1 0K               1 0K      8                                       1                                                                                                            1 04                                                                  1 04
                                                   VC C   A0                                                                            5VAC 1                                                                                                                                                          FU SE1
                                       7                                       2                                         4                                                                                                                                                                                                 L1
                                                   WC     A1                                                                                         D7                                                                                                                             C N2                                                                                                   C N5




                                                                                                                                                                                                                    2
                                       6                                       3
  SC L                                             SC L   A2                                                                                                                                                                                                                                      L     3 .1 5 A /2 50 V
                                       5                                       4                                         3                                                                                                                                                               2                                  ZR 1                         C 16                                1
  SD A                                             SD A G N D                                                                                        D4              1 00 0 u F/25 V                                                        4 70 u F/1 6V
                                                                                                                                  1 2V A C 2                                                                                                                                                                            1 4D 68 1 K                      0 .1 u F/27 5 V A C
                                                                                                                         2                                                                   +12 V                                                                                       1                                                                                                   2
                                                                                                                                                     D5                                                                                                                                                                                                                        t
                                                                                                                                                                                                                                                                                    PO W ER                                N                                                               TR A N S_IN
                                                                                                                         1                                                   E1            C5
                                                                                                                                                     D6
                  +5V                                                                                   TR A N S_O U T 1 2V A C 1                                                          1 04                                                                                                                                                                          PTC 1
                                    R 7 1 2K                                                                                                                                                                                             +5V                                          +5V
                                                                                                                                                     D8                                                                                                                                                                                                                  8 2R M

            C1               1                                                                                                                                                                                                                R2                                             R1
                                                       3                                                                                                           2 20 0 u F/25 V
           1 04                                                  R ST                                                                                                                                                                         1 0K                                           1 0K
                             2                                                                                                                                                                                                                                                                                                                                   J1                J2                                             +12 V   D9
                                                              C2                        +5V
                                                                                              R5                                                                                                                                                      EEPR O M                                                   M ode l
                                 IC 1 K IA 70 4 2                                                                                                                                                                                                                                                                                                                                                                                                   In _ Fan LL'
                                                              1 04                                                                         SW _ TEST                                                                                                                                                                                               ÎÞ           Àäů           ÎÞµô µç ¼ Ç Ò ä                                                                                           +12 V                       C N6
                                                                                              1 0K          R6                                                                                                                                   J2                                          J1                                                                                                                                        IN 4 1 4 8
                                                                                                                                    C7                                                                                                                                                                                                                                                                                                                                                                                   1
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                                                                                         SW 1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   R Y1                  2
                                                                                                                                                                                                                                                                                                                                                                                                                                                         Q1
                                                                                                                                                                                                                                                                                                                                                                                                                             R 13                        9 01 4                                    LL
                                                                                                                                                                                                                                                                                                                                                                                                            In _ Fan LL                                                                                                  3
   C N7                +5V                                                                                                              +5V                                                                                                                                                                                                                                                                                  2K                                           In _ Fan LL'
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   L1
      2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  4
                                                                                                                                 C 10                                                                                                             R 19                 X1                                                                                       C N9
                             D13                                                                                                                                                            IC 4                                                                                                                                                                                                                                                                                                                 N
      1                                                                                                                          1 04                                                                                                             1M                                                                                                                                                                                                                                                                     5
                             IN 4 1 4 8                                                                                                                                            1                                                   42X1                                                                                                  SEG 4               1
                                                                                                                                                                                              V SS                       X1
  T1_ roo m                                                                                                                                                                        2                                                   41X2                                                                                                  SEG 3               2                                                                                                                                 R Y3              C ON5
                                            R 11       2K                                                                                                                                     VDD                        X2
                                                                                                                                                                 In _ Fan M        3                                                   4 0 R e s et                                                                                          SEG 2               3                                                                                                                                 L
                                                                               T1_ roo m                                                            In _ Fan M                                P25                   R ESET                                        R ST
                                                                                                                                                                 In _ Fan H        4                                                   39                                                                                                    SEG 1               4
                             D14                 E4                  C9                                                                             In _ Fan H                                P26                      X T1
                                                                                                                                                                 STEP_ I1          5                                                   38                                                                         R 8 1K                     SEG 5               5                                                                                                        In _ Fan L'
                                                                                                                                                    STEP_ I1                                  P00                      X T2                                                                                                      R EC 1                                                                                                                                                            L1
         R 17                                                                                                                                                    STEP_ I2          6                                                   37                                                             R EC                                                       6
                                                                                                                                                    STEP_ I2                                  P01                   V p p /IC
  8 .1 K /1 %                IN 4 1 4 8          1 0u F/1 6 V        1 04                                                                                        STEP_ I3          7                                                   36                                                                        C 14                                            7                                                                +12 VD 1 1
                                                                                                                                                    STEP_ I3                                  P02                        P24                                                                                                                       C 18
                                                                                                                                                                 STEP_ I4          8                                                   35                                                                                                                        8
                                                                                                                                                    STEP_ I4                                  P03                        P23                                                                                     1 02                 +5V                                                                                                                H EA T'
                                                                                                                                                                 H EA T            9                                                   34R XD20
                                                                                                                                                    H EA T                                    P04                        P22                                      R xD20                                                                          1 04
                                                                                                                                                                                  10                                                   3 3 TX D 2 0                                 +5V                                                                                                                                                IN 4 1 4 8                                                  R Y4
   C N8                +5V                                                                                                                                                                    V SS1                      P21                                      TxD 20                                                                                                                                                                                                                           M
                                                                                                                                                                 SEG 5            11                                                   32
                                                                                                                                                     SEG 5                                    P05                   VDD1
      2                                                                                                                                                          SEG 1            12                                                   31                                                                                                                                                                                                                Q3
                                                                                                                                                     SEG 1                                    P50                        P20                                                                                                                                                                                                 R 14                                         In _ Fan M '
                             D15                                                                                                                                 SEG 2            13                                                   30B UZ                                                                                                                                                                                                            9 01 4                                    L1
                                                                                                                                                     SEG 2                                    P51                        P33                                    B UZ                                                                                                                                          H EA T
      1                                                                                                                                                          SEG 3            14                                                   2 9 In _ Fan L
                             IN 4 1 4 8                                                                                                              SEG 3                                    P52                        P32                                   In _ Fan L                                                                                                                                                    2K
                                                                                                                                        +5V                      SEG 4            15                                                   2 8 In _ Fan LL
  T2_ I.p ip e                                                                                                                                       SEG 4                                    P53                        P31                                  In _ Fan LL
                                                 R 12 2K                                                                                                                          16                                                   2 7 R EC
                                                                                                                                                                                              AVDD                       P30                                    R EC
                                                                               T2_ I.p ip e                                                                                       17                                                   2 6 SD A
                                                                                                                                                                                              A V R EF                   P11                                    SD A                                                                                     IC 7                                                                                                                                      R Y5
                             D16                                                                                                                                T1                18                                                   2 5 SC L                                                                                                                                                                                                                                                    FA N _ IN H
                                                 E5                    C 11                                                                        T1_ roo m                                  A N I0                     P10                                    SC L                                                                          1                                    16
                                                                                                                                                                T2                19                                                   24                                                                                       STEP_ I1                  IN 1        O U T1                                   1
         R 18                                                                                                                                      T2_ I.p ip e                               A N I1                 A V SS
                                                                                                                                                                SW                20                                                   23                                                                                                                                                                                                                                 In _ Fan H '
  8 .1 K /1 %                IN 4 1 4 8          1 0u F/1 6 V        1 04                                                                         SW _ TEST                                   A N I2                  A N I5                                                                                                                  2                                    15                                                                                                              L1
                                                                                                                                                                M ode l           21                                                   22                                                                                       STEP_ I2                  IN 2        O U T2                                   2     C N11                                                                                                   C N10
                                                                                                                                                    M ode l                                   A N I3                  A N I4                                      EEPR O M
                                                                                                                                                                                                                                                                                                                                                                                                                                                +12 V                                            LO A D _ H EA T N
                                                                                                                                                                                                                                                                                                                                              3                                    14                                                                                                                                         1
                                                                                                                                                                                            IC _ U PD 7 8 91 6 6(4 2PIN )                                                                                                       STEP_ I3                  IN 3        O U T3                                   3
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         H EA T_N
                                                                                                                                                                                                                                                                                                                                              4                                    13                                                               R9                                             R Y6
                                                                                                                                                                                             IC 5                                 +5V                                                                                           STEP_ I4                  IN 4        O U T4                                   4
                                                                                                                                                                                                                                                                                                                                                                                                                                                    1K                                             H EA T N
                                                                                                                                                                                                                                                                                                                                              5                                    12
                                                                                                                                                                     C 13                                                                                                                                                       In _ Fan H                IN 5        O U T5            In _ Fan H '           5                                                 B U Z1
                                                                                                                                                    R 22                      R 24                                                                                        R 15 2k
                                                                                                                                                                                                                                                                                               R xD20                                                                                                                                                                                                                N
                                                                                                                                              3 .5 K /3 W                                                                                                                                                                                     6                                    11                    +12 V SW IN G                                                                                                       C N13
                                                                                   C N12                                                                            1 04          5 .1 k                                                              C 19                                                                      In _ Fan M                IN 6        O U T6        In _ Fan M '
                                                                                                                                                                                             PC 8 17                                                                                                                                                                                                                                                                                             LO A D _ H EA T L
                                                                                              S                                                                                                                                        +5                                                    C 20                                                                                                                                                                                                                             1
                                                                                     1                                                                                                                                                                1 01                                                                                    7                                    10                                                                   Q5
                                                                                                                                         D18                                                                                                                             4 .7 K              1 01                               In _ Fan L                IN 7        O U T7            In _ Fan L'                       R 16
                                                                                                                                                1 N 4 00 7                                                                                                                                                                                                                                                                                              9 01 4                                                           H EA T_L
                                                                                              N                                                                                                                                                                          R 27                                                                                                                                 B UZ                                                                                 R Y7
                                                                                                                                                                 C 17                                                                     R 25                                                                                                8                                    9                                      2K
                                                                                                                                                                                                                                                                                                                                                          V SS         VDD
                                                                                                                                  ZD 1                                                                                                    3 30                                                                                                                                                                                                                                                     H EA T L
                                                                                                                 E6                                           4 71 /25 0 v                  IC 6                                                                                                                                   C 12
                                                                                                                                                   R 23                                                                                                                                                                                                  U J N 2 00 3
                                                                                                                       C 15                                                                                                                                                                                                        1 04                                                                                                                                    H EA T'
                                                                                                                                   IN 4 7 4 9      1 00 K
                                                                                              1 00 u F/3 5V             4 73                                                                                                                                                                                                                                                                                                                                                                                         L
                                                                                                                                                                                                                                                             Q4                                                                            +12 V
                                                                                                                                                                                            PC 8 51                                                                N PN
                                                                                                            D17
                                                                                                  L1                              R 20           R 21                                                                                                                               R 14              TxD 20
                                                                                                                                  1 1K /2 W      1 1K /2 W                                                                                                                          2k
                                                                                                            1 N 4 00 7


                                                                                   +5

                                                              Q8                                                               D IS1
                                                           D TA 1 43                                                           W T4 0 21 B G                                      +5
                   SEG 1
                                                                                                                                                                                            Q10

                                                                                                                                                                                                                                       SEG 3


                                                           Q9                                                                                                                          D TA 1 43
                                                           D TA 1 43
                   SEG 2
                                                                                                                                          f
                                                                                                                        c om 1
                                                                                                                        c om 2


                                                                                                                                         h
                                                                                                                                         g


                                                                                                                                         d

                                                                                                                                         b
                                                                                                                                         e

                                                                                                                                         c

                                                                                                                                         a




                         E8                                                                                                                                                                                                            E7
                  1 00 U F/1 6 V                                            IC 8                                                                                                                                                  4 7U F/16 V          C 11
                                                   C 20          7                                                 13                                                                                                                                  1 04               R EC 1
                                                                              GND                      Q7
                  +5                               1 04                                                                                                                                                                  +5
                                                                                                                                                                                                                                1 50 R 1 9                                  1
                                                                14                                                 12
                                                                              Vcc                      Q6                                                                                                                                                                   2
                                                                                                                        R 45      3 30                                                                                        R EC 1                                        3
                                                                                                                   11
                                                                                                       Q5
                                          R 59                                                                          R 46       3 30
                                                                 9                                                 10
                                                                              MR                       Q4
                                          1 0K                                                                          R 47       3 30                                                LED 6
                                                                 8                                                 6                                                                   A U TO
                 SEG 4                                                        CP                       Q3
                                                                C 16                                                    R 48       3 30                                                     LED 7
                                          R 60                                                                     5                                                                        D EF.
                                                                1 01                                   Q2
                                          1 0K                                                                          R 49       3 30                                                               LED 8
                                                                 2                                                 4                                                                                  TIM ER
                 SEG 5                                                        Ds b                     Q1
                                                       C 17                                                             R 54       3 30
                                                                 1                                                 3                                                                                  LED 9
                                                       1 01                   Ds a                     Q0                                                                                             R UN
                                                                                                                        R 55       3 30
                                                                                    7 4H C 16 4                                                       ÏÔ Ê¾ ° å Ô ­À íͼ




                                                                                                                                                                                                                                                                                                  13
                                        D 1 IN 4 0 0 7* 8                   +12 V            IC 1     7 80 5                                   +5V                                                                                                                                                                                                                                 D5
                                                                                    1                                          3                                                                                                                                                                                                                                                   4 14 8
                                                                                              V in                Vout                                                 C N4
                                        D2                                                                                                                                           FU SE1                                                                                                                                                                                                                    C N7   +12 V                             C N8




                                                                                                     GND
                                                                                                                                                                                L                           L1
                      5VAC 1                                         E1          C1                                                    E2         C2                    1                                                                                           C N6                                                                                                           Q1                           2                                           1
C N1                                    D3                                                                                                                                           3 .1 5 A /2 50 V                                                                                                                                   C OM P             R1                      9 01 4
                                                                                 1 04                                                             1 04                 AC _L                                ZR 1                   C3                                1                                                     C OM P                                                                               1                     R L1
                      5VAC 2                                                                                                                                                                                                                                                                                                                                                                                                                         C OM P
  3                                                                                                                                                                                                                                                                                                                                                        2k
                                        D4




                                                                                                           2
  2                                                                                                                                                                                               1 4D 68 1 K                      0 .1 u F/27 5 V A C               2
                                                                                                                                                                       C N5                                                                              t                                                                                                                                                                                 L1
  1
                                                                                                                                                                                                            N                                                       TR A N S_IN                                                                                                                                                                         C N9
                                                             1 00 0 u F/25 V                                                  4 70 u F/1 6V                             1
TR A N S_O U T
                                                                                                                                                                                                                                                   PTC 1                                                                                                                                                                                                    1
                                                                                                                                                                       AC _N
                                                                                                                                                                                                                                                   8 2R M                                                                                                                                                                                       R 3V A LV E
                                                                                                                                                                                                                                                                                                                                                                                    D6
                                                                                                                                                                                                                                                                                                                                                                                                                                      R L2      5 1/1 W
                                                                                                                                                                                                                                                                                                                                                                                    4 14 8

                                                                                                                                                                                                                                                                                                                                                                                                                                                C4   3 33
                                                                                                                                                                                                                                                                                                                                                                                    Q2
                                                                                                                                                                                                                                                                                                                                                           R2                                                                         L1
                                                                                                                                                                                                                                                                                                                                       V A LV E                                     9 01 4
                                                                                                                                                                                                                                                                                                                          V A LV E                                                                                                                      C N10
                                                                                                                                                                                                                                                                                                                                                           2k
                                                                                                                                                                                                                                                                                                                                                                                                                                                            1
                                                                                                                                                                                                                                                                                                                                                                                                                                      R L3            F_O U T1


                                                                                                                                                                                                                                                                                                                                                                                                                                           L1
C N2                               +5V                                                                                                                                                                                                                                                                                                                                              D7                                                                  C N11
                                                                                                                                                                                                                                                                                                                                                                                    4 14 8
  4                                                                                                                                                                                                                                                                                                                                                                                                                                                         1
                       R4                D8                                                                                                                                                                                                                                                                                                                                         Q5                                                R L4            F_O U T2
  3                                                                                                                                                                                                                                                                                                                                   F_O U T1             R 15                     9 01 4
                      1 0K               IN 4 1 4 8                                                                                                                                                                                                                                                                  F_O U T1
  2                                                         R9       2K                                                                                                                                                                                                                                                                                    2k
                                                                                                                                                                                                                                                                                                                                                                                                                                           L1
                                                                                             T3
                                                                                                                                                                                                                                                                                                                                                                                                                                                        C N13
  1                                      D9                  E4                     C6                                                                                      IC 2 IC /U PD 78 F9 11 6
                                                                                                                                                                                                                                                                                                                                                                                                                                                            1
T3                      R5
                 8 .1 K /1 %             IN 4 1 4 8         1 0u F/1 6 V          1 04                                                            Ïà Ð ò C        1                                                28   RX                                                                                                                                                                                                            R L5              Ç ú Ö á Ïä
                                                                                                                                    Ïà Ð ò C                             P23 /IN TP0 P22 /R xD 2 0                                          RX                                                                                                                                     D13
                                                                                                                                                  Ïà Ð ò B        2                                                27   TX
                                                                                                                                    Ïà Ð ò B                             P24 /IN TP1 P21 /Tx D 2 0                                          TX                                                                                                                                     4 14 8
                                                                                                                        +5V                       Ïà Ð ò A        3                                                26                                +5V
                                                                                                                                    Ïà Ð ò A                                       P20
                                                                                                                                                                         P25 /IN TP2 /A SC K 20
                                              +5V                                                                                                                 4                                                25   µ¥Ïà Æ ô ¶¯                                                                                                                                                                                                        L1
                                                                                                                                                                         AVDD                 P11                                   µ¥Ïà Æ ô ¶¯                                                                                                                                    Q4
                                                                                                                                                     T3           5                                                24   Ç ú Ö á Ïä                                                                                                                         R 14
                                                                                                                                    T3                                   P60 /A N 10          P10                                     Ç ú Ö á Ïä                               X1                                                    F_O U T2                                      9 01 4
                                                                                                                                                     C U R R EN T 6                                                23                                                                                               F_O U T2
                                                      D10                                                                           C u rren t                           P61 /A N 11        VDD                                                              R 12
                                                                                                                                                                  7                                                22                                                                                                                                      2k
                                                                                                                 C7                                                      P62 /A N 12         V SS
                                                      1 N 4 14 8                                                                                                  8                                                21   X1                                   1M                                                                                                                                                               C N12
                                                                                                                 1 04                                                    P63 /A N 13          X1
                                                                                                                                                                  9                                                20   X2
                               R 6 2K                 R8                                                                                                                 A V SS               X2                                                                                                                                                                                                                               1
                                                                                                                                                                 10                                                19
        C u rren t                                                                                                        R 3 93 30                                      P50                   IC                                                                                                                                                                                                                              2
                                                      5 .1 K /1 %                                                                                    Ö ¸Ê¾ µÆ    11                                                18   R e s et
                                                                                                      C T1                                                               P51              R ESET                                        R ST
                                                                 D11                                                                LED 1                        12                                                17   C OM P                                                                                                                                                     D12
                                                                                                                                                                         P52                  P03                                        C OM P
                    C5                              R7           1 N 4 14 8                           0 05 7 U          +5V                                      13                                                16   V A LV E                                                                                                                                                   4 14 8
                  1 04            E3                1 6K                  R 10                                                                                           P53                  P02                                       V A LV E
                                                                                                                                                                 14                                                15   F_O U T1
                                                                                                                                                                         P00                  P01                                       F_O U T1
                           1 00 u F/1 6V                                1 K /1 %                                                                     Ñ ¹Á ¦¿ ª¹Ø                                                                                                                                                                                                                   Q3
                                                                                                                                    Ñ ¹Á ¦¿ ª¹Ø                                                                                                                                                                                                            R 13
                                                                                                                                                     F_O U T2                                                                                                                                                                   Ç ú Ö á Ïä                                         9 01 4
                                                                                                                                   F_O U T2                                                                                                                                                                        Ç ú Ö á Ïä
                                                                                                                                                                                                                                                                                                                                                           2k
                                                                                                                                                                                           +5V
                                                                                                                                                                                                             R 1 1 1 2K


                                                                                                                                                                                       C 10             1
                                                          1 0K                                                                                                                                                                 3                                                                                                                                                     D17
                                                                   +5V                                                                                                                1 04                                              R ST                                                                                                                                         4 14 8
                                                          R 16                                                                                                                                          2
                                                                                                                                                                                                                                    C 11
                                                                          IC 3                                                                    D14                                                   IC 6 K IA 70 4 2            1 04                                                                                                                                             Q6
                                        Ïà Ð ò C          R 19                                                                      R 24                                                                                                                                                                                                                    R 30
                      Ïà Ð ò C                                                                                                                                                                                                                                                                                                       µ¥Ïà Æ ô ¶¯                                     9 01 4
                                                                                                                                                                                                                                                                                                                     µ¥Ïà Æ ô ¶¯
                                                          2K                                                                        6 8K /2 W                                                                                                                                                                                                               2k
                                              C8                                                                                                  4 00 7
                                              1 04
                                                                          PC 8 17                                               R 22                                                                                                                                                                  Q7
                                                                                                                                                                                                                                                             TX             R 27                      N PN
                                                                                                                                5 .1 K                                                                                                      TX
                                                                                                                                                                        C N14                                                                                               2K
                                                                   +5V                                                                                             N                                                                                                                                  IC 8
                                                          R 17                                                                                                           1
                                                                                                                                                                         2
                                                          1 0K            IC 4                                                                    D15
                                                                                                                                    R 25                                 3
                                        Ïà Ð ò B            R 20                                                                                               L
                      Ïà Ð ò B                                                                                                                                           4
                                                          2K                                                                        6 8K /2 W                                                                                                                                                     R 38          PC 8 51
                                              C9                                                                                                  4 00 7                                                                                                                                                                                                                          R 31
                                                                                                                                                                                                                                                                                                  3 30
                                              1 04                                                                                                                                                                                                                                                                                                                                3 .5 k /3 W
                                                                          PC 8 17                                               R 23
                                                                                                                                                                                                                                                                                                                                                                     C 13
                                                                                                                                5 .1 K
                                                                                                                                                                                                                                                                                                 +5                                                                                   D18
                                                                   +5V                                                                                                                                                                                                                                                                                                                          C N3
                                        Ïà Ð ò A          R 18                                                                                                                                                                                                                                                   PC 8 17                                           4 71 /25 0 V                        S
                      Ïà Ð ò A                                                                                                                                                                                                                       R 28                                                IC 7                         R 29          C 12                                         1
                                                          1 0K                                                                                                                                                                        RX
                                                                                                                                                                                                                        RX
                                                   J 10                                                                                                                                                                                                                                                                               5 .1 K                                       1 N 4 00 7
                                                                                                                                                                                                                                                     2k                             C 18
                                                                                                                                                                                                                                         C 17                                                                                                      1 04                                                N
                                                                                                                                                                                                                                         1 01                              R 35     1 01                                                                                                                   N
                                                                                                                                                                                                                                                                           5 .1 K
                                                                                                                                                                                                                                                                                           +5V


                                               +5V


                                                      R 32
                                                      1 0K
                      C N15                                      Ñ ¹Á ¦¿ ª¹Ø
                            1                                                  Ñ ¹Á ¦¿ ª¹Ø
                        F1
                                                          C 15         J9
                                                          1 04

                     C N16
                           1
                       F2




                                                                                                                                                                                                                                                                     14
6.2 Wiring diagram
6.2.1 Cooling only
      MSE-21CR, MSE-24CR,                           MSE-28CR




                                                                   TRANS1
                                                                                               WIRING DIAGRAM
                                                                                               (INDOOR UNIT)
                  XS2 XP2                 CN1
          UNIT2




                             CN8
                                                    UNIT1              FUSE 3.15A/250V


         RT1                                                                   CN2
                             CN6                       CN10       CN11
         RT2                                                                     5
                                                                               CN
                             CN7                    CN9


                                                                                     FAN1
                                WHITE
                                BLUE
                                RED


                                Y/G




                                                                                         Y/G
                                                    SWING SWING                 M
                                                                                ~
                             XT1     1          S

                                                                  AG
                                                                              CAP1
                              TO OUTDOOR UNIT




                     CN1            CN2
                     CN11
                     CN10
                     CN8
                            UNIT1
                     CN6      CN3
                                     CN5




                              CN4




                                                     TO INDOOR UNIT    POWER SUPPLY




                                                                                15
6.2.2 Heating/cooling
MSE-21HR, MSE-24HR, MSE-28HR




                                                                                  TRANS1
                                                                                                              WIRING DIAGRAM
                                                                                                              (INDOOR UNIT)
                                   XS2 XP2              CN1
                           UNIT2




                                             CN8
                                                                  UNIT1               FUSE 3.15A/250V


                           RT1                                                                CN2
                                             CN6                       CN10      CN11
                           RT2                                                                  5
                                                                                              CN
                                             CN7                   CN9


                                                                                                   FAN1
                                                WHITE
                                                BLUE
                                                RED


                                                Y/G




                                                                                                        Y/G
                                                                   SWING SWING                 M
                                                                                               ~
                                             XT1    1         S

                                                                                 AG
                                                                                             CAP1
                                              TO OUTDOOR UNIT




     CN1            CN2
     CN11
     CN10
     CN9
     CN8
              CN3
                     CN5




     CN6    UNIT1
             CN4




                                   TO INDOOR UNIT       POWER SUPPLY




                                                                                  16
7.troubleshooting
The following tables will help to find where error happened (LED on indoor unit):
For models adopting electrical function (part I) (cooling only models):
                                                         Operation        Timer
                    Failure phenomenon
                                                           lamp           lamp
    Indoor fan speed has been out of control for
                                                            ☆              X
    over 1 minute
    Indoor room temp. or evaporator sensor is
                                                            ☆              On
    open circuit or short circuit
    Over current protection of the compressor
                                                            X              ☆
    occurs 4 times
    EEROM error                                             On             ☆
    No over-zero signal                                     ☆              ☆
For models adopting electrical function (part I) (reverse cycle models):
                                                         Operation        Timer     Defrosting
                    Failure phenomenon
                                                           lamp           lamp        lamp
    Over current protection of the compressor
                                                            ☆              X           ☆
    occurs 4 times
    Indoor fan speed has been out of control for
                                                            X              ☆           ☆
    over 1 minute
    No over-zero signal                                     ☆              ☆           ☆
    Temp. sensor on indoor evaporator is open
                                                            X              X           ☆
    circuit or short circuit
    Indoor room temp. sensor is open circuit or
                                                            X              ☆            X
    short circuit
    EEROM error                                             On             ☆            X
For models adopting electrical function (part II):
                                                         Operation        Timer     Defrosting   Auto lamp
                    Failure phenomenon
                                                           lamp           lamp        lamp
    Over current protection of the compressor
                                                            ☆              ☆           ☆             ☆
    occurs 4 times
    Indoor room temp. sensor is open circuit or
                                                            X              ☆            X            X
    short circuit
    Temp. sensor on indoor evaporator is open
                                                            ☆              X            X            X
    circuit or short circuit
    Temp. sensor on outdoor condenser is open
    circuit or short circuit (without for cooling only      X              X           ☆             X
    models)
    Outdoor unit protects(outdoor temp sensor,
                                                            X              X           ☆             ☆
    phase order etc)
    EEROM error                                             X              ☆            X            ☆
    Indoor unit communication err                           X              X            X            ☆


   Extinguish                 ☆ Flash at 5Hz

                                                           17
                                                        Cur r ent protectio n
                                                        (LED indi cates)


                                                         Check t he indoor
                                                         air filt er.


                                                         Check the out door
                                                         condenser.


                                                        Che ck t he positio n           If wro ng, t he unit w ill
                                                        and wiring of tem p             result in current
                                                        sen sor (all of the m).         prote ction, not tem p.


Check sp eed     Yes   Does ind oor heat -        Yes     D oes it occur in       No    Does outdo o r heat -        Yes   Che ck t he
of in door             exchan g er frosted?               C ool mode?                   ex changer fr os ted?              dra inage
motor.                                                                                                                     sys tem of
                                    No                                                               No                    out door unit.
                        Doe s the outdoo r        Yes   It is n orma l under      Yes   Doe s the ind oor
Che ck speed                         o
                        temp over 48 C?                 tha t ambient temp .                              o
                                                                                        temp low than 1 0 C?
of o utdoo r
mo tor.                             No                                                               No
                       Check t he over-                                                 Check t he solenoid
                       curre n t prot ect or of                                         coil o f reve rse valve.
Recycle the            comp ressor.
refrigerant
and recharge .                                                                             Check t h e soft
                          C heck the soft                                                  starter m ou ld.
                          st arter mou ld.

                                                                                        C heck t he ove r-
                        Re place the                                                    c urre nt prot ect or of
                        ma in PCB board .                                               c ompressor.


                           Re place the                                                   Replace th e
                           c o mpress or.                                                 main PCB board.


                                                        R eplace the re verse           Recy c le the ref rig e-
                                                        v alve.                         rant and rec h arge.




                                                                         18
                                                            T he unit does not
                                                            o per ate


Per f orm          Yes    Do th e LED lamps         Ye s   Does the power LED       No   C heck t he elect rical
the related               indicat es ERR?                  light af ter turning          so urce.
inst ruct io ns.                                           the switch on?
                                      No
                          Is th ere beep from       No      Ch eck t he bat ter y         Chec k the po wer
                          the unit when using               of the remot er.              s upplie r.
                          remoter?
                                      Yes
                                                            Check t he displa y             Chec k wirin g.
Replace the       Yes     Does the unit run in              board .
disp lay boa rd .         Forced Co ol m ode?
                                                                                          Does the volt ag e
                                      No
                                                            Rep lace the ma in      No    bet wee n inpu t
                            Ch ec k t he s oft                                            terminat es o f
                                                            PCB b oard.
                            s ta rter                                                     transformer i s
                                                                                          corre ct?

                                                                                                     Yes
                                                                                          Does the volt ag e
                                                                                          bet wee n outp ut        No
                                                                                          terminat es o f                 Replace the
                                                                                                                          transfo rmer.
                                                                                          transformer i s
                                                                                          corre ct?
                                                                                                     Yes
                                                                                    No     D oes the power         Yes   Replace the
                                                                                           tr ansfer to t he
                                                                                           di sp lay boa rd ?            disp lay boa rd .


                                                           Abnorm al n oise
                                                           from the indoor unit


Check t he         Yes    Does it happ en with      Yes     Does it happ e n in     No   Does it just happ en      Yes   It is b ecause
swing mo to r.            aut o swing?                      Fan On ly mod e?             in th e beginning of            of the h eat
                                                                                         coolin g or heat in g           rub be tween
                                      No                                                 mode?                           plastics parts.
Check t he                   Check t he fa n                                                                             It is n orma l.
swing lou ver .                                                                                      No
                             motor .
                                                                                           Check the inp ut
                                                                                           and output pip e.
                         Check t he cross flow
                         fan .
                                                                                         R ecycle the ref rig e-
                                                                                         r ant and recha rge.
                           Replace the b ear.


                                                            Abnorm al noise
                                                            fro m the outdoo r
                                                            uni t


  Check t he       Yes   Do th e fan blade rub      Yes     D oes it happ en in
  motor.                 with t he s hroud?                 C ool mode?
                                      No                               No
  Check t he             C heck t he fixing nut s          Check t he capillary.
  fan blad e.            of outdoo r unit.

                                                               C heck t he               Re cycle the ref rig e-
  Check t he                                                   co mpressor.              ran t and recharg e.
  motor
  supporter.




                                                                            19
   PROBLEM                  CAUSE                                      REMEDY
                  Power failure             Check the power cord.
                  Wiring failure            Check the wiring. Replace the terminates or wires if failure.
Not operating                               Check the input and the output on transformer. Replace if
                  Transformer failure
                                            failure.
                  Indoor PCB failure        Replace after checked failure.
                                            Replace the fan if cracked, out of balance, or partially
                  Cross flow fan failure
                                            missing.
                  Loose screws              Tighten them.
Indoor abnormal   Worn bearings             Replace after checked failure.
noise.                                      Replace the motor if knocking sounds continue when running
                  Motor failure             or loose, or the motor hums or noise appears to be internal
                                            while running.
                                            Replace the fan blade if cracked, out of balance, or partially
                  Fan blade failure
                                            missing.
                  Loose screws              Tighten them.
                                            Replace the motor if knocking sounds continue when running
Outdoor abnormal Motor failure              or loose, or the motor hums or noise appears to be internal
noise.                                      while running.
                                            Replace the compressor if sounds coming from inner of the
                  Compressor failure
                                            compressor.
                                            Remove the cabinet and carefully rearrange tubing not to
                  Copper tubing
                                            contact cabinet, compressor.
                  Display board or indoor
                  PCB failure               Replace the display board. If it is still false, replace the PCB.
                                            Check the voltage of battery. Replace batteries if the voltage
Remote control    Battery failure
                                            is lower than 2.3V.
failure.
                                            Normally, the remote control is not easy to damage. If the
                  Remote control failure    above two methods are not effectual, replace the remote
                                            control.




                                                     20
   PROBLEM                       CAUSE                                           REMEDY
                                                    Check leakage. Recycle the refrigerant. Correct and
                      Lack of refrigerant
                                                    recharge if there is any leakage in the refrigerant system.
                                                    Check the module and the capacitor connected to the
Compressor            Soft starter module failure
                                                    module. Replace if failure.
protection
                   Overcurrent protector            Check the resistance of compressor overcurrent protector.
                   failure                          Replace if failure.
                   Outdoor PCB failure              Replace after checked failure.
Open or short      Temperature sensor
                                                    Replace after checked failure.
circuit of outdoor failure
                   Connector failure or loose       Repair or replace the sensor.
temperature
                   Outdoor PCB failure              Replace after checked failure.
sensortemp or
Room               Temperature sensor
                                                    Replace after checked failure.
evap temp sensor failure
                   Connector failure or loose       Repair or replace the sensor.
open or short
                   Indoor PCB failure               Replace after checked failure.
circuit
Over load or too                                    Check the module and the capacitor connected to the
                   Soft starter module failure
low voltage                                         module. Replace if failure.
protection         Power failure                    Wait if checked the power voltage is really too low.
                   Wiring failure                   Correct if indoor fan motor wiring is loose.
Fan speed
                   Indoor fan motor failure         Check the input of fan motor. Replace if failure.
beyond control
                   Indoor PCB failure               Replace after checked failure.
Zero-crossing
                   Indoor PCB failure               Replace after checked failure.
error
                   Air filter                       Clean or replace if restricted.
                                                    Determine if the unit is properly sized for the area to be
                      Unit undersized
                                                    cooled or heated.
                      Condenser and
                                                    Clean or replace if restricted.
                      Evaporator
                                                    Take proper measures to make the door and windows sealed
                      Room structure
                                                    well if gap is found.
                                                    Clean or remove if any barrier is found to block the
                      Air flow
                                                    inlet/outlet wind flow of the unit.
                      Sunlight                      Add a awning if the outdoor unit is exposed to the sunlight.
                                                    Check the fan capacitor on outdoor power control board and
                                                    replace the board if not within +/-10% of manufacturer's
                      Outdoor fan motor
                                                    rating. Replace the motor if the speed is not within +/-10% of
                                                    manufacturer's rating but not because of the capacitor.
                                                    For electrical function 2.3 models. Check the fan capacitor in
                                                    indoor electric box (for some models, the capacitor is on
                                                    main PCB.) and replace the capacitor (or main PCB) if not
                      indoor fan motor
Insufficient                                        within +/-10% of manufacturer's rating.
cooling or heating.                                 Replace the motor if the speed is not within +/-10% of
                                                    manufacturer's rating but not because of the capacitor.
                                                    Check the tubes for reasons of leakage. Recycle the
                      Less refrigerant
                                                    refrigerant, correct the leakage points and recharge.
                                                    Regulate the flow if capillary tube is blocked. Make the
                      Capillary tube                evaporating temperature appropriate if the evaporator is
                                                    frosted.
                                                    The inlet and outlet valve of the compressor is damaged,
                                                    making the low pressure connected with the high pressure.
                      Compressor                    The refrigerating system is difficult to produce high pressure
                                                    and low pressure. Replace the compressor after checking for
                                                    the reason.
                      Heat sources                  Reduce if over loaded.
                                                    The two paths for refrigerant are connected, making the low
                                                    pressure connected with the high pressure. The refrigerating
                      reverse valve
                                                    system is difficult to produce high pressure and low pressure.
                                                    Replace the reverse valve after checking for the reason.
                                                             21
   PROBLEM                   CAUSE                                         REMEDY
                    LED failure                  Replace the display if checked failure.
No display on
                    Remote control shut the
indoor unit.                                     Push the button to turn the display on.
                    display
                    No power                     Check the voltage. Call an electrician if not within the limit.
                    Wiring                       Check the terminals. Repair and correct if loose.
                    Temperature setting          Check and adjust the temperature setting.
                    Mode setting                 Check and adjust the mode setting.
                                                 Check the module and the capacitor connected to the
No cooling or       Soft starter module failure
                                                 module. Replace if failure.
heating.
                    Reverse valve solenoid       Check the reverse valve solenoid coil. Replace the coil if
                    coil                         short, open or damaged.
                                                 If the reverse valve is blocked, the heating mode will not
                    Reverse valve                perform. Replace the reverse valve after checking the
                                                 reason.
                    Water drainage failure       Check the drainage pipe and repair if failure.
                    The indoor unit is incorrect
                                                 Correct the installation if not correct.
Water drops from installed
indoor unit         Drainage pipe blocked        Correct it.
                    The humidity in room is
                                                 It's normal if the humidity in the room is over 85%.
                    too high
                    Wiring failure               Check wiring. Correct if wrong wiring or loosen.
                                                 Check wiring. Correct if the commucication wire is not
                    Wire EMC
                                                 shielded wire or twisted with other wires.
Zero-crossing
                    Outdoor PCB failure          Replace if the LED is not on.
error               Outdoor transformer
                                                 Replace if failure.
                    failure
Insufficient                                     Replace the PCB if the photon coupling on indoor PCB is
                    Indoor PCB failure
cooling or heating.                              failure.
                    Indoor PCB failure           Replace after checked failure.




                                                           22
8. Electronic Control Principle of Large Cooling Capacity Split Model A/C
8.1 Fan only mode
      Fan speed is high/mid/low/ Auto
8.2 Cooling mode
 The 4-way valve is closed at cooling mode.
      The action of the compressor and the outdoor fan:
      T: Room temp.
      Ts: Setting temp.
                                     Condition                Compressor                     Outdoor fan
         Temp. up                    T> Ts+1                           On                    On
                                     T<Ts+1                            Off                   Off
         Temp. down                  T> Ts                             On                    On
                                     T<Ts                              Off                   Off
         Auto fan
                           Condition(T=Indoor Temp.-Setting Temp.)             Indoor fan speed
         Temp. up          T<1℃                                                       Low
                           1℃<T<4℃                                                    Med.
                           T>5℃                                                       High
         Temp. down        T> 4℃                                                      High
                           1℃<T<4℃                                                    Med.
                           T<1℃                                                       Low
       Anti-freezing control to indoor evaporator
                                     Condition                               Compressor                    Outdoor fan
                                     Temp.             Time
         Temp. up                    T> TE6                                         On                     On
                                     T< TE6            >4 Minutes                   Off                    Off
         Temp. down                  T> TE5                                         On                     On
                                     T< TE5            >4 Minutes                   Off                    Off
       Condenser high temp. protection( only for heat pump)

                                     Temp. Condition                         Compressor
         Temp. up                    T> TE10                                        Off
                                     T< TE10                                        On
         Temp. down                  T> TE11                                        Off
                                     T< TE11                                        On
                              >4 Minutes
      The outdoor fan motor speed control in the cooling mode.



                      T3                       High speed
                      32



                      30

                                                                    Low speed

8.3 Dehumidifying mode
8.3.1 Indoor fan speed at low speed.
8.3.2 Protection is same as cooling mode.

8.4   Heating mode
                                                                  23
8.4.1   Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode.
8.4.2   Generally, the outdoor fan is turned off with the on-off action of compressor in heating mode, except
        for the defrosting mode or the end of defrost.
8.4.3   Action conditions of compressor at heating mode: compressor must run for 4 minutes after starting
        and then judge temperature. Meanwhile other protections are still valid.
                                        Condition                 Compressor             Outdoor fan
          Room temp. up                 T> Ts+4                            Off           Off
                                        T<Ts+4                             On            On
          Room temp. down               T< Ts+3                            On            On
                                        T>Ts+3                             Off           Off


8.4.4   Indoor Fan actions at heating mode
        Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller,
        Anti-cold wind function 1.
                                                 Condition                        Indoor fan speed
                                                 T= Indoor exchanger temp.
          Indoor exchanger temp. up              T<TE1                            Off
                                                 TE1<T<TE2                        Low speed

                                                 T>TE2                            Setting fan speed
          Indoor exchanger temp. down            T>TE3                            Setting fan speed
                                                 TE4<T<TE3                        Low speed
                                                 T>TE4                            Off


        Anti- cold air protection 2 ( when the room temp. satisfy the setting temp.)
                                             T=evaporator pipe sensor temp.                 Indoor fan speed
          Room temp. up                      T<TE14+2℃                                      Low speed or stop
                                             T> TE14+2℃                                     Setting speed.
          Room temp. down                    T> TE14                                        Setting speed.
                                             T< TE14                                        Stop after 15 seconds Low speed


        Auto wind
                                             Condition                                      Indoor fan speed
                                             T=Indoor Temp.-Setting Temp.
          Room temp. up                      T<2℃                                                     Med. speed
                                             T>2℃                                                     Low speed.
          Room temp. down                    T> 0℃                                                    Low speed.
                                             T<0℃                                                     Med. speed
        Indoor evaporator high-temperature protection
                                                      Condition                             Compressor       Outdoor fan
                                                      T= Indoor exchanger temp.
          Indoor exchanger temp. up                   T<TE15=54℃                            On                      On(high speed)
                                                      TE15<T<TE8                            On                      On(low speed)
                                                      TE8<T<TE7                             On                      Off
                                                      T>TE7                                 Off                     Off
          Indoor exchanger temp. down                 T>TE9                                 Off                     Off
                                                      T<TE9                                 On                      On




8.5   Defrosting mode
8.5.1 Conditions of defrost:
      Defrosting starts when either of the following :
      T3 lower than 0°c, lasts for more than 40 minutes, provided that the time period when the temperature
      is lower than -3°c consecutively reaches 3 minutes.
      Calculate from the end of latest defrost, evaporator high temp. protection only closes outdoor fan with
                                                                      24
         the compressor still running. Add up to 90 minutes
.
8.5.2    Conditions of defrost ending:
         Defrosting ends when either of the following :
         The time gets to 10 minutes;
         T3>20°c

8.5.3    Time sequence of the whole defrosting procedure is as follows:

                                         Defrost 10or 6minutes

                                          55S                                      55S
                      Compressor

                     4-way Valve                                                  50S
                                         50S
                     Outdoor Fan

                     Indoor Fan

                                        15S




Remark: when the evaporator pipe sensor temp. more than TE16, The indoor fan start to run.

8.6      Auto mode
8.6.1    When running in automatic mode, the air conditioner automatically selects one of the following
         operation modes: cooling, heating or ventilation according to the difference between room temp. (TA)
         and set temp. (TS).
          TA—TS                       Operation mode
          TA—TS>2℃                    Cooling
          -1℃≤TA—TS≤+2℃               Air-only
          TA—TS<-1℃                   Heating (air-only for cooling only type)


8.6.2    At auto mode, the indoor fan blows automatically in selected mode.
8.6.3    One mode should be carried out for at least 15 minutes once selected. If the compressor cannot start
         for 15 minutes, reselect the operation mode according to the room temp. and set temp., or reselect
         when the setting temp. changed

8.7      Economic mode
         Cooling: The set temperature rise 1℃ per hour. Two hours later, the set temperature will maintain as a
         constant and the air circulation is kept at low speed,and the air condition will stop work after 7 hours.
         Heating: The set temperature decrease 1℃ per hour. Two hours later, the set temperature will
         maintain as a constant and the air circulation is kept at low speed, and the air condition will stop work
         after 7 hours. (Cold air proof function takes priority over all).

8.8     Manual operation
         Manual operation is controlled by touching buttons and divided into force cooling and
         forced auto mode. It transfers between these two modes by pressing the buttons, the
         cycling order of the button press is:
              Remote mode                 Forced auto                            Forced cooling

8.8.1 Forced Cooling
8.8.1.1 In forced cooling mode, the remote signal is not accepted.
8.8.1.2 The compressor is unconditionally turned on, after 30 minutes cooling operation whose fan mode is
        set as low, the A/C operates in the forced auto mode under the requirements of the forced auto
        mode.
                                                               25
8.8.1.3 During the start-up and operation, all of the following protecting functions work:
          3minutes start-up delay protection, overload protection, outdoor protection, evaporator
         Protection against low temperature. If any of the protection functions, the comparative protecting
         action is executed.
         The forced cooling mode is closed by one touch on the button, meanwhile the operation light is off,
         the buzzer buzzes lasts for 1 seconds, then A/C turns to be closedown status.
8.8.2. Forced Auto
8.8.2.1 Remote control signal can be received in forced auto mode. When receiving the signals, the
        forced auto mode will be canceled and the A/C changes to remote control status and performs
        operation as the signals indicates.
8.8.2.2 The system performs control according to the remote control auto mode with a set temperature of
        24°c.

8.9  Timer
       24 hours timer on or off.
8.10 Protecting Function
8.10.1 Compress with a delay of 3 minutes.
8.10.2 Sensor open and break protection
8.10.3 EEPROM error protection.
8.10.4 Current protection function.
                      Condition           Indoor fan          Compressor     Outdoor fan   Remark
        Current up    I< IRESTORE               On            On             On
                      IRESTORE <I< IFAN         On            On             Off           Heating mode
                                                Low speed     On             On            Cooling mode
                      IFAN <I<I5MIN                           Off            Off           After 5 Minutes
                      I5MIN<I< I3SEC                          Off            Off           After 3 Seconds
        Current       I5MIN<I< I3SEC                          Off            Off           After 3 Seconds
        down          IFAN <I<I5MIN                           Off            Off           After 5 Minutes
                      IRESTORE <I< IFAN         On            On             Off           Heating mode
                                                Low speed     On             On            Cooling mode
                      I< IRESTORE               On            On             On


8.11 Auto restart Function
       In case of a sudden power failure, this function automatically sets the unit to previous
       settings before the power failure when power returns.




                                                       26
Models and Parameters


  Model     MSE-21CR    MSE-21HR   MSE-24CR   MSE-24CR
  I3SEC       14A         14A        14A        14A
  I5MIN       20A         20A        20A        20A
   IFAN       22A         22A        22A        22A
 IRESTORE

 IDEFROST

   TE1                    25℃                   25℃

   TE2                    32℃                   32℃

   TE3                    30℃                   30℃

   TE4                    20℃                   20℃

   TE5        2℃          2℃         2℃          2℃
   TE6        12℃         12℃        12℃        12℃

   TE7                    63℃                   63℃

   TE8                    57℃                   57℃

   TE9                    50℃                   50℃

ANGLCOOL       67          67         67         67
ANGLHEAT                   93                    93
 ANGLOFF      130         130        130        130
THDEFROST

TMDEFROST

TLDEFROST




                                     27
  Model     MSE-28CR   MSE-28HR
  I3SEC       18A        18A
  I5MIN       24A        24A
  IFAN        26A        26A
IRESTORE

IDEFROST

   TE1                   25℃

   TE2                   32℃

   TE3                   30℃

   TE4                   20℃

   TE5        2℃         2℃
   TE6        12℃        12℃

   TE7                   63℃

   TE8                   57℃

   TE9                   50℃

ANGLCOOL       67         67
ANGLHEAT                  93
 ANGLOFF      130        130
THDEFROST

TMDEFROST

TLDEFROST




                                  28
9. Characteristic of temp. sensor
 Temp.℃       Resistance KΩ         Temp.℃    Resistance KΩ   Temp.℃   Resistance KΩ

   -10          62.2756              17           14.6181      44         4.3874

    -9          58.7079              18           13.918       45         4.2126

    -8          56.3694              19           13.2631      46         4.0459

    -7          52.2438              20           12.6431      47         3.8867

    -6          49.3161              21           12.0561      48         3.7348

    -5          46.5725              22            11.5        49         3.5896

    -4             44                23           10.9731      50         3.451

    -3          41.5878              24           10.4736      51         3.3185

    -2          39.8239              25             10         52         3.1918

    -1          37.1988              26           9.5507       53         3.0707

    0           35.2024              27           9.1245       54         2.959

    1           33.3269              28           8.7198       55         2.8442

    2           31.5635              29           8.3357       56         2.7382

    3           29.9058              30           7.9708       57         2.6368

    4           28.3459              31           7.6241       58         2.5397

    5           26.8778              32           7.2946       59         2.4468

    6           25.4954              33           6.9814       60         2.3577

    7           24.1932              34           6.6835       61         2.2725

    8           22.5662              35           6.4002       62         2.1907

    9           21.8094              36           6.1306       63         2.1124

    10          20.7184              37           5.8736       64         2.0373

    11          19.6891              38           5.6296       65         1.9653

    12          18.7177              39           5.3969       66         1.8963

    13          17.8005              40           5.1752       67         1.830

    14          16.9341              41           4.9639       68         1.7665

    15          16.1156              42           4.7625       69         1.7055

    16          15.3418              43           4.5705       70         1.6469




                                             29

				
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