103
No
Yes
No
Yes
No
Yes
No
Yes
1. Disconnect the lead wire leading to the compressor.
2. 3 minutes after turning ON the power supply, start EMERGENCY
OPERATION in HEAT mode.
Is there voltage of 230 VAC between pin 1 and
pin 2 at connector CN712?
Turn OFF the power supply.
Disconnect the connector CN912.
Replace the 4-way valve.
Replace the control P.C. board/outdoor
control P.C. board.
Replace the R.V. coil.
Is there voltage 230 VAC
between the pin 1 and pin 3 at
connector CN711?
Replace the power
board /outdoor power
P.C. board.
Is there normal resistance
to R.V. coil? (Refer to 11-5.)
1. Disconnect the lead wire leading to the compressor.
2. 3 minutes after turning ON the power supply, start EMERGENCY
OPERATION in COOL mode.
Is there voltage of 230 VAC between pin1 and
pin 2 at connector CN712 ?
Replace the 4-way valve.
Replace the control P.C. board/outdoor
control P.C. board.
• When heating operation does not work.
• When cooling operation does not work.
MXZ-6C120/6C122VA
MXZ-6C120VA
MXZ-6C122VA
CN711
CN712
Control P.C.
board
Outdoor control
P.C. board
Check of LEV
No
Yes
No
Yes
Turn ON the power supply to the outdoor unit after checking
LEV coil is mounted to the LEV body securely.
Is "click - click" sound heard?
Or, do you feel vibration of LEV coil with your hand?
Disconnect the connectors.
CN791: LEV A, CN792: LEV B, CN793: LEV C,
CN794: LEV D, CN795: LEV E, CN796: LEV F,
CN797: LEV M.
Is there normal resistance to LEV coil?
(Refer to 11-5.)
Normal
Replace the inverter P.C. board, the
electronic control P.C. board, the control P.C.
board, or the outdoor control P.C. board.
Replace LEV coil.
• When cooling, heat exchanger of non-operating indoor unit frosts.
• When heating, non-operating indoor unit gets warm.
CN791
CN792
CN793
CN794
CN795
CN796
CN797
Control
P.C. board
MXZ-6C120
Electronic
control
P.C. board
MXZ-3C/
4C/5C
MXZ-2C
Inverter
P.C. board
MXZ-6C122
Outdoor
control
P.C. board
OBH584G
Содержание MXZ-2C30VA
Страница 24: ...24 WIRING DIAGRAM 6 MXZ 2C30VA MXZ 2C40VA MXZ 2C52VA OBH584G ...
Страница 25: ...25 MXZ 3C54VA OBH584G ...
Страница 26: ...26 MXZ 3C68VA OBH584G ...
Страница 27: ...27 MXZ 4C71VA OBH584G ...
Страница 28: ...28 MXZ 4C80VA OBH584G ...
Страница 29: ...29 MXZ 4C80VA2 OBH584G ...
Страница 30: ...30 MXZ 5C100VA OBH584G ...
Страница 31: ...31 MXZ 5C100VA2 OBH584G ...
Страница 32: ...32 MXZ 6C120VA E1 OBH584G ...
Страница 33: ...33 MXZ 6C120VA E2 OBH584G ...
Страница 34: ...34 MXZ 6C122VA E1 OBH584G ...
Страница 35: ...35 MXZ 6C122VA ER1 OBH584G ...
Страница 36: ...36 MXZ 6C122VA E2 OBH584G ...
Страница 37: ...37 MXZ 6C122VA ER2 OBH584G ...