102
Check of R.V. coil
No
Yes
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 pin1 and
pin 2 at connector CN912?
Turn OFF the power supply of indoor and outdoor unit.
1. Turn OFF the power supply of indoor and outdoor unit, and
disconnect the connector CN781.
2. 3 minutes after turning ON the power supply, start
EMERGENCY OPERATION in HEAT mode.
Replace the 4-way valve.
Replace the noise filter P.C. board.
Replace the R.V. coil.
Is there voltage 12 VDC
between the connector
CN781 pin 5 (+) and pin 3 (-) ?
Replace the electronic
control P.C. board.
Disconnect the connector
CN912. 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 CN912?
1. Turn OFF the power supply of the indoor and the outdoor
unit, and disconnect the connector CN781.
2. 3 minutes after turning ON the power supply, start
EMERGENCY OPERATION in COOL mode.
Replace the 4-way valve.
Replace the noise filter P.C. board.
Is there voltage 12 VDC
between the connector CN781
pin 5 (+) and pin 3 (-) ?
Replace the electronic control P.C. board.
If the connector CN912 is not connected or R.V. coil is open, voltage
occurs between terminals even when the control is OFF.
• When heating operation does not work.
• When cooling operation does not work.
The cooling operation or heating operation does not operate.
MXZ-2C30/2C40/2C52/3C54/3C68/4C71/4C80/5C100VA
MXZ-4C80/5C100VA2
CN912
CN781
CN933
Electronic control P.C.
board
MXZ-2C
MXZ-3C/4C/5C
Inverter P.C. board
Noise filter P.C. board
Power 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 ...