150
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
pin2 at connector CN912?
Turn OFF the power supply of the indoor and the
outdoor unit.
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 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 pin5 (+) and pin3 (-)?
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
pin2 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
pin5 (+) and pin3 (-)?
Replace the outdoor 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.
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MXZ-4D83VA/5D102VA
CN921
Noise
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lter P.C. board
OBH626K
Summary of Contents for MXZ-2D33VA
Page 26: ...26 MXZ 2D33VA E2 MXZ 2D42VA E2 MXZ 2D53VA E2 OBH626K ...
Page 27: ...27 MXZ 2D33VA E3 MXZ 2D42VA E3 MXZ 2D53VA E3 OBH626K ...
Page 28: ...28 MXZ 2D33VA ER2 MXZ 2D40VA ER2 MXZ 2D53VA ER2 OBH626K ...
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Page 30: ...30 MXZ 2D33VA ET2 MXZ 2D42VA ET2 MXZ 2D53VA ET2 OBH626K ...
Page 31: ...31 MXZ 2D33VA ET3 MXZ 2D42VA ET3 MXZ 2D53VA ET3 OBH626K ...
Page 33: ...33 MXZ 2D53VAH E1 OUTDOOR DISPLAY P C BOARD OBH626K ...
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