106
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 breaker, start EMERGENCY
OPERATION in HEAT mode.
Is there voltage of 230 VAC between pin1 and
pin 2 at connector CN912?
Turn OFF the breaker of the indoor and the outdoor unit.
1. Turn OFF the breaker of the indoor and the outdoor unit, and
disconnect the connector CN781.
2. 3 minutes after turning ON the breaker, 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 breaker, start EMERGENCY
OPERATION in COOL mode.
Is there voltage of 230 VAC between pin1 and
pin 2 at connector CN912?
1. Turn OFF the breaker of the indoor and the outdoor
unit, and disconnect the connector CN781.
2. 3 minutes after turning ON the breaker, 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 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.
• When heating operation does not work.
• When cooling operation does not work.
MXZ-4D83VA/5D102VA
MXZ-4D83VA/5D102VA
CN721
Outdoor control P.C. board
OBH626E
Summary of Contents for SEZ-KD VA Series
Page 22: ...22 MXZ 2D33VA E2 MXZ 2D42VA E2 MXZ 2D53VA E2 OBH626E ...
Page 23: ...23 MXZ 2D33VA ER2 MXZ 2D40VA ER2 MXZ 2D53VA ER2 OBH626E ...
Page 24: ...24 MXZ 2D53VAH E1 OUTDOOR DISPLAY P C BOARD OBH626E ...
Page 25: ...25 MXZ 2D53VAH E2 OBH626E ...
Page 26: ...26 MXZ 2D53VAH ER2 OBH626E ...
Page 27: ...27 MXZ 3D54VA E1 OBH626E ...
Page 28: ...28 MXZ 3D54VA2 E2 OBH626E ...
Page 29: ...29 MXZ 3D54VA2 ER2 OBH626E ...
Page 30: ...30 MXZ 3D68VA E1 OBH626E ...
Page 31: ...31 MXZ 3D68VA E2 OBH626E ...
Page 32: ...32 MXZ 3D68VA ER2 OBH626E ...
Page 33: ...33 MXZ 4D72VA E1 OBH626E ...
Page 34: ...34 MXZ 4D72VA E2 OBH626E ...
Page 35: ...35 MXZ 4D72VA ER2 OBH626E ...
Page 36: ...36 MXZ 4D83VA E1 OBH626E ...
Page 37: ...37 MXZ 4D83VA E2 OBH626E ...
Page 38: ...38 MXZ 4D83VA ER1 OBH626E ...
Page 39: ...39 MXZ 4D83VA ER2 OBH626E ...
Page 40: ...40 MXZ 5D102VA E1 OBH626E ...
Page 41: ...41 MXZ 5D102VA E2 OBH626E ...
Page 42: ...42 MXZ 5D102VA ER1 OBH626E ...
Page 43: ...43 MXZ 5D102VA ER2 OBH626E ...