104
Check of R.V. coil
No
Yes
No
Yes
Yes
No
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 pin 1 and
pin 2 at connector CN721?
Turn OFF the breaker. Disconnect the connector CN721.
Replace the inverter P.C. board.
Replace the 4-way valve.
Replace the R.V. coil.
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 pin 1 and
pin 2 at connector CN721?
Replace the inverter P.C. board.
Replace the 4-way valve.
• The heating operation does not operate.
• The cooling operation does not operate.
The cooling operation or the heating operation does not operate.
MXZ-2D33VA/2D40VA/2D42VA/2D53VA/2D53VAH
MXZ-2D
CN721
Inverter 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 ...