100
Check of outdoor thermistors
• The thermistor is abnormal.
Is the resistance of the thermistor normal? (Refer to 11-5.)
Disconnect the connector in the following table.
Does the unit operate 10 minutes or more without
showing thermistor abnormality?
Replace the thermistor except RT64.
In case that RT64 is abnormal,
replace the inverter P.C. board or the
outdoor power P.C. board since RT64
is combined with this board.
Normal
Replace the inverter P.C. board, outdoor
control P.C. board or the outdoor power
P.C. board.
Yes
Yes
No
No
Reconnect the connector and disconnect the lead wire
leading to the compressor.
3 minutes after turning ON the breaker, start
EMERGENCY OPERATION.
Thermistor
Defrost
Discharge temperature
Fin temperature
Ambient temperature
Outdoor heat exchanger temperature
Symbol
RT61
RT62
RT64
RT65
RT68
Connector, Pin No.
CN641 pin1 and pin2
CN641 pin3 and pin4
CN642 pin1 and pin2
CN643 pin1 and pin2
CN644 pin1 and pin3
Inverter P.C. board
Outdoor control P.C. board
Outdoor power P.C. board
Outdoor control P.C. board
Outdoor control P.C. board
Outdoor power P.C. board
Outdoor control P.C. board
Board
Thermistor
Defrost
Discharge temperature
Fin temperature
Ambient temperature
Outdoor heat exchanger temperature
Symbol
RT61
RT62
RT64
RT65
RT68
Connector, Pin No.
CN661 pin1 and pin2
CN661 pin3 and pin4
CN9 pin1 and pin2
CN665 pin1 and pin2
CN661 pin7 and pin8
Board
Thermistor
Defrost
Discharge temperature
Fin temperature
Ambient temperature
Outdoor heat exchanger temperature
Symbol
RT61
RT62
RT64
RT65
RT68
Connector, Pin No.
CN661 pin1 and pin2
CN661 pin3 and pin4
CN3 pin1 and pin2
CN661 pin7 and pin8
CN663 pin1 and pin2
Board
MXZ-3D54/3D68/4D72VA
MXZ-3D54VA2
MXZ-2D30/2D40/2D42/2D53VA/2D53VAH
MXZ-4D83/5D102VA
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 ...