82
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-2D30/2D40/2D53VA/2D53VAH
MXZ-4D83/5D102VA
OBH626B
Summary of Contents for MXZ-2D33VA-E1
Page 16: ...16 OUTLINES AND DIMENSIONS 5 MXZ 2D33VA MXZ 2D40VA MXZ 2D53VA MXZ 2D53VAH Unit mm OBH626B ...
Page 20: ...20 WIRING DIAGRAM 6 MXZ 2D33VA MXZ 2D40VA MXZ 2D53VA OUTDOOR DISPLAY P C BOARD OBH626B ...
Page 21: ...21 MXZ 2D53VAH OUTDOOR DISPLAY P C BOARD OBH626B ...
Page 22: ...22 MXZ 3D54VA OBH626B ...
Page 23: ...23 MXZ 3D68VA OBH626B ...
Page 24: ...24 MXZ 4D72VA OBH626B ...
Page 25: ...25 MXZ 4D83VA OBH626B ...
Page 26: ...26 MXZ 5D102VA OBH626B ...