69
Check of outdoor thermistors
• When thermistor is abnormal.
Disconnect the connector in the following table and measure
the resistance of the thermistor to check whether the thermistor
is normal or not. (Refer to 11-7.)
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 outdoor power board
since RT64 is combined with this
board.
Normal
Replace the outdoor electronic control
P.C. board, outdoor control P.C. board or
the outdoor power board.
Normal
Yes
No
Abnormal
Reconnect the connector in the following table and
disconnect the lead wire leading to the compressor.
3 minutes after turning ON the power supply,
start EMERGENCY OPERATION.
Thermistor
Defrost
Discharge temperature
Outdoor heat exchanger temperature
Ambient temperature
Fin temperature
Symbol
RT61
RT62
RT68
RT65
RT64
Connector, Pin No.
Between CN661 pin1 and pin2
Between CN661 pin3 and pin4
Between CN661 pin7 and pin8
Between CN663 pin1 and pin2
Between CN3 pin1 and pin2
Outdoor electronic control P.C. board
Outdoor power board
Board
MXZ-3C54/3C68/4C71/4C80/5C100VA
Thermistor
Defrost
Discharge temperature
Outdoor heat exchanger temperature
Ambient temperature
Symbol
RT61
RT62
RT68
RT65
Connector, Pin No.
Between CN661 pin1 and pin2
Between CN661 pin3 and pin4
Between CN661 pin5 and pin6
Between CN663 pin1 and pin2
Outdoor control P.C. board
Board
MXZ-6C120VA
Содержание MXZ-3C54VA
Страница 16: ...16 WIRING DIAGRAM 6 MXZ 3C54VA ...
Страница 17: ...17 MXZ 3C68VA ...
Страница 18: ...18 MXZ 4C71VA ...
Страница 19: ...19 MXZ 4C80VA ...
Страница 20: ...20 MXZ 5C100VA ...
Страница 21: ...21 MXZ 6C120VA ...