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89
Check of outdoor thermistors
• When thermistor is abnormal.
Thermistor
Defrost
Discharge temperature
Outdoor heat exchanger temperature
Ambient temperature
Fin temperature
Symbol
RT61
RT62
RT68
RT65
RT64
Connector, Pin No.
Between CNTH1 pin1 and pin2
Between CNTH1 pin3 and pin4
Between CNTH1 pin7 and pin8
Between CNTH2 pin1 and pin2
Between CN171 pin1 and pin2
Outdoor control P.C. board
Outdoor power P.C. board
Board
Normal
Yes
No
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.
Normal
Replace the outdoor control P.C. board or the
outdoor power P.C. board.
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.
(MXZ-4E83VA/5E102VA/2E53VAHZ)
(MXZ-3E54VA/3E68VA/4E72VA/4E83VAHZ)
Replace the thermistor except RT64.
If RT64 is abnormal, replace the outdoor power
P.C. board since RT64 is combined with this board.
OBH723C
Summary of Contents for MXZ-2E53VAHZ
Page 16: ...16 MXZ 4E83VA Unit mm Air in Air in Air in Air out OBH723C ...
Page 17: ...17 MXZ 5E102VA Unit mm Air in Air in Air in Air out OBH723C ...
Page 18: ...18 Unit mm MXZ 2E53VAHZ OBH723C ...
Page 19: ...19 MXZ 4E83VAHZ Unit mm OBH723C ...
Page 22: ...22 MXZ 4E83VA E1 OBH723C ...
Page 23: ...23 MXZ 4E83VA E2 OBH723C ...
Page 24: ...24 MXZ 4E83VA ET1 OBH723C ...
Page 25: ...25 MXZ 4E83VA ET2 OBH723C ...
Page 26: ...26 MXZ 4E83VA ER1 OBH723C ...
Page 27: ...27 MXZ 5E102VA E1 OBH723C ...
Page 28: ...28 MXZ 5E102VA E2 OBH723C ...
Page 29: ...29 MXZ 5E102VA ET1 OBH723C ...
Page 30: ...30 MXZ 5E102VA ET2 OBH723C ...
Page 31: ...31 MXZ 5E102VA ER1 OBH723C ...
Page 32: ...32 MXZ 2E53VAHZ E1 OBH723C ...
Page 33: ...33 MXZ 2E53VAHZ ER1 OBH723C ...
Page 34: ...34 MXZ 4E83VAHZ E1 OBH723C ...
Page 35: ...35 MXZ 4E83VAHZ ER1 OBH723C ...