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51
G Check of outdoor thermistors
Replace the thermistor except RT64.
When RT64 is abnormal, replace the inverter P.C.
board.
Replace the inverter P.C. board.
No
No
Is the resistance of thermistor normal?
(Refer to 10-6.1.)
Reconnect the connector of thermistor.
Turn ON the power supply and press EMERGENCY OPERATION switch.
Does the unit operate for 10 minutes or more
without showing thermistor abnormality?
OK
(Cause is poor contact.)
Yes
Yes
Disconnect the connector of thermistor in the inverter P.C. board (see
below table), and measure the resistance of thermistor.
MUZ-GL09/12/15/18, MUY-GL09/12/15/18
Thermistor Symbol Connector, Pin No. Board
Defrost (MUZ) RT61 Between CN641 pin1 and pin2
Inverter P.C. board
Discharge temperature RT62 Between CN641 pin3 and pin4
Fin temperature RT64 Between CN642 pin1 and pin2
Ambient temperature RT65 Between CN643 pin1 and pin2
Outdoor heat exchanger temperature RT68 Between CN644 pin1 and pin3
MUZ-GL24, MUY-GL24
Thermistor Symbol Connector, Pin No. Board
Defrost (MUZ) RT61 Between CN671 pin1 and pin2
Inverter P.C. board
Discharge temperature RT62 Between CN671 pin3 and pin4
Fin temperature RT64 Between CN673 pin1 and pin2
Ambient temperature RT65 Between CN672 pin1 and pin2
Outdoor heat exchanger temperature RT68 Between CN671 pin5 and pin6
OBH733J
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