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Check of outdoor thermistor
Measure
resistance
between CN 661
1 and 2.
No
Yes
Replace the
thermistor.
Defrost thermistor (RT61)
Reconnect CN661.
Turn ON the power
supply and press
the EMERGENCY
OPERATION
switch.
Is the resistance of
thermistor normal?
No
Yes
Does the unit operate
10 minutes or more?
Replace the deicer P.C.
board.
OK ❈
❈ Defective contact of the connector is considered.
Turn OFF the
power supply.
Start
When OPERATION INDICATOR lamp flashes 6-time.
Thermistors in the outdoor unit are abnormal.
OB387-1.qxp 05.2.21 10:03 AM Page 27