Mitsubishi MUH-GA50VB - When OPERATION INDICATOR lamp flashes 6-time.; Check of outdoor thermistor

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Check of outdoor thermistor
Measure
resistance
between CN 661
1 and 2.
Measure
resistance
between CN 662
3 and 4.
No
Ye s
Replace the
thermistor.
Measure
resistance
between CN 662
1 and 2.
Connect CN661 and
CN662.
Turn ON the power
supply and press
the EMERGENCY
OPERATION switch.
Does the resistance
of thermistor have the
characteristics
on 10-5?
No
Ye s
Does the unit operate
10 minutes or more?
Replace the deicer P.C.
board.
Ok W.
W It is thought defective contact of the connector.
Turn OFF the
power supply.
<MUH-GA80VB>
Discharge temperature
thermistor(RT62)
<MUH-GA80VB>
Ambient temperature
thermistor(RT63)
Defrost thermistor(RT61)
When OPERATION INDICATOR lamp flashes 6-time.
Thermistors in the outdoor unit are abnormal.
F
w Disconnect the connectors CN661 and/ or CN662 from the deicer P.C. board.
(Check the characteristics of each thermistor.)
OB368B-2.qxp 10.5.25 9:16 AM Page 33