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O Check of defrost heater
MUZ-SF•VEH
Check the following points before checking electric continuity.
1. Does the resistance of ambient temperature thermistor have the characteristics? Refer to 11-6.1.
2. Is the resistance of defrost heater normal? Refer to 11-4.
3. Does the heater protector remain conducted (not open)?
4. Are both ambient temperature thermistor and circuit of defrost heater securely connected to connectors?
In HEAT mode, for more than 5 minutes, let the ambient temperature thermistor continue to read 5°C or
below, and let the defrost thermistor continue to read -1°C or below.
Is there 230 VAC between CN722
the inverter P.C. board? Refer to 11-6.1.
Replace the inverter P.C. board.
OBH629
NOTE: In case both thermistors are more than the above temperature, cool them with cold
water etc...
and
on
No
Not the problem of the inverter P.C. board.
Yes
43
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