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TROUBLESHOOTING
Code No.
Item involved
41
Pressure
42
47
51
52
Inverter
53
54
ISPM
55
Outdoor fan
57
Compressor
EE
PMML138A_R1-eng-fre.indb 51
Contents of abnormality
Overload in cooling mode
(HP pressure switch tripped)
Overload in heating mode.
(HP pressure switch tripped)
Activation of Low Pressure Decrease Protection
Device
Abnormality of inverter current sensor
Overcurrent protection activating
Activation for protecting the ISPM
Increase in Inverter Fin temperature
ISPM Abnormality
Fan Motor Abnormality
Compressor Protection Alarm
Leading cause
-Check the airflow for a condenser (fan motor, battery)
- Presence of non-condensable gas
- Overcharged Refrigerant
- Presence of non-condensable gas
- Overcharged Refrigerant
- Check the pump (insufficient water flow).
Stoppage due to Excessive Decrease of evaporating Temperature
(Te < -35ºC) is activated 3 times in one hour. Incorrect overheating
(gas shortage), insufficient water flow.
Failure of Control PCB, ISPM
Failure of ISPM, Clogging of Heat Exchanger, Compressor blocked.
ISPM Failure
Abnormality of Compressor, clogging of Heat Exchanger
Abnormal Inverter Fin Thermistor.
Clogging of Heat Exchanger
Abnormal Outdoor Unit Fan
Defective ISPM
Disconnected wire or incorrect wiring between Control PCB and
inverter PCB.
Incorrect Wiring or Fan Motor Abnormality
Failure of Compressor
PMML0138A-rev.1 - 11/2009
51
19/11/2009 14:46:11
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