Troubleshooting
Service Manual
176
Troubleshooting procedure
SMGB0066 rev.0 - 12/2009
↔1
Activation of high pressure swicth
↔1
Activation of protection control for excessively high pressure
↔1
Activation of low pressure control
↔1
Excessively low pressure difference
↔1
Excessively high discharge gas temperature
↔1
Excessively low temperature of heating exchanger refrigerant inlet
↔1
Excessively low suction gas temperature
Abnormal transmission between Inverter PCB and Main PCB
Abnormality of Power Supply Phase
Excessively low voltage or excessively high voltage for the inverter
11
Failure of water inlet temperature thermistor
1
Failure of water outlet temperature thermistor
1
Activation of freeze protection control (water inlet)
↔1
Activation of freeze protection control (water outlet)
1
Excessively high water temperature (compressor running)
1
Failure of refrigerant evaporating temperature thermistor (Open/Short)
Failure of ambient temperature thermistor (Open/Short)
Failure of discharge gas temperature thermistor (Open/Short)
Failure of refrigerant liquid temperature thermistor (Open/Short)
Failure of suction gas temperature thermistor (Open/Short)
Failure of discharge gas pressure sensor (Open/Short)
8
Failure of suction gas pressure sensor (Open/Short)
Incorrect PCB Setting
Transmission error between Main PCBs
(this alarm code is not available in this model)
Incorrect PCB operation
1
Abnormal operation of the current sensor
Activation of protection for inverter instantaneous over current
Transistor module protection activation
Increaseintheinverterntemperature
Abnormality of fan motor protection
No feed back signal from water pump
Cooler water failure (this alarm is not available in this unit)
Condenser water failure (this alarm is not available in this unit)
U(flickering)
Excessively high water temperature (compressor stop)
Failure of fan motor (MF1)
b
Failure of fan motor (MF2)
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