ICE AIR ccHPWH Series, Installation And Maintenance Manual

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2.3. Trouble shooting
Faults Possible cause Trouble shooting
Excessive exhaust
pressure (Cooling)
There is air in the system or other non-
condensable gas condenser fin dirty or
debris blocked.
Remove the gas from the nozzle and vacuum
the condenser fins again if necessary.
Insufficient condensing air volume or
failure of condensing fan suction
pressure is too high.
Repair the condensing fan and resume
operation. See "Excessive suction pressure."
Overcharge of refrigerant. Discharge excess refrigerant.
Ambient temperature is too high. Check ambient temperature.
Low exhaust pressure
(Cooling)
Refrigerant leakage or filling is not
enough.
Check for leakage or fill with sufficient
refrigerant.
Low suction pressure. See "Low suction pressure."
Low suction pressure
(Cooling)
Insufficient water flow.
Check the temperature difference between inlet
and outlet water, adjust the water flow and
check the installation.
Water inlet temperature is low.
Check for leakage or fill with sufficient
refrigerant.
There is scale in evaporator due to
refrigerant leakage or insufficient
refrigerant filling.
Remove scale.
Excessive exhaust
pressure (Heating)
Insufficient water flow.
Check the temperature difference between inlet
and outlet water and adjust the water flow.
There is air in the system or other non-
condensable gas condenser fin dirty or
debris blocked.
Remove the gas from the nozzle and vacuum
the scale again if necessary.
Water outlet temperature is too high. Check the water temperature.
Excessive suction pressure. See "Excessive suction pressure."
Low exhaust pressure
(Heating)
Water temperature is too low. Check water temperature.
Refrigerant leakage or insufficient
refrigerant filling.
Check for leakage or fill with sufficient
refrigerant.
Low suction pressure. See "Low suction pressure."
Excessive suction
pressure (Heating)
Air side heat exchanger inlet
temperature is high.
Check ambient temperature.
Overcharge of refrigerant. Discharge excess refrigerant.
Low suction pressure
(Heating)
Refrigerant leakage or filling is not
enough.
Check for leakage or fill with sufficient
refrigerant.
Insufficient air volume. Check fan steering.
Air short circuit. Eliminate the cause of air short circuit.
Insufficient defrost operation.
Failure of four-way valve or sensor, replace if
necessary.