Calorex Heat Pump Troubleshooting

Calorex heat pumps become more and more commonly used now. It means that the seller makes good stuff. However, it’s better to be ready for the unexpected. It means that if you see the problem in its functioning, don’t panic and try to do the repair by yourself. To achieve such goal, turn to the troubleshooting manual given here. It’s a nice stuff which is made in order to fix the fault.

Calorex AW631 Heat Pump Troubleshooting

ProblemDescriptionSolution
INDICATOR LAMPS "AW" POOL HEATERSMAINS - REDElectrical supply on
FAULT - AMBERInternal or external fault condition
DEFROST - WHITEDefrost Mode
INDICATOR LAMPS "AW" HEATER CHILLERMAINS (SWITCH) - REDElectrical supply on. Also includes ON/OFF rocker switch.
FAULT - AMBERInternal or external fault condition
DEFROST - WHITEDefrost Mode on water heating Chill Limit Fault on water cooling
INDICATOR LAMPS "WA" CHILLERMAINS (SWITCH) - REDElectrical supply on. Also includes ON/OFF rocker switch.
FAULT - AMBERInternal or external fault condition
DEFROST - WHITEChill Limit Fault on water cooling

Calorex 1531 Heat Pump Troubleshooting

ProblemLEDFlashesSolution
UNIT DOES NOT OPERATEMAINS - REDOFFCheck mains supply- external fuses - isolator etc.
FAULT - AMBEROFF
DEFROST - WHITEOFF
WATER FLOW - GREENOFF
MAINS - REDONWater flow inadequate
FAULT - AMBEROFF
DEFROST - WHITEOFF
WATER FLOW - GREENOFF
MAINS - REDON
FAULT - AMBEROFF
DEFROST - WHITEOFF
WATER FLOW - GREENOFF
MAINS - REDONCheck water and air flows are not restricted. Check thermal cut out on Soft Start if fitted and that air flow is not restricted. Check unit control fuse on single phase machine. Check MCB on three phase machine.
FAULT - AMBERON
DEFROST - WHITEOFF
WATER FLOW - GREENOFF
FAN ON COMPRESSOR OFFMAINS - REDONUnit on defrost (heating mode) check that air temperature is not below 7°C. Check evaporator is clean.
FAULT - AMBEROFF
DEFROST - WHITEON
WATER FLOW - GREENON
UNIT OPERATES INTERMITTENTLYMAINS - REDONCheck water and air flows are not restricted, and that electrical supply is adequate. Check gas charge and airflow to machine.
FAULT - AMBERON / OFF
DEFROST - WHITEOFF
WATER FLOW - GREENOFF