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HEAT PUMP MALFUNCTION
WARNING: Isolate machine electrically before entering machine or removing panels.
The user check list should be carried out before initiating a service call.
Do not attempt to interfere with any internal control settings as these have been factory calibrated and sealed.
If in doubt or if advice required contact Calorex Service Department.
Telephone (01621) 857171 or 856611
USER CHECK LIST
ACTION
MAINS
RED
OFF
FAULT
AMBER
OFF
Check mains supply- external fuses - isolator etc.
DEFROST
WHITE
OFF
WATER FLOW
GREEN
OFF
MAINS
RED
ON
FAULT
AMBER
OFF
Water flow inadequate
DEFROST
WHITE
OFF
WATER FLOW
GREEN
OFF
MAINS
RED
ON
First check water flow, then
FAULT
AMBER
OFF
Check unit control fuse on single phase machine.
Check MCB on three phase machine.
DEFROST
WHITE
OFF
WATER FLOW
GREEN
OFF
MAINS
RED
ON
Check water and air flows are not restricted.
FAULT
AMBER
ON
Check thermal cut out on Soft Start if fitted and that
air flow is not restricted. Check unit control fuse on
DEFROST
WHITE
OFF
single phase machine. Check MCB on three phase
machine.
WATER FLOW
GREEN
OFF
MAINS
RED
ON
Unit on defrost (heating mode) check that air
temperature is not below 7°C.
FAULT
AMBER
OFF
Check evaporator is clean.
DEFROST
WHITE
ON
WATER FLOW
GREEN
ON
MAINS
RED
ON
Check water and air flows are not restricted, and
that electrical supply is adequate.
FAULT
AMBER
ON/OFF Check gas charge and airflow to machine.
DEFROST
WHITE
OFF
WATER FLOW
GREEN
OFF
UNIT DOES NOT OPERATE
FAN ON COMPRESSOR OFF
UNIT OPERATES INTERMITTENTLY
LAMP
