Heat Pump Malfunction - Calorex PPT8 Installation Manual

Installation Manual
PPT8/12/16/22L/LY

9.0 Heat Pump Malfunction

WARNING: Isolate heat pump electrically before entering heat pump 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.
Any sign of abnormal operation such as water dripping should be reported immediately to an installer or
Calorex. If in doubt or if advice is required contact Calorex Service Department.
Telephone +44(0)1621 857171 or 856611
User Check List
Calorex Heat Pumps Ltd. · The Causeway, Maldon, Essex CM9 4XD, UK · Tel: +44 (0)1621 857 171
LAMP
MAINS RED
FAULT AMBER
DEFROST WHITE
WATER FLOW GREEN
MAINS RED
FAULT AMBER
DEFROST WHITE
WATER FLOW GREEN
MAINS RED
FAULT AMBER
DEFROST WHITE
WATER FLOW GREEN
MAINS RED
FAULT AMBER
DEFROST WHITE
WATER FLOW GREEN
MAINS RED
FAULT AMBER
DEFROST WHITE
WATER FLOW GREEN
MAINS RED
FAULT AMBER
DEFROST WHITE
WATER FLOW GREEN
UNIT DOES NOT OPERATE
OFF
OFF
Check mains supply- external fuses - isolator etc.
OFF
OFF
ON
OFF Water flow inadequate or faulty flow switch.
OFF
OFF
ON
First check water flow, then
OFF Check unit control fuse on single phase machine.
OFF
Check MCB on three phase machine
OFF
ON Check water and air flows are not restricted.
Check thermal cut out on Soft Start if fitted and that
ON
air flow is not restricted. Check unit control fuse on
single phase machine. Check MCB on three phase
OFF
machine.
OFF
FAN ON COMPRESSOR OFF
Unit on defrost (heating mode) check that air
ON
temperature is not below 7°C.(-15ºC for Y models)
OFF
Check evaporator is clean.
ON
ON
UNIT OPERATES INTERMITTENTLY
Check water and air flows are not restricted, and
ON
that electrical supply is adequate.
ON/OFF Check airflow to machine.
Check that linked in external equipment is not the
OFF
cause of the fault.
OFF
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ACTION