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Problem/Report
Possible Cause
Compressor runs and switching off
(cool/warm to touch) - Thermostat
set too high.
Thermostat not working.
Compressor runs but not switching off (hot to
touch).
Refrigeration problem.
Compressor not running at all - No
electricity power supply.
Compressor only hums slightly/ briefly.
Relays loose.
Compressor not working.
Fan not working.
Hot Water not
Hot water mode switched off.
Hot
Heating operation tripped off.
Break in supply wiring to control circuit.
Hot water demand too high.
Heating element not working.
Hot tank heavily scaled (signs of scale in top of
tank, loud boiling noises etc).
Break in supply wiring to main element.
Fault Diagnosis: Water Leaks
Problem/Report
Possible Cause
Suggested Action
Decrease cold thermostat set
point.
Check/replace thermostat.
Please contact technical support.
Please contact technical support.
Check the Power cord is
connected
and live, and the machine is
switched on.
Check and replace relays.
Check and refit relays.
Please contact technical support.
Check and replace, as required.
Switch on hot water mode (status
LED should show).
Reset overheat button on hot
tank.
Locate break and repair.
Advise user/s.
Check and replace Hot tank as
required.
Carry out thorough descale or
replace hot tank.
Locate break and repair.
Suggested Action
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