Fault Finding - Heatrae Sadia SUPREME 150SS Fitting Instructions And User Manual

9.0 FAULT FINDING

SAFETY NOTE: DISCONNECT THE ELECTRICAL SUPPLY
BEFORE REMOVING THE COVERS AND CARRYING OUT ANY OF
THE FOLLOWING ACTIONS. DO NOT BYPASS ANY SAFETY
CONTROLS.
SYMPTOM
No indicator lights
Unit does not fill on commissioning
Unit does not heat on commissioning 1. If "ON" indicator not illuminated –
Unit does not fill after commissioning 1. Level sensor fault
Unit does not heat after
commissioning
POSSIBLE CAUSE
1. If no water or heat – no power to
unit
2. If hot water available – no power
to indicator diodes
1. If "ON" indicator not illuminated –
no power to unit
2. If "READY" light flashing – water
supply not turned on
3. Solenoid fault
4. Low water pressure
no power to unit
2. If "READY" light flashing – water
supply not turned on
3. Solenoid fault
4. Low water pressure
5. Element fault
2. Solenoid valve fault
3. Electronic control fault
4. Low water pressure
1. Element fault
2. Electronic control fault
3. Control thermistor fault – short
circuit
ACTION
1. Check power supply is correctly
connected and switched on and that
primary cutout has not operated
2. Check connections to indicators at
4 way plug
1. Check power supply is correctly
connected and switched on and that
primary cutout has not operated
2. Check water supply
3. Check operation of solenoid valve,
replace if necessary
4. Check supply
1. Check power supply is correctly
connected and switched on and that
primary cutout has not operated
2. Check water supply
3. Check operation of solenoid valve,
replace if necessary
4. Check supply
5. Check element continuity. If faulty
replace
1. Check level system earth
connections
2. Check operation of solenoid valve,
replace if necessary
3. Check connections to electronic
control. Replace if necessary
4. Check supply
1. Check element continuity. If faulty
replace
2. Check connections to electronic
control. Replace if necessary
3. Check continuity (5Kohms at
100°C , 100Kohms at 25°C)
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