Fault Finding - Heatrae Sadia Aquatap Installation & User's Instructions

13.0 FAULT FINDING

SYMPTOM
N o i ndicator lights on
heater
H e a t e r d o e s n o t
c o m m i s s i o n i n g
H e a t e r d o e s n o t h e a t u p
o n c o m m i s s i o n i n g
H e a t e r d o e s n o t
c o m m i s s i o n i n g
H e a t e r d o e s n o t h e a t u p
a f t e r c o m m i s s i o n i n g
W a t e r o w f r o m v e n t a n d
p r i m a r y c u t - o u t o p e r a t e s
20
POSSIBLE CAUSE
1. If no water or heat - no power
to unit
2. If hot water available - no power
to indicator lights
l l o n
1. If POWER on indicator is not lit -
no power to unit
2. If TEMPERATURE READY
indicator ashing - water supply
not turned on.
3. Solenoid valve fault
4. Low water pressure
1. If POWER on indicator is not lit -
no power to unit
2. If TEMPERATURE READY
indicator ashing - water supply
not turned on.
3. Solenoid valve fault
4. Low water pressure
5. Element fault
l l a f t e r 1. Level sensor fault
2. Solenoid valve fault
3. Electronic control PCB fault
4. Low water pressure
1. Element fault
2. Electronic control PCB fault
3. Control thermistor fault -
short circuit
1. Solenoid valve fault
2. Level sensor fault
3. Electronic control PCB fault
ACTION
1. Check power supply is correctly connected
and switched on. Check primary cut-out has
not operated
2. Check wiring harness to indicator lights is
plugged into control PCB
1. Check power supply is correctly connected
and switched on. Check primary cut-out has
not operated
2. Check water supply
3. Check solenoid operation, replace if necessary
4.Check water is turned on and supply pressure
exceeds minimum requirements, 0.5 bar
1. Check power supply is correctly connected
and switched on. Check primary cut-out has
not operated
2. Check water supply
3. Check solenoid operation, replace if necessary
4.Check water is turned on and supply pressure
exceeds minimum requirements
5. Check element operation, if faulty replace
1. Check level sensor earth connection
2. Check solenoid operation, replace if necessary
3. Check all connections to the control PCB,
replace if necessary
4.Check water is turned on and supply pressure
exceeds minimum requirements
1. Check element operation, if faulty replace
2. Check all connections to the control PCB,
replace if necessary
3. Check continuity
1. Check solenoid operation, replace if necessary
2. Check level sensor earth connection
3. Check all connections to the control PCB,
replace if necessary