Troubleshooting
IMPORTANT:
All maintenance or repair work must be executed by an approved installer.
Problem
Possible cause
Solution
Hot water is not coming out.
No power supply to the water heater
Check if there is any power on the power supply terminal
on the thermostat.
The thermostat may be set too high and
cause the fuse or safety cut-off to operate.
Reduce thermostat setting by 5 °C and press the reset
button.
Heating is not working
Heating element or internal electrical wiring
is out of order.
Check if there is any power on the power supply on the
connector of the heating element between black and
yellow/green wires. If this is OK, press the reset button
on the fuse/safety cut-off.
Water is not warm enough
Thermostat is set too low.
Adjust the thermostat up using a standard screwdriver.
Heating element or the internal electrical
wiring is partially out of order.
Check the resistance of the heating element on the
connector of the heater bundle, and the condition of the
internal wiring.
UX mixing valve(fitted on top) is incorrectly
adjusted.
Adjust the UX mixing valve correctly to the preferred
temperature.
Safety valve(SV) is dripping.
Water expands when heated. If there is no
consumption of hot water over a period of
time pressure builds up, causing the safety
valve to open.
If drip from the SV is severe, it might need to be replaced.
Some dripping is normal. Alternatively an expansion
vessel can be fitted.
Leak warning outlet is
dripping.
The heating element may not be properly
tightened.
Check the heating element o-ring seal and all
connections.
There may be a leak.
Other problems, or if none
of the above solves the
problem.
-
Contact the installer/supplier regarding any other failure.
Incorrect handling of thermostat, safety valve or other valves may lead to tank rupture. When servicing the unit
follow instructions carefully:
• Always turn off main power supply when water supply is being shut off.
• Test the free operation of the safety valve regularly by opening the valve ensuring the water flows freely.
• Electrical connection and all servicing of the electrical components should only be carried out by an authorized
electrician.
• Fitting and all servicing of plumbing fixtures should only be carried out by an authorized installer.
• When replacing the thermostat, safety valve or any other valve or part supplied with this unit, use only approved
parts of the same specification.
WARNING
• Before resetting the safety cut-off or altering the thermostat setting, always remember to isolate the electrical
supply to the unit. This must be done prior to removing the electrical box lid.
• If the electric element or thermostat is defective, contact authorized electrician.
• After adjustments are completed, ensure the lid to the electrical box is refitted correctly and that the retaining
screw is properly fitted.
CAUTION
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ENGLISH
