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Forandringer forbeholdes - Subject to change without notice - Ändringar kan förekomma
Diagnostics and fault finding guide
IMPORTANT: All maintenance or repair work must be executed by an approved installer.
Type of failure
Possible cause
Diagnostics
and what
to do
No power supply to the water heater
Check if there is any power on
the power supply terminal on the
No hot water
thermostat.
The thermostat may be set too high
Reduce thermostat setting by 5°C and
and cause the fuse or safety cut-off
press the reset button.
to operate.
Call approved installer.
Heating element or internal
Check if there is any power on the
electrical wiring out of order.
power supply on the connector of the
No heating
heating element between black and
yellow/green wires. If this is OK, press
the reset button on the fuse/safety
cut-off.
Thermostat is set too low.
Adjust the thermostat up using a std.
screwdriver.
Heating element or the internal
Check the resistance of the heating
electrical wiring partially out of order.
element on the connector of the
Water not warm enough
heater bundle, and the condition of the
internal wiring.
UX/UXT mixing valve (fitted on top)
See page 10 of this manual to see how
is incorrectly adjusted
to adjust the mixing valve to the
preferred temperature.
Water expands when heated. If there
If drip from the SV is severe it might
Safety valve (SV) is dripping
is no consumption of hot water over
need to be replaced. Some dripping
a period of time pressure builds up,
is normal. Alternatively an expansion
causing the safety valve to open.
vessel can be fitted.
The heating element may not be
Check the heating element o-ring seal
Leak warning outlet is dripping
properly tightened, or there may be
and all connections.
a leak.
Other problems, or if none of the
Contact the installer/supplier regarding
above solves the problem
any other failure.
WARNING: Incorrect handling of thermostat, safety valve or other valves may lead to tank
rupture. When servicing the unit follow instructions carefully:
1. Always turn off main power supply when water supply is being shut off.
2. Test the free operation of the safety valve regularly by opening the valve ensuring the water flows freely.
3. Electrical connection and all servicing of the electrical components should only be carried out by an
authorized electrician.
4. Fitting and all servicing of plumbing fixtures must only be carried out by an autorized installer.
5. When replacing the thermostat, safety valve or any other valve or part supplied with this unit, use only
approved parts of the same specification.
CAUTION:
• 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 before turning the power back on.
