IS09 ECN2087
13
Maintenance
Qualified personnel must carry out all maintenance work on the appliance.
Before commencing work on the appliance the electricity and water supplies must be isolated.
When replacing parts use only parts recommended by the manufacturer.
De-scale the appliance regularly. Severe scale deposits may block the drain valve. Prodding
through the tank-connector may puncture the drain hose.
Trouble-shooting
Fault Probable Cause Remedial Action
Will not fill
Solenoid inlet blocked.
Severe scale build-up between upper and
lower level sensors and the tank body.
Water ingress between upper and lower
level sensor housings and tank body.
Circuit board relay RL1 locked open
circuit.
Circuit board relay RL2 locked open
circuit.
Clean solenoid filter
De-scale the appliance
Clean and dry sensor housings.
Replace washers as necessary.
Replace PCB
Replace PCB
Continuous boil
Severe scale build-up on thermostat
bulb. Thermostat fails to sense water
temperature.
Contactor locked on.
Thermostat failed closed circuit.
De-scale the appliance
Replace contactor
Replace thermostat
Will not heat
Loss of continuity on from circuit board
to lower sensor
Check red wire for continuity,
connection to lower sensor.
Replace circuit board if
necessary
Overflow
Thermostat failed open circuit during
heating cycles.
Circuit board relay RL1 locked closed
circuit.
Solenoid locked open.
Replace thermostat
Replace PCB
Ingress of foreign material.
Replace solenoid
In the unlikely event of thermostat failure noticeable steam emissions will be observed from the
base of the appliance in the vicinity of the spillage tray. In such event the appliance should be
isolated from the main electrical and water supplies. A service engineer should be then contacted
to facilitate repair.
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