8.0 DE-SCALING THE BOILER
It is recommended that the appliance be de-scaled regularly:
To de-scale the machine, first isolate from the electrical power supply.
Remove outer lid (insert the tip of a screwdriver into gap between case and lid
and twist on each corner).
Remove inner tank lid (6 screws)
Lift out both baffle plates from the inside of the tank
Using a suitable de-scaling agent, add the solution to the water inside the
tank. NOTE: Some de-scaling compounds may cause hot water to erupt. It is
advisable to add the solution a little at a time and follow the manufacturers
instructions closely.
Allow time for the de-scaling solution to neutralise (This will depend on how
heavy the scale deposits are). In the case of severe scale deposits it may be
necessary to repeat the de-scaling process.
On completion of successful de-scaling, evacuate the tank via the taps. To
completely empty the contents below the tap level, the drain tap (situated
behind the clip-on front panel) can be opened. Once complete, REMEMBER
to close the drain tap.
Ensure all traces of de-scaler are removed before using the boiler again.
Flush tank with copious amounts of clean cold water.
Examine the water level sensors for scale build-up - clean thoroughly as
necessary using a non-metallic scourer.
When de-scaling is complete, replace internal tank baffle plates, tank lid and
main outer lid.
Rather than frequently de-scaling the machine it may be preferable to install an
effective scale reducer or WRAS approved water softener. This will reduce the
frequency of de-scaling but will not remove scale completely in some areas.
9.0 FAULT DIAGNOSIS (Service Warning Light)
The boiler has a red “service” warning light facility. The light is designed to help
identify the cause of any malfunction. If the circuit senses a problem, the red
“service” light will flash a number of times and then pause and repeat the sequence.
Count the number of flashes between pauses and refer to the following table:
Serious problems will disable the boiler whilst less serious conditions will allow the
boiler to continue functioning until a convenient time arises for the fault to be
rectified.
