De-scale
To gain access to internals of the water tank, the body lid must be
removed. Remove the 4 screws, break the lid gasket seal and lift it
clear of the body.
Note: Whenever the body lid has been removed from the boiler a new
lid gasket may be required to ensure a steam-tight joint. Damage to the
unit caused by a poor lid seal is not covered by warranty.
Scale deposits should be removed from all internal surfaces,
particularly the heating element, thermistor and level sensors by
gently tapping or scraping. If the deposits are soft, use a nylon
pad and fl ush out. Abrasive cleaning materials containing scouring
powders and detergents must not be used, such materials can
cause taste problems.
Suitable chemical de-scalants must only be used in accordance
with the manufacturer’s recommendations. This will prevent health
and safety issues, taste problems and potential damage to the
appliance. All trace of these chemicals must be removed before re-
commissioning the unit. Misuse of such chemicals is not covered by
the product warranty.
IMPORTANT Before re-commissioning the boiler it is
important that all scale and moisture is removed from the
level sensors and insulating gaskets, to avoid a false signal
being transmitted through the scale to the boiler body. Failure
to remove this scale and/or moisture will cause the sensor to
indicate to the PCB that water is covering the element, whether
or not water is present. In this situation the PCB will energise
the element causing failure. If in doubt, protect the element by
hand fi lling with water to the level of the draw-off tap before
switching on the electrical supply to the boiler.
When the red service indicator light on the front of the boiler is
illuminated, the machine has been starved of water in excess of
20 minutes and the solenoid valve has been disabled to prevent
damage to the solenoid coil through overheat. To re-energise the
solenoid, the unit must be disconnected from the electrical supply
and then switched back on, after fi rst reinstating the water supply.
If the unit requires servicing the red service indicator will fl ash a
sequence of light pulses. A 2x or 3x-light pulse generally indicates
that the low or normal level probes require de-scaling.
A 4x-light pulse means the water level has reached the high level
sensor and the likelihood is that the normal level sensor requires
de-scaling, or the machine has over-fi lled due to debris trapped in
the solenoid valve. The debris can be removed by drawing plenty of
water from the dispense tap, causing the solenoid valve to operate
and fl ush out the obstruction. The machine will reset itself once the
problem has cleared. If this does not rectify the problem, turn off
the water supply and check for debris in the solenoid valve fi lter.
The unit can be used normally while the service indicator is fl ashing
a 4x pulse. For further assistance, contact our service department
on 0113 249 6681 e-mail service@calomax.co.uk. or fi nd a local
service engineer at www.calomax.co.uk
Access to internal components can be gained by the removal
of the outer casing lid and front panel. Once the outer casing
is removed, access to the Service Area has been gained. This
access must be restricted to persons having knowledge and
practical experience of the appliance, in particular as far as safety
and hygiene are concerned.
SERVICE INSTRUCTIONS
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