ISSUE 3
PAGE 6
GX F,ULT FINzING
To protect the unit in the event of continuous
over boilingg the unit is fitted with a thermal
cut3out device4 This device will cut power
to the entire machine and can be re3set
manually4 Before re3setting the deviceg the
cause of the trip hde3scale required etc4v
should be investigated4
The ‘Service’ light on the front of the machine
and Light Emitting Diodes (LED’s) fitted to the
main PCB, can be used to diagnose operating
problems with the machine.
When the green ‘service’ light is showing
solid colour, the machine has been starved of
water and has disabled the solenoid to protect
against burn out. In this state the boiler must be
disconnected from the power supply and then
switched back on to re-enable the solenoid after
the water supply has been re-established
Certain types of operational fault will cause the
‘service’ light to flash in a sequence of pulses
A
two pulse
generally indicates that the low
level probe requires de-scale
A
three pulse
indicates a loss of signal from
the normal water level probe , causing the unit
to overfill.
A
four pulse
indicates the unit has overfilled
due to debris trapped in the solenoid valve.
This is usually solved by drawing all the water
from the machine, causing the valve to operate
and flush out the obstruction. Check for debris
in the valves inlet filter.
A
five pulse
indicates the boiler has overfilled
due to scale on both the low and normal water
level probes.
The unit can be used normally while the
service light is flashing
LED’s fitted to the main PCB indicate the
operation of the solenoid and element. The
red LED indicates the element should be
energised and the yellow LED indicates the
solenoid should be energised. The solenoid,
dispense valve and element are permanently
live fed, and each are switched via the neutral
connection.
Water boils at different temperatures
depending on barometric pressure4 The
temperature should not be tuned higher
than the pre3set :) degreesg or over boiling
may occurg causing the unit to trip the over
heat cut3out device4
Fascia PfiK
1. Disconnect the 6 wires from the fascia PCB
2. Remove the retaining screws and gently pull
away from the lens housing
3. Fit new PCB and re-wire. Refer to the wiring
diagram at the rear of the manual
fileaning the zispense Nozzle
1. Slide the retaining clip out from the flow
restrictor housing.
2. Remove the breather hose.
3. Quarter turn the flow restrictor / nozzle
housing and pull free, clean and re-assemble
Key Switch
1. Disconnect the 2 wires from the fascia PCB
2. Remove the single retaining screw from the
centre of the switch
3. Slide the retaining collar away from the switch
and withdraw the switch from the boiler.
4. Fit the new switch ensuring it is the correct
way up so as to correspond with the lock / un-
lock symbols on the front of the boiler.
Note 9 Take care not to over tighten the retaining
screw when assembling
Push Kutton Switch
1. Disconnect the 4 wires from the fascia PCB
2. Using the tool provided, unscrew the retaining
collar anti-clockwise and withdraw the push
button switch.
3. Fit the new switch and re-wire. Refer to the
wiring diagram at the rear of the manual.
MXG ,djusting the Water Temperature Set
Point
The temperature potentiometer (Pot) is pre-set
at Calomax and will only require adjustment in
exceptional circumstances, the adjustment Pot
is located at the bottom left corner of the main
PCB. It controls the operating temperature of
the boiler. 1/2 turn clockwise on the device
will raise the temperature of the water by
approximately 1 degree centigrade.
