18 | Cannon Canterbury Freestanding
TrOublESHOOTiNg
To check the operation of the heaters electrical system
you will require a digital multimeter with the functions
to measure ac/dc voltage, continuity, resistance and
micro-amps.
It is critical that the appliance is
earthed and that the active and
neutral are not reversed.
Cannon Canterbury Freestanding
There is a green and red lED on the ignition controller. These lEDs act as diagnostic aids when the heater safety
systems produce a safe shutdown condition.
green lED: this is on when the flame is sensed at the flame sensor electrode.
red lED: this flashes according to the fault code.
No lEDs means there is no power to the ignition module. Check that the heater switch is set to ON by pressing the
ON/OFF button. Check the supply voltage. Check the 1.5 Amp fuse, replace if necessary. It is critical that the appliance
is earthed and that the active and neutral are not reversed. Do not use an extension cord. This appliance is designed
to operate at 240v AC. Substantial voltage dips, or running the unit at voltages substantially lower than 240v AC may
cause nuisance shutdowns. If there is still a problem check the power supply plug from the white box with a multim-
eter (240v AC). If there is no power from this plug when the heater should be on, replace the white box. remember to
re-test the gas pressures any time that the white box is changed. It is recommended that any callout to a customer’s
home should prompt the checking and resetting of the gas pressures.
Fault Codes
long Short morse Code
meaning
action
1
0
—
Normal operation
2
1
——•
Heater has attempted
to light, however it did
not sense flame within
the allowed time.
Check the gas supply to the unit is not switched off.
Check the gas pressures. Check the flame and spark
electrode connections and that they are positioned correctly.
Ensure that the spark is being produced at the spark
electrode tip, and is strong (clearly visible and around 6-8mm
in length). Adjust if necessary. The burner tray is earthed
through contact with the chassis. Check using a multimeter
between the earth pin (or earth tab) and the burner tray. If the
unit continues to spark after flame is present, ensure that the
supply voltage polarity is not reversed.
2
2
——••
Flame was established,
however the flame
electrode has sensed
that the flame has
become unstable and
has shutdown the gas.
Check that the flame sense electrode and the spark
plate are correctly positioned. Check the flame sense
connections. Check that the flue is correctly constructed.
Abnormally strong downdrafts can cause flame instability
therefore it is recommended that an appropriate flue cowl
is used for windy areas. Improper gas pressures can also
cause issues. Check the gas pressures.
1
2
—••
room fan (circulation
fan) pressure signal not
detected.
Check the fan for dust build up and lint. Check that the
room air fan is spinning. Check that the pressure tubes are
connected correctly and not pinched or kinked. The black
tube should run from the black side of the pressure switch
to the bottom tapping on the fan venturi. The clear tube
should go from the light side of the pressure switch and to
the top tapping on the venturi. Make sure that the pressure
switch wires are connected correctly. One wire should be
to C (Common) and the other should be to NO (Normally
Open). If it still doesn’t work after checking the above,
change the pressure switch.
