Troubleshooting - Cannon CANT User Instructions

Troubleshooting

Item No Check
1 Check 240V power to heater.
2 Confirm spark is produced
when heater is turned on.
3 If no spark is produced.
4 Spark is heard but no flame
starts.
5 If flame lights and goes out.
6 Fan does not work
2. Remove the logs and the fuel bed from the burner chamber.
3. Disconnect the compression nut at the back of the burner now
visible through the primary baffle.
4. Remove lower front panel.
5. Remove the four M5 screws fixing the burner chamber fascia in
position and slide out taking a note of the "P" clip position
through which the thermocouple leads are passed.
6. Remove the two M5 screws fixing the burner to the burner cham-
ber fascia.
7. Remove the two 8G self tapping screws fixing the electrodes in
position.
8. Replace in reverse order.
Action
Use a multimeter to confirm presence of 240V.
A blue spark can be seen when the heater
ignition process starts. Ensure spark is present
between electrode and burner. Listen for cracking
sound when spark is produced.
• Ensure spark electrode is OK.
• Check fuse in heater.
• Check 240V power is present at spark box
when heater switch is ON. Terminal 1 is active
in. Terminal 2 is neutral.
• Check that all terminals on the module are
clean and firm.
• Check that solenoid valves are opening.
• Check that gas supply is on.
• Terminal 5 is active to valve 1.
• Terminal 7 is active to valve 2.
• Check that spark gap is as specified. Refer
figure 29 on page 20.
• Check that the wall socket to the appliance
has correct polarity.
• Check polarity in the lead to the appliance. (Do
not use extension cord).
• Check that the sense probe is in the flame.
• Check that the appliance is earthed correctly.
A multi meter between the lead earth plug and
the appliance parts should see a resistance of
0.1 Ohms. The burner earth should be
checked.
• Check for clogging with dust.
• Check all fan speeds for correct operation.
• Check fuse.
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