Cannon CANTERBURY FREESTANDING User Instructions

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Cannon CANTERBURY FREESTANDING User Instructions Manual pdf 22 page image

22To check the operation of the electronic (module) controller (Type 537 ABC or DBC 579) you willrequire a digital multimeter with the functions to measure AC/DC voltage, continuity, resistance andmicro-amps.It is critical that the appliance is earthed and that the active and neutrals are not reversed.Item No Check Action1. No ignition when appliance • Check 240 volts power to heater in incoming plugis turned on. connector.• Check operation of room circulating fan. If the fanhas malfunctioned, or is faulty, the fan pressureswitch will recognise this and not allow the heaterto function.• Check operation of fan pressure switch. If roomcirculation fan is operating the pressure switch shouldenergise and allow ignition sequence.2. Power present but appliance • If there is power to the brown wire in the 8 waynot operating. switch connector the module may be in lockoutmode. To reset the module turn off the power supplyfor 10 seconds and then turn the power on again.3. After resetting the module • Check the external 2-A fuse in the loom.and appliance is still notoperating.4. If the fuse is O.K. and still • Check other connections are in place.appliance not operating. • If the last checks are correct the ignition electrodeshould spark at the same time as the gas controlsolenoid valves open. At this point the sparkelectrode will activate for up to 10 seconds maximum until the flame has been established. Terminal13 (white wire into the 8 way switch connector)will be energised as soon as the flame has beensensed.5. Confirm spark is produced • A blue spark can be seen when the heater ignitionwhen heater is turned on. process starts. Ensure spark is present betweenelectrode and burner.• The spark gap should be 4 - 6mm.6. If no spark being produced. • Check that spark lead is connected into module.• Check the continuity of the HT cable.• Check that there is no short circuit to earth andspark gap is correct. (Refer figure 31). A positivecheck is to use a jumper wire and connect one endof the earth and hold the other end with insulatedpliers 4mm from the spark generator on the module.If there is no spark to earth then change the module.7. Spark is being produced • Listen for cracking sound. The spark is misdirected.but not at burner. Check the spark ceramic insulator for signs ofcracks.Trouble-shooting

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