Trouble-shooting

To check the operation of the electronic (module) controller (Type 537 ABC) 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 neutrals are not reversed.

Item No	Check	Action

1.	No ignition when appliance	• Check 240 volts power to heater in incoming plug
	is turned on.	connector.

2.	Power present but appliance	• If there is power to the brown wire in the 8 way
	not operating.	switch connector the module may be in lockout
		mode. To reset the module turn off the power supply
		for 10 seconds and then turn the power on again.

3.After resetting the module the appliance is still not operating.

• Check the internal 3.5 amp fuse in the module.

4.If the fuse is O.K. and still appliance not operating

•Check other connections are in place.

•If the last checks are correct the ignition electrode should spark at the same time as the gas control solenoid valves open. At this point the spark electrode will activate for up to 10 seconds maxi mum until the flame has been established. Terminal 14 (white wire into the 8 way switch connector) will be energised as soon as the flame has been sensed.

5.	Confirm spark is produced	• A blue spark can be seen when the heater ignition
	when heater is turned on.		process starts. Ensure spark is present between
			electrode and burner.

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 and
			spark gap is correct. (Refer figure 32). A positive
			check is to use a jumper wire and connect one end
			of the earth and hold the other end with insulated
			pliers 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 of
			cracks.

8.	Sparks, ignites on low flame	• Check that the wall socket to the appliance has
	then extinguishes after 10		correct polarity. Do not use an extension cord. Check
	seconds. Continues to spark		polarity in the electrical supply lead to appliance.
	during flame presence.	• Check that the sense electrode is in the flame.
		• Check that appliance is earthed correctly. A check

between the earth pin on the plug and an unpainted part of the appliance should see a resistance of 0.1 ohms.

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