Glowworm Lighting 40 manual Yes

13 Fault Finding

1

Reconnect supply

PM5

Is APS neon lit ?

YES

NO

YES

Is fan running ?

NO

				Replace APS
			Is there 240V at the fan ?
	Has boiler been		NO
	operating for 10		Is there 240V	NO
NO	seconds yet ?			Replace ignition
	YES		at C ?	PCB
			YES
	Switch High/Low Switch	NO	Will flue hood	NO
	to 'low'
	Is there a spark at		thermostat reset?	Replace flue hood
			- is there 240V at	thermostat
	electrode ?		the fan?
				YES

	YES		YES			Replace fan
									Flue hood overheating-
2		Does gas ignite ?							blocked secondary heat
					NO				exchanger (clean/replace)
		NO	Can the “low” gas					NO
				pressure be set
Isolate supply			(see data tables)
			at test point on gas
				valve?			Does discharge tube on			NO
					YES		ignition PCB flash ?

Check continuity of

both main coils

Coils ok?

YES NO

Does gas

ignite?

NO

Faulty injector

Replace

YES

3 YES

Examine electrode and leads. Repair/replace as necessary

Replace PCB

Replace ignition

PCB

Replace as necessary

Diagram 13.1

29 221834B