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

Page 29
Image 29
Glowworm Lighting 40 manual Yes

40 specifications

Glowworm Lighting 40 is a popular choice for homeowners seeking energy-efficient heating solutions. This compact, wall-mounted boiler is designed with modern technologies that ensure optimal performance and reliability.

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