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Aarrow Sherborne GSL CF
SERVICING
FAULT DIAGNOSIS
START
Does The
Pilot Light ?
Yes
Stove Is
Satisfactory
Is The Gas
Supply
Turned On ?
Does The
Pilot Stay
Alight ?
Does The
Main Burner
Light ?
Yes
Yes
Does The
Stove Stay
Alight ?
Yes
No
Turn
On Gas
No
Is Their Air
In The
System ?
Yes
Purge
System
Is The Main
Injector
Blocked ?
Yes
Clean &
Replace
As Necessary
Investigate For
Blocked Chimney &
Adequate Ventilation
Of Combustion
Products. If No
Obvious Blockage,
Seek Expert Advice.
No
Is The
Supply
Pressure
Correct ?
No
Correct
Pressure
Is The
Thermocouple
Ok ?
No
No
Yes
Replace
Pilot OSD
Assembly
No
Check Gas Supply & Operation
Of The Control Valve. Replace If Necessary.
No
Confirm Supply
Pressure Is Correct
Yes
Yes
Is Their A
Spark
At The
Electrode ?
No
Check For Spark
Output From
Control Valve
No
Replace
Control Valve
Is Pilot Flame The
Correct Size & Playing
Onto Thermocouple ?
Yes
Replace
Pilot OSD
Assembly
No
Replace
Pilot OSD
Assembly
Yes
Check If Gas
Is Passing
From Control
Valve ?
Yes
No
No
Replace Pilot OSD
Assembly
Investigate Control
Valve Operation &
Replace If Necessary
NOTE : OSD Pilot
(Oxygen Sensing Device)