SERVICING
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| FAULT DIAGNOSIS |
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START |
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Does the pilot | Yes | Does the pilot | Yes | Does the main | Yes | Does the stove | Yes | |
ignite? | stay alight? | burner light? | stay alight? | |||||
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Fire satisfactory
No |
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| No |
| No | |
Is the gas supply | No | Is their air in | Yes | Is the main | ||
turned on? | ||||||
the system? | injector blocked? | |||||
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| No | Purge system | ||
Yes | Turn gas |
| No | |||
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on
| No |
| Investigate for blocked chimney |
| and adaquate ventilation check |
Yes | spillage. If their is no obvious |
blockage, seek expert advise. |
Clean and replace as necessary
Is the supply | No |
| Is the |
pressure |
| thermocouple | |
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correct? |
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| o.k.? |
| Correct |
| pressure |
Yes | Yes |
No | Check gas supply and operation of | |
control valve. Replace if necessary. | ||
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Replace pilot assembly
OSD
No
Is their a spark at the |
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| Is pilot flame the correct | Confirm supply | |
No |
| pressure is correct | |||
electrode? |
| size & playing onto |
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| thermocouple | Yes |
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Yes | Check for | No | Replace the pilot | |
spark output | OSD assembly | |||
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| from control |
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| valve. |
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OSD PILOT -
Check if gas is passing from control valve.
Yes
Replace pilot OSD assembly
No Replace pilot
OSD assembly
Replace control valve
Investigate control valve operation and replace if necessary.
Oxygen
Sensing
Device
Pilot
28 | Aarrow Sherborne GSL CF |