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ELECTRICAL SUPPLY
NO
240V at A ?
YES
Lights
Off Off Off
No Permanent Live to boiler. Check Mains Fuse and
System Wiring.
17.0Fault Finding
A
B
NO
240V at B ?
YES
NO
240V at C ?
YES
NO
240V at D ?
YES
NO
PCB fuse OK ?
YES
Replace PCB.
No Switched Live to boiler. Check System Controls and System Wiring.
Check P/L wiring from terminal block to PCB.
Check S/L wiring from terminal block to PCB.
Check for short circuit on condensate pump, fan & gas valve. Replace if shorted & replace fuse.
S/L
N P/L
C
Fuse | D |
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© Baxi Heating UK Ltd 2011 | 51 |