Main 12 HE A - Page 53

17.0 Fault Finding
53
© Baxi Heating UK Ltd 2014
No Switched Live to
boiler. Check Systems
Controls and System
Wiring.
240V at B ?
Check wiring from
terminal block to PCB.
Check for shorts on
pump, fan & gas valve.
Replace if shorted &
replace fuse.
YES
NO
Replace PCB.
YES
YES
NO
NO
ELECTRICAL SUPPLY
240V at A ?
PCB fuse OK ?
B
Fuse
A
N
L
Lights
Off Off Off
ON
Optional
Pump
Live