Fault Finding Solutions Sections - Baxi EcoBlue Advance Combi 28 Installation And Service Manual

Fault Finding Solutions Sections

A
Is there 230V at:
1. Main terminals L and N
2.
Main terminal fuse
3.
PCB - X10 connector
Main terminals L and N
B
Switch to DHW mode maximum flow and press
reset. During next 3 minutes check:-
230V at PCB - X13 connector
(between blue & brown - see Wiring
Diagram)
NO
Replace PCB
C
Fan connections correct at fan &
PCB X11 and X23 connectors -
see Wiring Diagram.
YES
230V at PCB - X11 connector
(between blue & brown - see Wiring
Diagram)
NO
Replace PCB
D
Temperature sensor faulty.
Check correct location and wiring.
YES
Cold resistance approximately
10k @ 25° C (CH & DHW sensor)
20k @ 25° C (Flue sensor)
(resistance reduces with increase in temp.)
NO
E
Gas at burner
Comp No. 7212138 - 02 (06/14)
NO
Check electrical supply
NO
Replace fuse
NO
Check wiring
230V between PCB - X13
YES
connector (blue) and PCB - X11
connector (black) - see Wiring
Diagram
NO
Make connections
YES
Fan jammed or
faulty wiring
NO
Replace sensor &
Ensure gas is on and purged
Check wiring and PCB - X14
connector see Wiring Diagram
NO
Replace PCB
NO
Replace PCB
YES
Replace fan or wire
reset boiler
YES
Replace gas valve &
Check combustion
Troubleshooting
Connection
OK at X40
NO
Display
illuminated
YES
YES
230V at pump
NO
Check wiring
EcoBlue Advance Combi
11
Display or
Main PCB
fault
Replace
pump
67