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17.0 Fault Finding
© Baxi Heating UK Ltd 2016
Fault Finding Solutions Sections
Is there 230V at:
Main terminals L and N
Check electrical supply
1.
NO
Main terminal fuse
Replace fuse
Display
illuminated
2.
NO
PCB - X10 connector
Main terminals L and N
Check wiring
3.
NO
NO
A
B
C
NO
Fan connections correct at fan & PCB
X11 and X23 connectors - see
Wiring Diagram.
Make connections
Fan jammed or
faulty wiring
Connection
OK at X41
Display or
Main PCB fault
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
YES
230V between PCB - X13 connector
(blue) and PCB - X11 connector
(black) - see Wiring Diagram
NO
Replace PCB
YES
230V at pump
YES
Replace pump
NO
Check wiring
230V at PCB - X11 connector (between
blue & brown - see Wiring Diagram)
YES
NO
Replace PCB
Replace fan or wire
YES
YES
Temperature sensor faulty.
Check correct location and wiring.
NO
D
Replace sensor
Cold resistance approximately
10k @ 25° C (DHW and CH sensors)
(resistance reduces with increase in temp.)
YES
Gas at burner
Ensure gas is on and purged
Replace PCB
Replace gas valve
Check wiring and PCB - X36 connector
see Wiring Diagram
YES
NO
NO
E
Содержание Promax 24 Combi ErP
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Страница 57: ...57 Baxi Heating UK Ltd 2016 19 0 Notes ...