Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
9 Troubleshooting
83054802 1/2018-07 La
204-228
Fault
codes
Diagnostic
code
Cause
Rectification
23
00 … 03
Extraneous light during start-up
Find and eliminate extraneous light source
Check flame sensor
Fuel valves leaking, check
01
Extraneous light flame sensor QR…
02
Extraneous light ionisation electrode
03
Extraneous light flame sensor QR… and ion-
isation electrode
24
00 … 03
Extraneous light during shutdown
01
Extraneous light flame sensor QR…
02
Extraneous light ionisation electrode
03
Extraneous light flame sensor QR… and ion-
isation electrode
25
00 … 03
No flame at the end of the safety time
Check ignition
Check burner setting
Check flame sensor
Check fuel valves
01
No flame ionisation electrode
02
No flame flame sensor QR…
03
No flame flame sensor QR… and ionisation
electrode
26
00 … 03
Flame failure during operation
Check burner setting
Check fuel supply
Check flame signal [ch. 6.4.7]
01
No flame ionisation electrode
02
No flame flame sensor QR…
03
No flame flame sensor QR… and ionisation
electrode
27
–
Impermissible ON signal from air pressure
switch
Check air pressure switch [ch. 3.3.4].
Check pressure switch release [ch. 3.4.4].
28
–
Impermissible OFF signal from air pressure
switch
29
–
Impermissible ON signal from fan contactor
contact
Check electrical connection and fan con-
tactor contact [ch. 3.3.5].
Supply for contactor contact X3-02:1
2A
–
Impermissible OFF signal from fan contactor
contact
2B
–
Impermissible ON signal from FGR air pres-
sure switch
2C
–
Impermissible OFF signal from FGR air pres-
sure switch
2D
–
Impermissible ON signal at input start release
Gas
2E
–
Impermissible OFF signal at input start re-
lease Gas
2F
–
Low gas pressure switch has reacted
Check gas connection pressure
Check gas pressure switch
30
–
High gas pressure switch has reacted
31
–
Valve proving gas pressure switch has re-
acted, contact open, V1 leaking or V2 does
not open.
Check gas pressure switch
Check double gas valve
32
–
Valve proving gas pressure switch has
dropped out, contact closed, V2 or ignition
gas valve leaking or V1 does not open.
(1
If occurring sporadically: Optimise EMC measures. If occurring continuously replace defective component.