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.
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7
.0
7
•
G
.
0
7
.0
6
.1
1
22. Troubleshooting / process description
Defect determined:
Cause:
Remedy:
Fault code
Burner motor does
not start up
Electric supply lead faulty
Rectify faults in electrical installation
Fuse faulty
Replace
Safety thermostat locked
Unlock
42 h
Temperature of controller setting is
exceeded
Renewed start attempt after temperature
drop
MPA 22 faulty
Replace
04 h
Leak
Rectify leak
44H / 43H
No gas
Safeguard gas supply
Gas pressure monitor faulty
Replace gas train
22 h
Filter in gas train dirty
Clean or replace
Air pressure switch not in idle position
Check air pressure switch (see page 10)
20 h
Burner motor faulty
Replace
No load at terminal 5
Check plug connection and current path of
solenoid valve
Mains voltage
<
187 V
Rectify faults in electrical
installation
Burner starts up and
switches to fault mode
before or after expiry of
safety period
Air pressure switch does not switch
through during pre-ventilation
See Page 10
21 h
Ignition influencing of ionization monitor See Page 11
26 h
Gas solenoid valve does not open
Replace gas train
Starting gas quantity set too low
Increase starting gas quantity
No ignition
Check ignition electrode and setting, igni-
tion transformer and cable
Phase and zero mixed up
Connect connector unit in correct phase
sequence
Flame control faulty
Check according to Page 11
2BH
Air pressure switch opens during opera-
tion
See Page 10
21 h
Gas nozzle dirty or faulty
Replace gas nozzle
Flame extinguishes
during operation
No gas
Safeguard gas supply
Filter in gas train
dirty
Clean or replace
Flame blow-off
Incorrect burner setting
27 h
Air pressure switch contact opens
Check/replace air pressure switch
21 h
Flame signal too weak
Measure flame signal, check ionisation
electrode
27 h
