72
Displayed fault
code
System characteristics
Cause
Measures
361
Burner in a fault state
Flame signal is not
present or insufficient at
burner start.
Check ionisation electrode and
connecting cable. Check plug-in
connections for loose contacts.
Note
Deposits on the electrodes indicate
foreign bodies in the combustion
air. Check the installation room and
flue system for causes of the de-
posits. For example: Laundry de-
tergents, cleaning agents, toilet-
ries, deposits in the ventilation air
supply (chimney)
Reset the appliance.
365
Burner in a fault state
Gas valve relay contact
feedback implausible (re-
lay contact is "welded up")
Replace the HBMU heat manage-
ment unit.
366, 367
Burner in a fault state
Gas valve electricity sup-
ply does not turn off.
Replace the HBMU heat manage-
ment unit. See chapter "Replacing
the HBMU heat management unit".
369
Burner in a fault state
Flame is lost immediately
after flame formation (dur-
ing safety time)
Check gas supply (gas pressure
and gas flow switch).
Check balanced flue system for
flue gas recirculation.
Check ionisation electrode for the
following:
■
Clearance to burner gauze as-
sembly.
■
Contamination on electrode
Reset the appliance.
370
Burner in a fault state
Gas valve or modulation
valve will not close.
Reset the appliance.
If fault occurs repeatedly, replace
fan unit.
Troubleshooting
Fault messages
(cont.)
6167586
Diagnosis
