38
Faults are indicated by a flashing fault
code (e.g. "F2") and fault symbol
U
.
Displayed
fault code
System characteris-
tics
Cause Measures
0A Burner blocked Gas supply pres-
sure too low
Check the gas pressure
and the gas pressure
switch
0C Burner blocked Mains voltage too
low
Check the power supply
0E Burner blocked Flue gas monitor
has responded
Check the flue.
Note
If the flue gas monitor re-
sponds 10 times within a
24 h period, the burner en-
ters a fault state (fault
"F6" is displayed).
F2 Burner in a fault
state
Temperature limit-
er has responded
Check heating system fill
level. Check circulation
pump. Vent the system.
Check the temperature
limiter (see page 43)
and connecting cables.
To reset, briefly turn rotary
selector "
tr
" clockwise
as far as it will go and then
back again.
F3 Burner in a fault
state
Flame signal is al-
ready present at
burner start
Check ionisation elec-
trode and connecting ca-
ble.
Turn ON/OFF switch
8
off and on again (or reset,
see F2).
Troubleshooting
Fault indicators on the display
5848 649 GB
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