Fault Messages On The Display - Viessmann Vitopend 100-W Installation And Service Instructions Manual

Fault messages on the display

f
Displayed System characteris-
fault code tics
0A Burner blocked
0C Burner blocked
0E Burner blocked
F2 Burner in a fault
state
F3 Burner in a fault
state
Faults are indicated by a flashing fault
code (e.g. "F2") and the fault symbol U
2
on the display.
Cause
Gas supply pres-
sure too low
Mains voltage too
low
Flue gas monitor
has responded
The temperature
limiter has respon-
ded
Flame signal is al-
ready present at
burner start
Troubleshooting
Measures
Check the gas pressure
and the gas pressure
switch.
Check the power supply.
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).
Check heating system fill
level. Check circulation
pump. Vent the system.
Check the temperature
limiter (see page 38)
and connecting cables.
To reset, briefly turn rotary
selector "tr" clockwise
as far as it will go and then
back again (reset).
Check ionisation elec-
trode and connecting ca-
ble.
Switch ON/OFF switch
8 OFF and ON again (or
reset, see F2).
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