Viessmann Vitopend 100-W Installation And Service Instructions Manual page 73

Fault display
on
on
Displayed System character-
fault code istics
06 Burner locked out
0A Burner locked out
0C Burner locked out
CC Function at the ex-
ternal extension faul-
ty
F02 Burner in a fault
state
Faults are indicated by a flashing mes-
sage code (e.g. "F30") and fault sym-
bol or .
Cause
System pressure
too low
Gas supply pres-
sure too low
Mains voltage too
low
Communication
between control
unit and external
extension interrup-
ted
Temperature limit-
er has responded.
Troubleshooting
Measures
Check the system pres-
sure. If required, top up
heating water (see
page 34).
Check gas pressure and
gas pressure switch.
Check power supply.
Check connecting lead
between control unit and
external extension.
Check heating system fill
level. Check circulation
pump. Vent the system.
Check the temperature
limiter (see page 80)
and connecting cables.
Hold down MODE + OK
simultaneously until
flashes (reset).
73