Viessmann Vitovalor 300-P Installation And Service Instructions For Contractors page 119

Fault codes for gas condensing module
Fault code dis- System characteristics
played
CF Control mode
No communication via LON
d6 Control mode
d7 Control mode
d8 Control mode
dA Control mode without room
influence
db Control mode without room
influence
dC Control mode without room
influence
dd Control mode without room
influence
dE Control mode without room
influence
dF Control mode without room
influence
E0 Control mode
E1 Burner in a fault state
E2 Burner in a fault state
E3 Burner in a fault state
E4 Burner blocked
E5 Burner blocked
E6 Burner blocked
(cont.)
Cause
Communication error,
LON communication mod-
ule
Input DE1 at EA1 exten-
sion reports a fault.
Input DE2 at EA1 exten-
sion reports a fault.
Input DE3 at EA1 exten-
sion reports a fault.
Short circuit, room tem-
perature sensor, heating
circuit 1 (without mixer)
Short circuit, room tem-
perature sensor, heating
circuit 2 (with mixer)
Short circuit, room tem-
perature sensor, heating
circuit 3 (with mixer)
Lead break, room temper-
ature sensor, heating cir-
cuit 1 (without mixer)
Lead break, room temper-
ature sensor, heating cir-
cuit 2 (with mixer)
Lead break, room temper-
ature sensor, heating cir-
cuit 3 (with mixer)
External LON subscriber
error
Ionisation current too high
during calibration
Heat transfer too low dur-
ing calibration.
Heat transfer too low dur-
ing calibration.
Temperature limiter has
shut down.
24 V power supply fault
Flame amplifier fault
System pressure too low
Troubleshooting
Measures
Check LON communication mod-
ule and replace if required.
If no LON communication module
is installed, set code "76:0" in
"General" group.
Remedy fault at appliance con-
cerned.
Remedy fault at appliance con-
cerned.
Remedy fault at appliance con-
cerned.
Check room temperature sensor,
heating circuit 1.
Check room temperature sensor,
heating circuit 2.
Check room temperature sensor,
heating circuit 3.
Check room temperature sensor,
heating circuit 1 and remote control
configuration (see page 175).
Check room temperature sensor,
heating circuit 2 and remote control
configuration (see page 175).
Check room temperature sensor,
heating circuit 3 and remote control
configuration (see page 175).
Check connections and LON sub-
scribers.
Check gap between ionisation
electrode and burner gauze as-
sembly (see page 78).
In open flue operation, prevent
high levels of dust in the combus-
tion air.
Press reset R.
Ensure adequate heat transfer.
Press reset R.
Ensure adequate heat transfer.
Press reset R.
Replace control unit.
Replace control unit.
Top up with water.
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