Viessmann Vitoladens 300-C Installation And Service Instructions Manual page 83

Fault codes
(cont.)
Displayed fault System characteristics
code
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
E4 Burner locked out
E5 Burner in a fault state
E6 Burner in a fault state
F0 Burner locked out
F1 Burner in a fault state
F2 Burner in a fault state
F3 Burner in a fault state
F4 Burner in a fault state
Cause
Input DE3 at
EA1 extension reports a
fault.
Short circuit, room tem-
perature sensor, heating
circuit 1 (without mixer)
Short circuit, room tem-
perature sensor for heat-
ing circuit 2 (with mixer)
Short circuit, room tem-
perature sensor for heat-
ing circuit 3 (with mixer)
Lead break, room temper-
ature sensor, heating cir-
cuit 1 (without mixer)
Lead break, room temper-
ature sensor for heating
circuit 2 (with mixer)
Lead break, room temper-
ature sensor for heating
circuit 3 (with mixer)
External LON subscriber
error
24 V power supply fault
Flame amplifier fault
Oil preheater does not re-
spond within tolerated
time.
Communication error,
burner control unit
Flue gas temperature lim-
iter has responded.
Temperature limiter has
responded.
Flame signal is already
present at burner start.
Flame not established at
end of safety time
Troubleshooting
Measures
Remedy fault at affected appliance.
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
settings (see page 97)
Check room temperature sensor,
heating circuit 2 and remote control
settings (see page 97)
Check room temperature sensor,
heating circuit 3 and remote control
settings (see page 97)
Check connections and LON sub-
scribers.
Replace control unit.
Press reset button R.
Replace the control unit if the burn-
er will not restart.
Check oil preheater and supply line
and replace if necessary.
Press reset button R.
Replace control unit.
Check heating system fill level.
Vent the system.
Press reset button R after flue sys-
tem has cooled down.
Check heating system fill level.
Check circulation pump. Vent the
system. Check temperature limiter
and connecting cables.
Press reset button R.
Check ignition electrodes, elec-
trode gaps and connecting cables.
Press reset button R.
Check oil supply, ignition electro-
des, electrode gaps and connect-
ing cables.
Check nozzle and solenoid valve
coil.
Correct the settings if necessary.
Clean dirty parts, replace faulty
parts.
Press reset button R.
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