Fault Messages - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Fault messages

Fault number System characteristics
on the display
F.7 No DHW heating
F.8 No DHW heating
F.9 No DHW heating
F.10 No DHW heating
F.13 Regulates as if the outside
temperature were 0 °C.
F.14 Regulates as if the outside
temperature were 0 °C.
F.29 Regulates without flow tem-
perature sensor (low loss
header)
F.30 Regulates without flow tem-
perature sensor (low loss
header)
F.49 Burner in a fault state
F.50 Burner in a fault state
F.55 Burner in a fault state
F.56 Burner in a fault state
F.57 Control mode without room
influence
F.58 Control mode without room
influence
F.59 Burner locked out
F.62 Burner in a fault state
F.63 Burner in a fault state
Cause
Lead break, cylinder tem-
perature sensor
Short circuit, cylinder tem-
perature sensor
Lead break, outlet temper-
ature sensor DHW
Short circuit, outlet tem-
perature sensor DHW
Lead break, outside tem-
perature sensor
Short circuit, outside tem-
perature sensor
Lead break, low loss
header sensor
Short circuit, low loss
header sensor
Flue gas temperature sen-
sor disconnection
Short circuit, flue gas tem-
perature sensor
Lead break, CO sensor
Short circuit, CO sensor
Lead break, room temper-
ature sensor
Short circuit, room tem-
perature sensor
Power supply, low voltage
High limit safety cut-out
has responded.
Flue gas temperature lim-
iter has responded.
Troubleshooting
Measures
Check cylinder temperature sensor
(see page 91).
Check cylinder temperature sensor
(see page 91).
Check DHW outlet temperature
sensor (see page 91).
Check DHW outlet temperature
sensor (see page 91).
Check outside temperature sensor
(see page 91).
Check outside temperature sensor
(see page 91).
Check the low loss header sensor.
Check the low loss header sensor.
Check flue gas temperature sensor
(see page 91).
Reset the appliance.
Check flue gas temperature sensor
(see page 91).
Reset the appliance.
Check CO sensor.
Reset the appliance.
Check CO sensor.
Reset the appliance.
Check external room temperature
sensor of heating circuit or room
temperature sensor of remote con-
trol unit.
Check external room temperature
sensor of heating circuit or room
temperature sensor of remote con-
trol unit.
Check the power supply.
Check heating system fill level.
Check circulation pump. Vent the
system.
Reset the appliance.
Check heating system fill level.
Vent the system.
Reset the appliance once the flue
system has cooled down.
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