Fault Messages For Gas Condensing Module - Viessmann Vitovalor PT2 E11T Installation And Service Instructions Manual

Troubleshooting

Fault messages for gas condensing module

Fault number System characteristics
on the display
F.1 Burner in a fault state
F.2 Burner in a fault state
F.3 Regulating without return
temperature sensor
F.4 Regulating without return
temperature sensor
F.5 Flow rate not being moni-
tored.
F.6 Flow rate not being moni-
tored.
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.19 No DHW heating
F.20 No DHW heating
F.27 No DHW heating
F.28 No DHW heating
F.29 Regulates without flow tem-
perature sensor (low loss
header)
F.30 Regulates without flow tem-
perature sensor (low loss
header)
F.31 Mixer being closed
F.32 Mixer being closed
F.37 Burner blocked, heat genera-
tor circulation pump OFF
No central heating and no
DHW heating
104
Cause
Lead break, flow tempera-
ture sensor
Short circuit, flow temper-
ature sensor
Lead break, return tem-
perature sensor
Short circuit, return tem-
perature sensor
Lead break, flow sensor
Short circuit, flow sensor
Lead break, cylinder tem-
perature sensor
Short circuit, cylinder tem-
perature sensor
Lead break, outlet flow
sensor
Short circuit, outlet flow
sensor
Lead break, outside tem-
perature sensor
Short circuit, outside tem-
perature sensor
Lead break, bottom cylin-
der temperature sensor
Short circuit, bottom cylin-
der temperature sensor
Lead break, top cylinder
temperature sensor
Short circuit, top cylinder
temperature sensor
Lead break, low loss
header sensor
Short circuit, low loss
header sensor
Lead break, flow tempera-
ture sensor in heating cir-
cuit with mixer
Short circuit, flow temper-
ature sensor in heating
circuit with mixer
Lead break, water pres-
sure sensor
Measures
Check flow temperature sensor on
the burner control unit (see
page 130).
Reset burner.
Check flow temperature sensor on
the burner control unit (see
page 130).
Reset burner.
Check return temperature sensor
Check return temperature sensor
Check flow sensor
Check flow sensor
Check cylinder temperature sensor
(see pages 130 and 198)
Check cylinder temperature sensor
(see pages 130 and 198)
Check outlet flow sensor.
Check outlet flow sensor.
Check outside temperature sensor
(see page 130).
Check outside temperature sensor
(see page 130).
Check bottom cylinder temperature
sensor (see pages 130 and 198)
Check bottom cylinder temperature
sensor (see pages 130 and 198)
Check top cylinder temperature
sensor (see pages 130 and 198)
Check top cylinder temperature
sensor (see pages 130 and 198)
Check the low loss header sensor.
Check the low loss header sensor.
Check flow temperature sensor on
heating circuit extension kit.
Check flow temperature sensor on
heating circuit extension kit.
Check the water pressure sensor.