Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 129

Fault codes
(cont.)
Fault code dis- System characteristics
played
24 Control unit set to 0 °C out-
side temperature
25 No DHW heating
26 Control mode
27 Control mode
28 Control mode
29 Control mode
30 Burner blocked
31 Return temperature raising
■
facility valve opens.
Boiler circuit pump starts.
■
32 Burner blocked
33 *8 Burner blocked
34 Control unit set to 0 °C out-
side temperature
35 No DHW heating
36 Control mode
37 Control mode
38 Control mode
39 Control mode
3D Burner blocked
3E Burner blocked
41 No control mode at heating
circuit 1 (KM BUS)
42 No control mode at heating
circuit 2 (KM BUS)
43 No control mode at heating
circuit 3 (KM BUS)
44 No room influence at remote
control with room tempera-
ture capture 1 (KM BUS)
45 No room influence at remote
control with room tempera-
ture capture 2 (KM BUS)
This fault is only generated when a wideband probe including a separate PCB are being used.
*8
Cause
Short circuit, outside tem-
perature sensor
Short circuit, top buffer
temperature sensor
Short circuit, buffer tem-
perature sensor 2
Short circuit, buffer tem-
perature sensor 3
Short circuit, buffer tem-
perature sensor 4
Short circuit, buffer tem-
perature sensor 5
Lead break, boiler flow
temperature sensor
Lead break, boiler return
temperature sensor
Lead break, flue gas tem-
perature sensor
Lambda probe fault
Lead break, outside tem-
perature sensor
Lead break, buffer tem-
perature sensor 1 (top)
Lead break, buffer tem-
perature sensor 2
Lead break, buffer tem-
perature sensor 3
Lead break, buffer tem-
perature sensor 4
Lead break, buffer tem-
perature sensor 5
Ash box missing.
Current flue gas fan speed
does not match set speed.
Lead break to extension
kit 1 (KM BUS)
Lead break to extension
kit 2 (KM BUS)
Lead break to extension
kit 3 (KM BUS)
Lead break to remote con-
trol with room temperature
capture 1 (KM BUS)
Lead break to remote con-
trol with room temperature
capture 2 (KM BUS)
Fault rectification
Measures
Check outside temperature sensor.
Check top buffer temperature sen-
sor.
Check centre buffer temperature
sensor.
Check bottom buffer temperature
sensor.
Check bottom buffer temperature
sensor.
Check bottom buffer temperature
sensor.
Check the boiler flow temperature
sensor.
Check the boiler return tempera-
ture sensor.
Check flue gas temperature sen-
sor.
Clean the Lambda probe. Recali-
■
brate.
Notify heating contractor.
■
Check outside temperature sensor.
Check buffer temperature sensor.
Check buffer temperature sensor.
Check buffer temperature sensor.
Check buffer temperature sensor.
Check buffer temperature sensor.
Check ash box position.
Check flue gas fan.
Check connection to extension kit
1.
Check connection to extension kit
2.
Check connection to extension kit
3.
Check connection to remote con-
trol room temperature capture.
Check connection to remote con-
trol room temperature capture.
129