Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 105

Fault displays in plain text
The following faults are displayed as plain text.
Fault codes
Displayed fault System characteristics
code
01 Burner locked out
02 Burner locked out
03 Burner locked out
0A System circuits cannot be
controlled
10 Burner locked out
11 Burner locked out
12 Burner locked out
20 Burner locked out
21 Return temperature raising
■
facility valve opening
Boiler circuit pump starts
■
22 Burner locked out
23 Burner locked out
*10
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
This fault is only generated when a wideband probe including a separate BLS PCB are being used.
*10
The meaning of the fault and the fault code shown to
the right are detailed in the table below.
Cause
One or more power supply
phases in power cable
have failed
One or more power supply
phases in power cable
have failed
One or more power supply
phases in power cable
have failed
No connection to the heat-
ing circuit PCB (HKK)
No connection to the aux-
iliary PCB (ZPK)
No connection to the aux-
iliary PCB (ZPK)
No connection to the aux-
iliary PCB (ZPK)
Short circuit, boiler water
temperature sensor
Short circuit, boiler return
temperature sensor
Short circuit, flue gas tem-
perature sensor
Lambda probe fault
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
Troubleshooting
Measures
Phase failure L1: Check power
supply and fuses
Phase failure L2: Check power
supply and fuses
Phase failure L3: Check power
supply and fuses
Check connection between boiler
PCB and heating circuit PCB
Check the type of auxiliary PCB
■
Check the connection between
■
boiler PCB, heating circuit PCB
and auxiliary PCB
Check the type of auxiliary PCB
■
Check the connection between
■
boiler PCB, heating circuit PCB
and auxiliary PCB
Check the type of auxiliary PCB
■
Check the connection between
■
boiler PCB, heating circuit PCB
and auxiliary PCB
Check boiler water temperature
sensor
Check boiler return temperature
sensor
Check flue gas temperature sensor
Cleaning and calibrating the Lamb-
da probe
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
105