Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 127

Fault display
Faults are signalled on the display by the "Fault" mes-
sage and by the red fault indicator flashing.
Checking and acknowledging faults
Note
If an acknowledged fault is not remedied, the fault
message will be redisplayed the following day at
07:00 h:
Press the following keys:
1. For troubleshooting
d
2. / To display further fault messages if there are
| ~
several faults.
Calling up acknowledged fault messages
Press the following keys:
1. .
å
2. / For "Fault".
| ~
Calling up fault codes from the fault memory (fault history)
The 10 most recent faults are saved and can be called
up.
Faults are sorted by date.
The most recent fault is listed at the top and is given
the fault number 01.
Fault
Outside temp sensor
Fault O2 probe
Acknowledge with
Fig. 80
Press the following keys:
1. + Simultaneously for approx. 4 s
d
å
The "Service" menu appears.
34
91
OK
A central fault message facility connected to plug
switched on.
3. To "Acknowledge" all fault messages
d
4. / For "Yes" or" No".
| ~
5. d To confirm
To restart the boiler, press "START/STOP" after the
fault has been cleared.
3. To confirm
d
4. / For the list of current faults
| ~
2. / For "Fault history".
| ~
3. To confirm.
d
4. / For "Display".
| ~
5. To confirm.
d
6. / To select the fault.
| ~
7. To display the selected fault.
d
8. Until the default display is shown.
ä
Fault rectification
gÖ is
127