Viessmann Vitoligno 300-P Service Instructions For Contractors page 77

Fault display
■ "Sec. air damper"
■ "Combustion contr."
Calling up fault codes from the fault memory (fault history)
The 10 most recent faults are saved and
may be scanned.
The faults are ordered by date, thus the
most recent fault is fault number 1.
Fault history
01 Outside sensor
02 Boiler sensor
03 Fault
A B
A Fault number
B Plain text display
C Fault code
Deleting the fault codes from the fault memory
Press the following keys:
1. d + MENU simultaneously for
approx. 4 s.
The "Service" menu is
displayed.
2. |/~ for "Fault history".
3. d to confirm.
(cont.)
HC1
18
20
S11
C
Press the following keys:
1. d + MENU simultaneously for
approx. 4 s.
The "Service" menu is
displayed.
2. |/~ for "Fault history".
3. d to confirm.
4. |/~ for "Display".
5. Press g until the standard display is
displayed.
4. |/~ for "Delete".
5. |/~ for "Yes".
6. d to confirm.
7. Press g until the standard display is
displayed.
Troubleshooting
77