Calling Up Fault Codes From The Fault Memory (Fault History) - Viessmann VITODENS 300 Service Instructions Manual

Fault display
(cont.)
Room temperature sensor
User fault
Checking and acknowledging faults
Note
If an acknowledged fault is not removed, the fault message will be re-displayed
after 24 h.
Constant temperature control units
Press the following keys:
1. a/b for further fault codes.
Weather compensated control unit
Press the following keys:
1. c for the current fault.
2. a/b for further fault messages.
Calling up acknowledged fault messages
Press the following keys:
1. d for approx. 3 s.

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.
2. d all fault messages are
acknowledged simulta-
neously, the fault display
will be cancelled and the
red fault indicator con-
tinues to flash.
3. d all fault messages are
acknowledged simulta-
neously, the fault display
will be cancelled and the
red fault indicator con-
tinues to flash.
2. a/b for the acknowledged fault.
Troubleshooting
73