Calling Up Fault Codes From The Fault Memory (Fault History) - Viessmann Vitodens 333 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:
On a constant temperature control unit after 24 h
On a weather compensated control unit at 07:00 h the next day
Constant temperature control units
Press the following keys:
1. a/b for further fault codes.
Weather compensated control units
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.
2. d all fault messages are
acknowledged simulta-
neously, the fault display
will be deleted and the red
fault indicator continues to
flash.
3. d all fault messages are
acknowledged simulta-
neously, the fault display
will be deleted and the red
fault indicator continues to
flash.
2. a/b for the acknowledged fault.
The faults are ordered by date, thus
the most recent fault is fault number 1.
Troubleshooting
71