Viessmann VITODENS 200-W Service Instructions Manual page 92

Troubleshooting
Fault display
Constant temperature control unit
If there is a fault, the red fault indicator
A flashes. The two-digit fault code and
(subject to the type of fault) " " or " "
flash on the programming unit display.
A
R
2
1 3
0 4
bar
Other current faults can be displayed
with / . For an explanation of the fault
codes, see the following pages.
1
Example: Fault code "50"
Acknowledge fault
Press OK; the standard display is shown
again.
92
(cont.)
ã
5 0
A fault messaging facility, if connected,
will be switched OFF.
If an acknowledged fault is not remedied,
the fault message will be re-displayed
the following day and the fault message
facility restarted.
Calling up acknowledged faults
Press OK for approx. 4 s.
The 10 most recent faults (including
resolved ones) are saved and can be
scanned.
Calling up fault codes from the fault
memory (fault history)
The 10 most recent faults (including
those remedied) are saved and can be
called up.
Faults are sorted by date.
1. Press OK and å simultaneously
for approx. 4 s.
2. Select "ã" and enable fault history
with OK.
3. Select fault messages with / .