Troubleshooting; Calling Up Fault Code History; Call Up Current Fault Codes - Viessmann VITODENS 300 WB3A Service Instructions Manual

Calling up fault code history

The most recent 10 faults are saved and may be called up.

Call up current fault codes

1. Press G and d simultaneously
for approx. 2 seconds.
2. Call up the individual fault codes
with a or b.
Fault code order
1
.
.
.
10
All saved fault codes can be
deleted with e.
3. Press d.
Red fault indicator U flashes for all
faults.
"Fault" flashes in the programming
unit display when a fault message is
issued.
A fault in the burner control unit
causes the display to flash E.

Troubleshooting

Fault code
most recent
.
.
.
10th from most
recent
73