Viessmann B0KA, Инструкция по установке и обслуживанию

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A fault in the burner control unit causes the display to
show
" " .
Note
If a central fault message facility is connected, this is
switched on.
Calling up fault messages
Tap the following buttons:
1. and OK simultaneously for approx. 4 s, then
release.
2. / for "Er" message list
3. OK
4. / to select fault entry "E.1, E.2..." .
5. OK
6. Fault code is displayed.
Note
If the fault code has 3 digits, the first two digits are
shown first and then the last digit.
Acknowledging the fault display
Calling up the fault in the "Er" menu automatically
acknowledges the fault display.
Calling up acknowledged fault messages
Tap the following buttons:
1. " "
2. / to select "Er" .
3. OK
4. / to call up fault entry "E.1 to E.5" .
5. OK
6. / to display the fault code.
Calling up fault messages from the fault memory
(message history)
The 5 most recent faults (including those remedied)
are saved and can be called up.
Faults are sorted by date.
Tap the following buttons:
1. and OK simultaneously for approx. 4 s, then
release.
2. / for "b.4" message history
3. OK
4. Use / to select fault entry "E.1, E.2... or E.
5" .
For messages, see chapter on further messages.
5. OK
6. / for the required message
7. OK
Troubleshooting
Fault display on the programming unit
6173886
Diagnosis