Viessmann Vitocrossal 300 Service Instructions Manual page 27

Burner control unit
Status Service
S
Fig. 24
A Reset button
LED: left heat demand; centre
B –
fault
Selection button
C
Operating display
In standard mode, the status indicator shows the cur-
rent operating status. The same applies after pressing
reset following a fault.
Status Service
Fig. 25
Status Service
Fig. 26
Status Service
Fig. 27
Status Service
Fig. 28
Status Service
Fig. 29
Status Service
Fig. 30
(cont.)
A
B
C
flame; right
– –
The display screen comprises three digits consisting of
seven segments each. 4 keys serve to make adjust-
ments at the different operating levels.
The following displays are shown automatically. If a
fault occurs, see the fault codes on page 32
onwards. You can exit at any time by pressing reset
button (hold for 5 to 10 s).
A
Standby
Start
Heat demand
System tests
Idle state check
Fan ramp-up
Valve check
Pre-purge
Pre-ignition
27