Viessmann Vitocrossal 200 Service Instructions For Contractors page 31

Burner control unit VUC 310
Display and programming unit
A display and programming unit is integrated into the
burner control unit. The display screen shows the rele-
vant operating status, the service and parameter sta-
tus, as well as any fault or error messages.
Status Service
S
Fig. 32
Reset button
A
LEDs from left: heat demand, flame, maintenance
B
and fault
Selection button
C
Cursor keys
D
Operating display
In standard mode, the status indicator shows the cur-
rent operating status. The same applies in a fault state
after pressing reset button R.
The following displays are run through automatically. If
a fault occurs, see the fault codes from page 37. You
can exit at any time by pressing reset button R
(press for 0.5 to 10 s).
Status Service
Fig. 33
Status Service
Fig. 34
Status Service
Fig. 35
R
A
System start-up after pow-
er supply "ON"
Standby
System tests, idle state
check
The display comprises four elements of 7 segments
each. Four keys serve to make adjustments at the dif-
ferent operating levels.
Status Service
Fig. 36
Status Service
Fig. 37
Status Service
Fig. 38
Status Service
Fig. 39
Status Service
Burner control unit
Fan ramp-up
Valve and/or relay check
Pre-purge
Pre-ignition
Ignition
Flame formation safety
time
31