Burner Control Unit Burner Control Unit Vuc 310; Display And Programming Unit; Operating Display - Viessmann VITOCROSSAL CRU 800 kW Service Instructions Manual

Burner control unit
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. The keys
allow you to change settings in the various control lev-
els.
Status Service
S
Fig. 22
Reset button
A
Operating and fault indications:
B
Heat demand
Burner operation
Maintenance
Fault
C Selection key
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.
Display
Status Service
Fig. 23 Example
Status
0
0
0
0
0
0
0
0
0
32
R
Service
A
0
1
2
P
3
4
5
6
Note
Depending on the system configuration, the display
and control functions can in part also be carried out on
the boiler control unit.
Control unit installation and service instructions,
operating instructions
The following displays are shown automatically. If a
fault occurs, see the fault codes on page 38
onwards. You can exit at any time by pressing reset
button R (hold down for 0.5 to 10 s).
Meaning
System start-up after power supply "ON"
Standby
System tests, idle state check
Fan ramp-up
Valve and/or relay check
Pre-purge
Pre-ignition
Ignition, flame formation safety time
Flame stabilisation