Burner Control Unit; Display And Programming Unit; Operating Display - Viessmann Vitocrossal 200 CM2 400 Service Instructions Manual

Burner Control Unit

Burner Control Unit

Display and programming unit

A display and programming unit is integrated into the
burner control unit. The display indicates the relevant
operating conditions, the service and parameter conditions
as well as all fault and error messages.
The display comprises four elements of seven segments
each. Four keys enable adjustments to be made at the
different operating levels.
A Status display
Service display
B
C Reset button
D LEDs, from left: heat demand, flame,
maintenance and fault.
F Selection key
E/G Cursor keys

Operating display

In standard mode, the status display shows the current
operating conditions. The same applies in a fault state
after pressing reset button R C.
The following displays are scrolled through automatically.
In case of faults, see the fault codes from page 54. You
can exit at any time by pressing and holding the reset
button R C for more than 2 seconds.
46
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Service
System start-up
after power supply
is switched ON.
Standby
Idle state check
System tests
Fan ramp-up
Gas valve and/or
relay test
Pre-purge