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5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Burner Control Unit
Display and programming unit
A display and programming unit is integrated into each
burner control unit. The display indicates the relevant
operating conditions, the service and parameter conditions
as well as all fault and error messages, relative to that
boiler section.
The display comprises four elements of seven segments
each. Four buttons enable adjustments to be made at the
different operating levels.
A
Status display
B
Service display
C
Reset button
D
LEDs, from left: heat demand, flame,
maintenance
and
fault.
F
Selection button
E
/
G
Cursor button
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 195.
You can exit at any time by pressing and holding the
reset button R
C
for 0.5 to 10 seconds.
Idle state check
System tests
Fan ramp-up
Pre-purge
Standby
Section start-up
after power supply
is switched ON.
Gas valve and/or
relay test
Burner Control Unit
