Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 193

Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Burner Control Unit Flow Diagram
State description:
Phase Display
System start "A"
Relay test "P"
Standby "0"
Start-up "1"
"2"
"3"
"4"
"5"
Operation "6"
"7"
Shutdown "8"
Waiting "U"
"C"
Fault states "9"
"10"
"11"
"F"
(continued)
Description
System start
Fan ramp-up, system start
Forced ventilation, system start
Fan ramp-up for valve test
Safety relay test
Relay/valve test V1
Test time V1
Relay/valve test V2
Test time V2
Start-up meter, initialization
Standby
Flame signal amplifier, test
Gas fan, air pressure switch and boiler water
temperature sensor test
Fan ramp-up
Pre-purge
Adjusting start-up load, test WD1
Pre-ignition
Ignition safety time
Flame detection safety time
Flame stabilizing time
Start-up partial load
Modulating operation
Adjusting shutdown load
Reheat, test WD2
Fan ramp-up, post-purge
Post-purge
Waiting for restart
Waiting mains, gas pressure
Forced ventilation fault
Flame tear-off
Safety shutdown
Fault shutdown
Burner Control Unit
Duration
10 seconds
max. 20 seconds
20 seconds
max. 20 seconds
0.9 second
2 seconds
1.1 seconds
2 seconds
1.1 seconds
0.1 second
0 ... seconds
max. 50 seconds
max. 20 seconds
max. 20 seconds
10 seconds
1.9 seconds
2 seconds
2.3 seconds
max. 0.51 second
15 seconds
20 seconds
0 to 24 hours
0.1 seconds
min. 10 seconds
max. 60 seconds
max. 20 seconds
10 seconds
5 minutes
5 minutes
20 seconds
0 ... seconds
0 ... seconds
0 ... seconds
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