Viessmann MatriX Service Instructions For Contractors page 30

Flow diagram
Burner control unit flow diagram
Phase Display Description
Relay test "P" Fan ramp-up for test
Safety relay test
Disable relays BV1 and BV2.
Relays test BV1 and BV2
Ignition relay test
Disable safety relay.
Start-up meter, initialisation
Standby "0" Standby
Start-up "1" Flame signal amplifier test
Gas fan and air pressure switch test
"2" Fan ramp-up
"3" Pre-purge
Adjusting start-up load, test WD 1
"4" Pre-ignition
"5" Ignition safety time
Flame detection safety time
Operation "6" Flame stabilising time
"7" Start-up, partial load
Modulating operation
Adjust shutdown load.
Shutdown "8" Reheat, test WD 2
Fan ramp-up, post-purge
Post-purge
Waiting "U" Waiting for restart
"C" Waiting for mains gas pressure
Fault "9" Forced ventilation fault
states
"10" Flame tear-off
"11" Safety shutdown
"F" Fault shutdown
30
(cont.)
Duration
max. 20 s
0.9 s
0.9 s
0.9 s
0.9 s
0.9 s
0.1 s
0 ... s
max. 50 s
max. 20 s
max. 20 s
10 s
1.9 s
2 s
2.3 s
max.
0.51 s
15 s
20 s
0 to 24 h
0.1 s
min. 10 s,
max. 60 s
max. 20 s
10 s
1 min
5 min
20 s
0 ... s
0 ... s
0 ... s