Honeywell Krom Schroeder BCU 480 - Program Status and Fault Messages

BCU 480 · Edition 03.16l 27
Function
3.5 Program status and fault messages
Program status
DISPLAY
Fault message (flashing)
BCU 480
BCU 480..B1
BCU switched off
– –

Start-up position/Standby
00
 
Purge
P0
 
Waiting time/Pause time
1
Flame simulation
 
Safety time on start-up, pilot burner
2
Start-up without flame signal, pilot burner
 
Flame proving period, pilot burner
3
Flame failure during flame proving period, pilot burner
 
Operation, pilot burner
4
Flame failure during operation, pilot burner
 
Waiting time, main burner
5
Flame simulation, main burner
 
Safety time on start-up, main burner
6
Start-up without flame signal, main burner
 
Flame proving period, main burner
7
Flame failure during flame proving period, main burner
 
Operation, main burner
8
Flame failure during operation, main burner
 
10
Too many remote resets
 
Air valve
A
 
Pre-ventilation
A1
 
Post-ventilation
A0
 
Cooling
A0
 
0
Air pressure switch “no flow” state
 
P
No air flow during purge
 
X
No air flow in position X
 
High temperature operation
. .
 
P
Bus fault

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