Program Status On Last Fault - Honeywell Krom Schroeder BCU 480 Manual

Parameters
Restart in the event of flame failure
Parameter 13 = 1: Restart in the event of flame failure.
1x
08 05 06
>2 s
t
t
SB
t
W2
If the BCU detects a flame failure after a minimum op-
erating time of 2 s, valve V2 is closed and the operation
signalling contact is opened within time t
The burner control unit now attempts to restart the
main burner once. If the burner does not function, a
fault lock-out occurs. The display blinks and shows the
cause of the fault.
In accordance with EN 746-2, a restart may be con-
ducted only if the safety of the installation is not im-
paired. Restart is recommended for burners which oc-
casionally display unstable behaviour during operation.
The precondition for a restart is that activation of the
restart allows the burner to restart as intended (in all
operating phases). In this case, it must be ensured that
BCU 480 · Edition 03.16l
07 08
t
SA2 FS2
.
SB
the program sequence started by the BCU matches the
application.

4 .6 .4 Program status on last fault

Parameter 03
88
1
This indicates the program status in which the last
5
4
1
burner fault occurred.
7
12
V1
9 1 Example: the unit indicates that the safety interlocks
16-17
1
have been interrupted with a blinking 51 .
21
2
14
V2
24
2
Parameter 03 can now be used to scan in what program
28-29
2
18-19
status the BCU was when the fault was detected.
t
47