Fault Lock-Out Or Restart, Main Burner - Honeywell Krom Schroeder BCU 480 Manual

Parameters

4 .6 .3 Fault lock-out or restart, main burner

This parameter determines whether the BCU starts a
one-off restart or performs an immediate fault lock-out
for the main burner after a flame failure (see also Pro-
ject planning information).
Immediate fault lock-out in the event of flame
failure
Parameter 13 = 0: Main burner fault lock-out.
08 08
t
SB
After a flame failure, the burner control unit performs
a fault lock-out within the safety time during operation
t . This involves disconnecting the power from the gas
SB
valves and the ignition transformer. The fault signalling
contact closes, the display blinks and shows the current
program status, see table on page 27 (Program sta-
tus and fault messages).
BCU 480 · Edition 03.16l
After a fault lock-out, the burner control unit can be
reset, either with the button on the front panel or using
an external button. Several burner control units can be
reset in parallel using the external button.
The BCU cannot be reset by mains failure. The fault
signalling contact does, however, open as soon as the
mains voltage fails.
See also page 54 (Behaviour of the air valve in the
event of a fault lock-out).
▼
88
1
5
4
1
7
12
V1
9 1
16-17
1
21
2
14
V2
24
2
28-29
2
18-19
t
46