GB-18
D
GB
F
NL
I
E
▷
Device name on delivery:
not-assigned-bcu-570-xxx
(
xxx
= code switch setting on the BCU).
▷
The device name must at least consist of the
expression
bcu-570-xxx
.
•
Check whether the code switch setting is identi-
cal to the entry (xxx) in the PLC program.
•
Delete the expression “
not-assigned-
” in the
PLC program or replace it with an individual name
part (e.g. Furnacezone1-).
4
?
The display blinks and indicates
4
.
!
The PLC is set to Stop.
•
Start the PLC.
Replacing the fuse
▷
The device fuses F1 and F2 can be removed
for inspection.
Disconnect the system/BCU from the electrical
power supply.
Disconnect the connection terminals from the
BCU.
▷
The connection cables may remain screwed to
the connection terminals.
Disconnect the power module, see page 3
(Replacing the power module/parameter chip
card).
4
Remove the fuse holder (with fine-wire fuse F1
or F2).
F1:T3,15A H
F2:T5A H
5
Check fine-wire fuse F1 or F2 for correct func-
tioning.
6
Replace the fine-wire fuse if defective.
▷
When replacing the fuse, use only the approved
fuse type (F1: 3.15 A, slow-acting, H, F2: 5 A,
slow-acting, H; pursuant to ICE 60127-2/5).
•
First reconnect the power module, then recon-
nect the connection terminals and restart the
system/BCU, see also page 12 (Commis-
sioning).
1
2
7
3
5
4
6
8
9
?
The display blinks and indicates
0
,
1
,
2
,
3
,
4
,
5
,
6
,
7
,
8
or
9
.
!
The signal for monitoring the min. gas pressure
(terminal 49) has dropped out at program step X
(00 to 09).
•
Check the wiring.
•
Check the gas pressure.
A
?
The display blinks and indicates
A
.
!
No “Position for minimum capacity reached”
signal from actuator.
•
Check the butterfly valve and the function of the
limit switches in the actuator.
•
Check the wiring.
•
Check the actuator.
•
If the fault cannot be remedied by doing this,
remove the unit and return it to the manufacturer
for inspection.
A
?
The display blinks and indicates
A
.
!
No “Position for maximum capacity reached”
signal from actuator.
•
Check the butterfly valve and the function of the
limit switches in the actuator.
•
Check the wiring.
•
Check the actuator.
•
If the fault cannot be remedied by doing this,
remove the unit and return it to the manufacturer
for inspection.
A
?
The display blinks and indicates
A
.
!
No “Position for ignition capacity reached” signal
from actuator.
•
Check the butterfly valve and the function of the
limit switches in the actuator.
•
Check the wiring.
•
Check the actuator.
0
