GB-22
D
GB
F
NL
I
E
E
?
The display blinks and indicates
E
.
!
Internal communication with bus module has
suffered a fault.
•
Connected control elements must be equipped
with protective circuits in accordance with the
manufacturer’s instructions.
▷
This prevents high voltage peaks which can
cause malfunctioning of the BCU.
•
Use suppressed terminal boots (1 kΩ).
•
If the fault cannot be remedied by doing this,
remove the unit and return it to the manufacturer
for inspection.
!
The bus module is defective.
•
Replace the bus module.
?
The display blinks and indicates
.
!
Incorrect or defective parameter chip card (PCC).
•
Only the intended parameter chip card is to be
used.
•
Replace defective parameter chip card.
1
?
The display blinks and indicates
1
.
!
No input signal for the valve proof of closure
switch (POC) during standby.
•
Check the wiring.
▷
Mains voltage must be supplied to the BCU (ter-
minal 45) if the valve is closed and no voltage is
to be applied if the valve is open.
•
Check that the proof of closure switch and valve
function perfectly, replace defective valves.
8
?
The display blinks and indicates
8
.
!
The BCU is receiving no information as to wheth-
er the POC switch contact is still open.
•
Check the wiring.
•
During start-up, mains voltage must be supplied
to the BCU (terminal 45) if the valve is closed and
no voltage is to be applied if the valve is open.
•
Check that the proof of closure switch and valve
function perfectly, replace defective valves.
F 1
? The display blinks and indicates
F1
.
!
One of the external flame detectors detects an
extraneous signal (an incorrect flame signal).
•
Eliminate extraneous signal.
!
Incorrect voltage supply to terminal 67.
•
Check voltage supply to terminal 67.
!
Parameter 45 has been set incorrectly.
•
Check whether multi-flame control is required.
If not, set parameter 45 to 0.
F 2
? The display blinks and indicates
F2
.
!
One of the external flame detectors does not
detect a flame signal during the safety time.
•
Check voltage supply to terminal 68.
F 3
? The display blinks and indicates
F3
.
!
One of the external flame detectors does not
detect a flame signal during the flame proving
period.
•
Check voltage supply to terminal 68.
F 4
? The display blinks and indicates
F4
.
!
One of the external flame detectors does not
detect a flame signal during operation.
•
Check voltage supply to terminal 68.
0
? The display blinks and indicates
0
.
!
No connection established between BCU
and PLC.
•
Check the wiring.
•
Check the PLC program to ensure that the net-
work name and IP configuration of the BCU are
valid.
•
Switch on the PLC.
1
? The display blinks and indicates
1
.
▷
Fault occurs on devices with fieldbus communi-
cation with address check (P80 = 1) only.
!
An invalid or incorrect address has been set on
the bus module.
•
Assign the correct address (001 to FEF) to the
bus module.