GB-18
D
GB
F
NL
I
E
2 1
? The display blinks and indicates
21
.
!
Inputs 51 and 52 are activated simultaneously.
•
Check input 51.
▷
Input 51 may only be activated if the valve is open.
•
Check input 52.
▷
Input 52 may only be activated if the valve is in
the position for ignition capacity.
2 2
? The display blinks and indicates
22
.
!
Actuator IC 20 has been wired incorrectly.
•
Check the wiring. Wire the outputs and inputs
of connection terminals 52 – 55 as shown in
the connection diagram – see page 9 (IC
20 connected to BCU..F1).
!
The unit has suffered an internal fault in the power
module.
•
Replace the power module.
2 3
? The display blinks and indicates
23
.
!
The butterfly valve position is not constantly sig-
nalled back to the BCU.
•
Check the wiring and ensure that the position
for max. capacity/ignition capacity/Closed of
the butterfly valve is constantly signalled back
via terminal 52.
2 4
? The display blinks and indicates
24
.
!
Faulty activation via the bus. Requirements for
“Open” and “Close” set simultaneously.
•
Ensure that “Open” and “Close” are not activated
simultaneously.
3 0
? The display blinks and indicates
30
.
!
Abnormal data change in the parameters set for
the BCU.
•
Reset the parameters to their original values using
the BCSoft software.
•
Establish the cause of the fault to avoid repeat
faults.
•
Ensure that the cables have been installed prop-
erly – see page 4 (Cable selection).
•
If the measures described above do not help,
remove the unit and return it to the manufacturer
for inspection.
3 1
? The display blinks and indicates
31
.
!
Abnormal data change in the parameters set for
the BCU.
•
Reset the parameters to their original values using
the BCSoft software.
•
Establish the cause of the fault to avoid repeat
faults.
•
Ensure that the cables have been installed prop-
erly – see page 4 (Cable selection).
•
If the measures described above do not help,
remove the unit and return it to the manufacturer
for inspection.
3 2
? The display blinks and indicates
32
.
!
Supply voltage too low or too high.
•
Operate the BCU in the specified mains voltage
range (mains v10/-15%, 50/60 Hz).
!
The unit has suffered an internal fault.
•
Remove the unit and return it to the manufacturer
for inspection.
3 3
? The display blinks and indicates
33
.
!
Faulty parameterization.
•
Check parameter settings using BCSoft.
!
The unit has suffered an internal fault.
•
Remove the unit and return it to the manufacturer
for inspection.
4
3
? The display blinks and indicates
34
.
!
Faulty actuation of the air valve.
!
The unit has suffered an internal fault.
•
Remove the unit and return it to the manufacturer
for inspection.
