GB-17
D
GB
F
NL
I
E
•
If the measures described above do not help, the
unit has probably suffered a hardware defect –
remove the unit and return it to the manufacturer
for inspection.
0
? The display blinks and indicates
0
.
!
The “no flow” state check of the air or differential
pressure switch has failed.
•
Check the function of the air pressure switch.
Before the fan is switched on, there must be no
high signal at the input for air monitoring (termi-
nal 47) when air monitoring is activated.
•
Check the function of the differential pressure
switch. When the fan is switched off, the “no
flow” state (default position) of the differential
pressure switch (terminal 48) is also monitored
if air flow monitoring has been activated.
1
? The display blinks and indicates
1
.
!
The operating check of the air pressure switch
has failed. The air monitor, depending on the
parameter setting for input 47 or 48 (P15 and
P35), has not switched after fan start-up.
•
Check the air monitor wiring.
•
Check the air pressure switch setpoint.
•
Check the function of the fan.
P
? The display blinks and indicates
P
.
!
The input signal (terminal 48) for the air pressure
switch has dropped out during pre-purge.
•
Check the air supply during the purging process.
•
Check the electrical wiring of the air pressure
switch.
•
Check voltage supply to terminal 48.
•
Check the air pressure switch setpoint.
2
3
8
4
6
5
7
9
? The display blinks and indicates
2
,
3
,
4
,
5
,
6
,
7
,
8
or
9
.
!
The input signal for the air pressure switch has
dropped out during start-up/operation at pro-
gram step X (02 to 09).
!
Failure of the air supply at program step X.
•
Check the air supply.
•
Check the air pressure switch setpoint.
2
3
8
4
6
5
7
9
?
The display blinks and indicates
2
,
3
,
4
,
5
,
6
,
7
,
8
or
9
.
!
The signal for monitoring the max. gas pressure
(terminal 50) has dropped out at program step X
(02 to 09).
•
Check the wiring.
•
Check the gas pressure.
0
?
The display blinks and indicates
0
.
!
BCU waiting for connection to PLC.
•
Check whether the PLC is switched on.
•
Check the network wiring.
•
Check the PLC programming.
•
Check whether the correct device name and
IP address for the BCU have been entered in
the PLC program.
1
?
The display blinks and indicates
1
.
!
An invalid address has been set on the bus mod-
ule.
•
Adapt the bus module’s address with the code
switches to the address allocated in the PLC pro-
gram.
•
Check whether the bus module’s address is in
the permitted address range (001 to FEF).
2
?
The display blinks and indicates
2
.
!
The bus module has received an incorrect con-
figuration from the PLC.
•
Check whether the correct GSD file was imported
into the PLC.
3
?
The display blinks and indicates
3
.
!
The device name for the BCU is invalid in the
PLC program.
