GB-19
D
GB
F
NL
I
E
•
If the fault cannot be remedied by doing this,
remove the unit and return it to the manufacturer
for inspection.
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.
Reading off the flame signal, fault
messages and the parameters
▷
During operation (display
08
), information about
the flame signal intensity, the last 10 fault mes-
sages and the parameter values can be read
off by repeatedly pressing the Reset/Informa-
tion button.
Display
Information
F1
Flame signal intensity:
burner 1
E0
to
E9
Last fault message
to
tenth to last fault message
01
to
99
Parameter 01
to
parameter 99
•
Press the Reset/Information button for approx.
2 s until the display indicates
F1
.
•
Release the button. The display indicates the
flame signal intensity in µA.
•
Press the Reset/Information button again for
2 s to go to the next item of information (fault
message, parameter value).
▷
Each time the button is released, the correspond-
ing fault code or parameter value is displayed.
▷
To go to one of the last fault messages or to a
parameter more quickly, hold the Reset/Infor-
mation button pressed down for longer (≥ 2 s).
▷
If the button is pressed only briefly, the display
indicates what parameter is currently being dis-
played.
▷
The normal program status is displayed again
approx. 60 seconds after the last time the but-
ton is pressed.
Parameters and values
Pa-
ram-
eter
Name
Values
01
Burner 1 flame signal switch-off threshold
2 – 20
= µA
04
Flame control
0
= Ionization
1
= UVS
2
= UVD
07
Burner 1 start-up attempts
1
= 1 start-up attempt
2
= 2 start-up attempts
3
= 3 start-up attempts
09
Restart
0
= No
1
= Burner 1 restart
4
= Max. 5 burner 1 restarts in 15 minutes
10
Emergency stop
0
= Off
1
= With fault lock-out
2
= With safety shut-down
