GB-13
D
GB
F
NL
I
E
▷
If the Reset/Information button is pressed, the
current step in Manual mode is shown. After
the button has been held for 1 second, the next
step will be shown. The BCU now executes its
program sequence until the display indicates
08
.
BCU 570..F with IC 0
▷
Following controller enable (display
0.8.
), actuator
IC 20 can be opened and closed as required.
Press the Reset/Information button.
▷
If the button continues to be held down, the
actuator opens further until it reaches the posi-
tion for maximum capacity.
▷
The display indicates
A.1.
with blinking dots.
▷
Once the button has been released, the butterfly
valve stops in the relevant position.
Press the Reset/Information button again.
▷
If the button continues to be held down, the
actuator closes further until it reaches the posi-
tion for minimum capacity.
▷
The display indicates
A.0.
with blinking dots.
▷
A change of direction takes place each time the
button is released and pressed again. When the
butterfly valve has reached its final position, the
dots disappear.
BCU 570..F with IC 40, BCU 570..F with
RBW or frequency converter
▷
Following controller enable (status display
0.8.
),
it is possible to move between the positions for
maximum and minimum capacity on a binary
basis.
Assistance in the event of
malfunction
DANGER
Electric shocks can be fatal! Before working on
possible live components, ensure the unit is discon-
nected from the power supply.
Fault-clearance must only be undertaken by author-
ized trained personnel.
▷
Faults may be cleared only using the measures
described below.
▷
If the BCU does not respond even though all
faults have been remedied: remove the unit and
return it to the manufacturer for inspection.
?
Faults
!
Cause
•
Remedy
? The 7-segment display does not light up.
!
Mains voltage is not applied.
•
Check the wiring, apply mains voltage (see type
label).
0 1
? The display blinks and indicates
01
.
!
The BCU has detected an incorrect flame signal
without the burner having been ignited (extrane-
ous signal).
•
Direct the UV sensor exactly at the burner to be
monitored.
!
The UV tube in the UV sensor is defective (service
life ended) and issues a continuous flame signal.
•
Exchange UV tube, Order No.: 04065304 – note
the Operating instructions for the UV sensor.
!
Flame signal through conductive ceramic insula-
tion.
•
Increase value of parameter 01 in order to adapt
the switch-off threshold of the flame amplifier.
0 4
? Start-up without flame – no ignition spark –
the display blinks and indicates
04
.
!
The ignition cable is too long.
•
Shorten it to 1 m (max. 5 m).
!
Gap between spark electrode and burner head
is too great.
•
Adjust gap to max. 2 mm.
!
Ignition cable has no contact in the terminal boot.
•
Screw the cable on firmly.
!
Ignition cable has no contact in the ignition trans-
former.
•
Check the connection.
!
Ignition cable has short-circuited to ground.
•
Check installation, clean the spark electrode.
•
If the fault cannot be remedied by doing this,
remove the unit and return it to the manufacturer
for inspection.
? Start-up without flame – no gas supply – the
display blinks and indicates
04
.
!
A gas valve does not open.
•
Check the gas pressure.
•
Check voltage supply to the gas valve.
!
There is still air in the pipe, e.g. after installation
work has been carried out or if the system has
not been in operation for a long period.
•
“Purge” the pipeline and reset the BCU.
•
If the fault cannot be remedied by doing this,
remove the unit and return it to the manufacturer
for inspection.
