GB-14
D
GB
F
NL
I
E
0 4 0 5
0 6
0 7
? Start-up – flame burning – nevertheless, the
display blinks and indicates
04
or
05
on the pilot
burner/burner or
06
or
07
on the main burner.
!
Flame failure on start-up.
•
Read off the flame signal.
▷
If the flame signal is lower than the switch-off
threshold (parameter 01), this may be attributable
to the following causes:
!
The set value for the cut-off sensitivity is too high.
!
Short-circuit on the flame rod as the result of
soot, dirt or moisture on the insulator.
!
Flame rod not correctly positioned at the flame
edge.
!
Gas/air ratio incorrect.
!
Flame not contacting burner ground as the result
of excessively high gas or air pressure.
!
Burner or BCU not (adequately) grounded.
!
Short-circuit or discontinuity on the flame signal
cable.
!
Soiled UV sensor.
!
UV sensor wiring is defective.
•
Remedy fault.
0 8
? Operation – flame burning – burner inter-
rupted – the display blinks and indicates
08
.
!
Flame failure during operation or during delayed
controller enable.
•
Read off the flame signal, see page 19 (Read-
ing off the flame signal, fault messages and the
parameters).
▷
If the flame signal is lower than the switch-off
threshold for the flame signal from burner 1
(parameter 01), this may be attributable to the
following causes:
!
The set value for the cut-off sensitivity is too high.
!
Short-circuit on the flame rod as the result of
soot, dirt or moisture on the insulator.
!
Flame rod not correctly positioned at the flame
edge.
!
Gas/air ratio incorrect.
!
Flame not contacting burner ground as the result
of excessively high gas or air pressure.
!
Burner or BCU not (adequately) grounded.
!
Short-circuit or discontinuity on the flame signal
cable.
!
Soiled UV sensor.
•
Remedy fault.
1 0
? The display blinks and indicates
10
.
!
Actuation of the remote reset input is faulty.
!
Too many remote resets. More than 5 resets
have been conducted within the last 15 minutes,
either automatically or manually.
!
Consecutive fault caused by a previous fault
whose actual cause has not been remedied.
•
Pay attention to previous fault messages.
•
Remedy cause.
▷
The cause will not be remedied by performing a
reset every time a fault lock-out occurs.
•
Check whether remote reset complies with
standards (EN 746 allows resetting only under
supervision) and correct if necessary.
▷
The BCU may only be reset manually under su-
pervision.
•
Press the Reset/Information button on the BCU.
1 1
? The display blinks and indicates
11
.
!
Too many restarts. More than 5 restarts initiated
within the last 15 minutes.
•
Check burner setting.
•
Press the Reset/Information button on the BCU.
2 0
? The display blinks and indicates
20
.
!
Voltage is applied to the output at terminal 56.
•
Check the wiring and ensure that the voltage
outputs and inputs have the same polarity and
are not reversed.
!
The unit has suffered an internal fault in the power
module.
•
Replace the power module.
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.
