GB-20
D
GB
F
NL
I
E
4 5
? The display blinks and indicates
45
.
!
Faulty valve actuation, reversed valve connection.
•
Check the wiring of the solenoid valves.
5 1
? The display blinks and indicates
51
.
!
Interruption of signal at the “Safety interlock/
Controller enable/Emergency stop” input (ter-
minal 46).
•
Check voltage supply to terminal 46.
5 2
? The display blinks and indicates
52
.
!
The BCU is permanently reset by remote reset.
•
Check voltage supply to terminal 3.
•
Apply voltage to terminal 3 only for reset, approx.
1 second.
5 3
? The display blinks and indicates
53
.
!
The time between two starts is less than the
min. time (timing cycle).
•
Comply with the min. timing cycle tz
min
:
tz
min
[s] = (t
VZ
+ 0.6 × t
SA1
) + 9
Example:
Pre-ignition time t
VZ
= 2 s
1
st
safety time on start-up t
SA1
= 3 s
tz
min
= (2 + 0.6 × 3) + 9 = 12.8 s
5 4
? The display blinks and indicates
54
.
!
Faulty feedback signal of the control element
position for ignition capacity.
•
Check wiring from central actuator to BCU (ter-
minal 66).
•
Check whether parameter 71 = 20 (LDS ignition
position check).
5 6
? The display blinks and indicates
56
.
!
Faulty wiring of multi-flame control. A flame signal
and an incorrect flame signal are sent to the BCU
at the same time.
•
Check the wiring.
5 7
? The display blinks and indicates
57
.
!
Faulty actuation of the input at terminal 44. The
BCU is prompted to go into menox mode, even
though there is no signal for high temperature
operation (> 750°C) at terminal 49.
•
Check the wiring.
8 9
9 9
9 5
9 6
9 8
9 4
? The display blinks and indicates
89
,
94
,
95
,
96
,
98
or
99
.
!
System fault – the BCU has performed a safety
shut-down. The cause may be a unit defect or
abnormal EMC influence.
•
Ensure that the ignition cable has been installed
properly – see page 4 (Cable selection).
•
Ensure that the EMC regulations for the sys-
tem are satisfied – particularly for systems with
frequency converters – see page 4 (Cable
selection).
•
Reset the unit.
•
Disconnect the burner control unit from the mains
supply and then switch it on again.
•
Check mains voltage and frequency.
•
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.
9 4
? The display blinks and indicates
94
.
!
The inputs are supplied with different phases of
a three-phase current system.
•
Check the wiring and ensure that the device and
the inputs are supplied with the same phase.
9 7
? The display blinks and indicates
97
.
!
No PCC.
•
Insert compatible PCC.
!
Contact problems on the power module.
•
Remedy contact problems.
!
Power module is defective.
•
Replace power module.
