GB-15
D
GB
NL
RUS
PL
F
E
UA
CN
3
Press the RESET button to reset. The unit then
reverts to the last operating mode selected.
▷
Possible faults:
Display
Fault type
F
Flame fault
A
Air fault
C
Temperature fault
E
Electronics fault
U
Other possible faults
4
If the burner control unit does not respond even
though all the possible faults have been rectified
as described below, contact your supplier.
? Fault
! Cause
• Remedy
?
The 7-segment display has gone out despite
the voltage supply being OK?
!
Fuse F2 is defective.
•
Check the fuse contacts.
There is a spare fuse directly next to the fuse
holder.
Attention! Fit the correct fuse for 4 A.
L
N
L
N
N
LT
LV
+T
–
+V
mA
V
1
2
L
L
i
N
1
2
+
0 V
D – 49018 Osnabrück, Germany
ACU
?
Error code
F.
and
1
flash alternately?
On burner start-up, the burner control unit has
not detected a flame during the safety time. Sev-
eral automatic start-up attempts will be com-
pleted if a restart has been programmed.
!
Inadequate inlet pressure available.
•
Check the inlet pressure.
!
Ignition is not working properly.
•
Check the connection of the ignition cables for
damage or moisture. The spark plug must be
fitted correctly.
•
Check the ignition spark acoustically during the
3-second ignition time from the burner fan side.
•
Clean the spark electrode.
•
Check the ignition transformer and replace it if
necessary.
!
Poor flame signal due to incorrect burner adjust-
ment.
•
Readjust the CO
2
value, see page 10 (Adjust-
ing the heater).
!
Poor flame signal due to dirty or badly connected
flame rod.
•
Check the flame rod and clean it with fine abra-
sive paper if necessary.
•
Check the cable connection, cable and terminal
boot for damage or moisture. The terminal boot
must be fitted correctly.
•
Check the yellow and green burner ground cable
for corrosion and to ensure it is firmly connected.
•
The flame rod is defective and must be replaced.
!
Air in the gas pipe.
•
Vent the gas pipe.
!
Valves do not open.
•
Disconnect the valve plug on the gas combina-
tion control and measure the voltage at the valve
plug during the safety time.
•
If the voltage is not adequate, first check fuse F2
(4 A). If the display and the LEDs are not lit, it is
defective.
•
If the voltage is not adequate, replace the gas
combination control and return it to the supplier.
?
Error code
F.
and
1
flash alternately and the
light is red?
The fault could not be rectified. All start-up at-
tempts have been used and the burner control
unit goes into lock-out.
▷
Reset is only possible by pressing the RESET
button on the burner control unit or using the
remote reset if there is one.
•
Rectify the cause of the fault as described above
for warning
F.1
.
? Error code
F.
and
2
flash alternately?
The flame has gone out during operation. If a
restart has been programmed, an automatic
restart will be completed.
!
Poor flame signal due to incorrect burner adjust-
ment.
•
Readjust the CO
2
value, see page 10 (Adjust-
ing the heater).
!
Poor flame signal due to dirty or badly connected
flame rod.
•
Check the flame rod and clean it with fine abra-
sive paper if necessary.
•
Check the cable connection, cable and terminal
boot for damage or moisture. The terminal boot
must be fitted correctly.
•
Check the yellow and green burner ground cable
for corrosion and to ensure it is firmly connected.
•
The flame rod is defective and must be replaced.
RGA100_NF.indd 15
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