GB-15
D
GB
NL
RUS
PL
F
E
UA
CN
•
Check the yellow and green burner ground cable
for corrosion and to ensure it is firmly connected.
?
Error code
F.
and
2
flash alternately and the
light is red?
!
The fault could not be rectified. The programmed
number of start-up attempts having failed, the
ACU initiates a fault lock-out.
•
Reset using the RESET button on the ACU or
via the remote reset.
•
Rectify the cause of the fault as described for
warning
F.2
.
?
Error code
F.
and
3
flash alternately and the
light is red?
!
The burner control unit detects a flame signal
during start-up or in fault status.
!
A gas valve does not close correctly.
•
Shut off the gas supply to the device. Check the
burner and gas valves for correct function, see
page 20 (Checking the safety functions and
burner operation).
!
Incorrect flame signal due to leakage/creepage
current.
•
Check wiring, see page 3 (Wiring).
•
Check the flame rod.
!
Incorrect flame signal through conductive ce-
ramic insulation, e.g. surge via PE wire, possible.
•
Remedy incorrect flame signal. Replace the flame
rod and, if necessary, also the complete burner
control unit and housing.
▷
Reset is only possible by pressing the RESET
button on the burner control unit or using the
remote reset if there is one.
?
Error code
F.
and
4
flash alternately and the
light is red?
!
The flame has not gone out within 5 s of the
burner being switched off. A gas valve does not
close correctly.
•
Shut off the gas supply to the device. Check the
burner and gas valves for correct function, see
page 20 (Checking the safety functions and
burner operation).
? Error code
C.
and
1
flash alternately and the
light is red after 5 minutes?
!
Signal from safety temperature monitor (STM).
Temperature has been exceeded.
•
Leave heater to cool down for longer.
!
The main fan does not switch on.
•
Check the main fan.
!
Wiring fault.
•
Check the wiring to actuate the main fan, see
!
The safety temperature monitor (STM) is incor-
rectly aligned.
•
Check the position of the safety temperature
monitor (STM).
!
Ambient temperature exceeded.
•
The temperature is > 40°C. Allow the room to
cool.
!
The safety temperature monitor (STM) is measur-
ing an incorrect temperature.
•
Replace the safety temperature monitor.
!
The heater is badly soiled.
•
The heater must be cleaned urgently.
!
Installation position.
•
The heater is too close to other heaters, see
!
Device incorrectly set.
•
The heater is not set correctly and must be ad-
justed, see page 8 (Adjusting the heater).
!
In the event of a power failure during operation,
the heater will be switched off without a cool-
ing phase. If the power failure lasts less than
5 minutes, the combustion chamber will heat
the device and the STL will issue a signal.
•
In this case, Controlled air flow mode is activated.
If the heater has been successfully cooled within
1 minute, it will restart.
? Error code
C.
and
2
flash alternately and the
light is red?
!
Signal from safety temperature limiter (STL).
Temperature has been exceeded.
!
The cause of the fault as described above for
fault
C.1
could not be rectified.
•
Check the heater for damage, see page 18
