ermaf GP 95 ACU Instrucciones De Utilizacion página 39

• 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).
GP_95_ACU_NF.indd 15
? 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
page 3 (Wiring).
! 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
page 2 (Installation).
! 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
(Maintenance).
GB-15
13.09.20 22:53