ermaf RGA 100 ACU Manual Del Usuario página 45

? Error code A. and 8 flash alternately?
The main fan does not start during the start-up
attempts.
! The pressure switch does not switch.
• Check the air hose on the pressure switch for
dirt and moisture and clean it.
• Check the pressure switch and replace it if nec-
essary.
! The main fan is not working.
• Check the relay and replace it if necessary.
! Main fan defective.
• If possible, remove the main fan and replace it.
? Error code A. and 8 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 A.8.
? Error code A. and 9 flash alternately and the
light is red?
The main fan continues to operate after the de-
vice has been switched off.
! Wiring fault.
• Check the wiring to actuate the main fan, see
page 4 (Wiring).
! The pressure switch does not switch.
• Check the air hose on the pressure switch for
dirt and moisture and clean it.
! The main fan is switched off but the pressure
switch signal does not drop.
• Check the pressure switch and replace it if nec-
essary.
! The relay to actuate the main fan is defective.
• Replace the relay.
RGA100_NF.indd 17
? Error code C. and 1 flash alternately and the
light is red after 5 minutes where applica-
ble?
Monitor temperature threshold (STM) of the safety
temperature sensor has been exceeded.
! 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 4 (Wiring).
! Safety temperature sensor is incorrectly aligned.
• Check the position of the safety temperature
sensor.
! Ambient temperature exceeded.
• The temperature is > 40°C. Allow the room to
cool.
! The safety temperature sensor is measuring an
incorrect temperature.
• Replace the safety temperature sensor.
! 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).
! Incorrect λ or O
2
• The heater is not set correctly and must be ad-
justed, see page 10 (Adjusting the heater).
! In the event of a power failure during operation,
the heater will be switched off without a cool-
ing phase. In the event of a brief power failure
(< 5 minutes), the heat exchanger will heat the
device excessively.
• Once the voltage supply has been restored, Con-
trolled air flow mode is activated. The heater is
cooled for a maximum of 1 minute.
? Error code C. and 2 flash alternately and the
light is red?
Limiter temperature threshold (STL) of the safety
temperature sensor has been exceeded.
! The cause of the fault as described above for
warning C.1 could not be rectified.
• Check the heater for damage, see page 20
(Visual inspection).
GB-17
value.
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