ermaf GP 95 ACU Instrucciones De Utilizacion página 36

Assistance in the event of
malfunction
WARNING
To avoid harm to persons and animals or damage
to the heater, please observe the following:
– Electric shocks can be fatal! Before working
on possible live components, ensure the unit
is disconnected from the power supply.
– Fault-clearance must only be undertaken by
authorized trained personnel!
– Repairs to components, e.g. the burner control
unit ACU or the combination control CG, may
only be carried out by the manufacturer. Other-
wise, the guarantee will be cancelled. Unauthor-
ized repairs or incorrect electrical connections,
e.g. the connection of power to outputs, can
cause gas valves to open and the burner control
unit to become defective. In this case, fail-safe
operation can no longer be guaranteed.
– (Remote) resets may only be conducted by
authorized trained personnel with continuous
monitoring of the devices concerned.
▷ In the event of an installation fault, the burner
control unit closes the gas valves and the status
indicator light will be red at the latest after a
restart has been unsuccessful.
▷ The 7-segment display will show an error code
in the form of a letter with a decimal point and
a number alternately indicating a warning. To-
gether with the red status indicator light, this
then constitutes a fault.
▷ Warnings and faults may be cleared only using
the remedies described below.
Internal wiring
▷ To rectify a fault, it is sometimes necessary to
check the internal wiring.
1 Open the housing cover of the burner control
unit.
2 Undo the two screws (M3) using a Phillips screw-
driver and remove the complete plastic cover
from the burner control unit.
GP_95_ACU_NF.indd 12
Internal connection diagram
Safety temperature limiter (STL)
Not used
Not used
Ignition
Valves
Vane
Gas pressure switch
Ionization
Not used
Not used
Not used
Main fan
GB-12
13.09.20 22:52