ermaf GP 95 ACU Instrucciones De Utilizacion página 38

? Error code A. and 3 flash alternately?
! The vane switch has not switched on 15 s after
the fan has been switched on.
• Vane, fan or grille are dirty. Clean, see page 18
(Maintenance).
• Fuse F1 defective (8 A, slow-acting, H). Check
the function of the fan and replace fuse F1 if
necessary.
! Motor defective.
• Remove the device and return it to the supplier.
? Error code A. and 3 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.
• Check that the vane switch is functional. Clean
the vane, fan or grille if soiled.
? Error code F. and 1 flash alternately?
! On burner start-up, the ACU has not detected
a flame during the safety time. In the parameter
"Number of start-up attempts", it is possible to
program up to three start-up attempts. If one
of the further start-up attempts is successful,
warning signalling stops automatically once the
post-purge time has elapsed.
! Ignition is not working properly.
• Clean the spark electrode and check for correct
distance, see page 18 (Maintenance).
• Check the connection of the ignition cables for
damage or moisture.
▷ The spark plug must be fitted correctly.
• Check the ignition spark optically and acoustically
from the fan side during the 4-second ignition
time.
! Poor flame signal due to incorrect burner adjust-
ment.
• Readjust gas pressure p
justing the heater).
! Poor flame signal due to dirty/badly connected
flame rod.
• Clean the flame rod and check for correct dis-
tance, see page 18 (Maintenance).
GP_95_ACU_NF.indd 14
, see page 8 (Ad-
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• 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.
! Air in the gas pipe.
• Vent the gas pipe.
! Valves do not open.
• Remove the valve plug on the combination con-
trol CG and measure the voltage between L1
and N during the safety time. If the voltage is
not adequate, first replace the CG and return it
to the supplier.
Attention! Only commission the new ACU once
the short-circuit or fault on the valve output of
the CG has been remedied. Otherwise, the new
ACU will be damaged.
• If the fault continues to be signalled, there may
be a short-circuit on the valve output. Return
the burner control unit to the manufacturer for
inspection.
! Short-circuit on ignition output.
• Replace fine-wire fuse F2 (3.15 A, slow-acting,
H) and check the safety function, see page 20
(Checking the safety functions and burner opera-
tion).
? Error code F. and 1 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.1.
? Error code F. and 2 flash alternately?
! The flame has gone out during operation. If a
restart has been programmed, an automatic re-
start is carried out provided that the burner has
been in operation for at least 2 s beforehand.
• Poor flame signal due to incorrect burner adjust-
ment. Readjust gas pressure p
(Adjusting the heater).
• Poor flame signal due to dirty or badly connected
flame rod. Clean the flame rod and check for
correct distance, see page 18 (Maintenance).
• Check the cable connection for damage or mois-
ture. The terminal boot must be fitted correctly.
, see page 8
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