ermaf TR 75 - Page 14

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• Check the cable connection, cable and plug for
damage or moisture. The plug must be fitted
correctly.
• Check the yellow and green burner ground cable
for corrosion and to ensure it is firmly connected.
• The ionization electrode is defective and must
be replaced.
! Air in the gas pipe.
• Vent the gas pipe.
! Valves do not open.
• Disconnect the valve plug on the gas combina-
tion control and measure the voltage at the valve
plug during the safety time.
• If the voltage is not adequate, first check fuseF2
(4A). If the display and the LEDs are not lit, it is
defective.
• If the voltage is not adequate, replace the gas
combination control and return it to the supplier.
? Fault code F. and 1 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F.1.
? Fault code F. and 2 flash alternately?
The flame has gone out during operation. If a
restart has been programmed, an automatic
restart will be completed.
! Poor flame signal due to incorrect burner adjust-
ment.
• Readjust the CO
2
value, see page9 (Adjust-
ing the heater).
! Poor flame signal due to dirty or badly connected
ionization electrode.
• Check the ionization electrode and clean it with
fine abrasive paper if necessary.
• Check the cable connection, cable and plug for
damage or moisture. The plug must be fitted
correctly.
• Check the yellow and green burner ground cable
for corrosion and to ensure it is firmly connected.
• The ionization electrode is defective and must
be replaced.
? Fault code F. and 2 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F.2.
? Fault code F. and 3 flash alternately?
The burner control unit detects a flame signal
during start-up or in fault status.
! Incorrect flame signal due to leakage/creepage
current.
• Check the wiring, see page4 (Wiring).
• Check the ionization electrode.
! Incorrect flame signal through conductive ce-
ramic insulation, e.g. surge via PE wire, possible.
• Remedy incorrect flame signal. Replace the
ionization electrode 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.
? Fault code A. and 3 flash alternately and the
light is red?
The fault could not be rectified after four auto-
matic start-up attempts. All start-up attempts
have been used and the burner control unit goes
into lock-out.
! This air filter is not OK.
• Check the air filter and clean it if necessary, see
page11 (Cleaning).
▷ Reset is only possible by pressing the RESET
button on the burner control unit or using the
remote reset if there is one.