Code
Text display
Possible cause/check
E04.10
5 Unsuccessful burners starts detected
Five failed burner starts:
No ignition spark:
Check the wiring between the PCU electronic PCB
and the ignition transformer.
Check that the SU electronic PCB is correctly in
place.
Check the ionisation/ignition electrode.
Check breakdown to earth.
Check the condition of the burner set.
Check the earthing.
SU electronic PCB faulty: replace the electronic
PCB.
Ignition spark but no flame:
Vent the gas pipes to remove air.
Check that the air inlet and flue gas discharge
flues are not blocked.
Check whether the gas tap is properly open.
Check the gas supply pressure.
Check the operation and setting of the gas valve
unit.
Check the wiring on the gas valve unit.
SU electronic PCB faulty: replace the electronic
PCB.
Presence of the flame but insufficient ionization (<4
µA):
Check whether the gas tap is properly open.
Check the gas supply pressure.
Check the ionisation/ignition electrode.
Check the earthing.
Check the wiring on the ionization/ignition elec
trode.
E04.11
VPS Gas Valve proving failed
Gas leakage control fault:
Bad connection: check the wiring and connectors.
VPS gas leakage control defective: replace the GPS.
Gas valve unit faulty: replace the gas valve unit.
E04.12
False flame detected before burner start
False flame signal:
The burner remains very hot: Set the O
2
Ionisation current measured but no flame should be
present: check the ionisation/ignition electrode.
Faulty gas valve: replace the gas valve.
Faulty ignition transformer: replace the ignition trans
former.
E04.13
Fan speed has exceeded normal operating range
Fan fault:
Bad connection: check the wiring and connectors.
Fan operates when it should not be operating: check
for excessive chimney draught.
Faulty fan: replace the fan.
E04.14
The burner temperature and burner setpoint differ
more than a parameter defined by the GVC for more
-
E04.15
The flue gas pipe is blocked
-
E04.17
The driver for the gas valve is broken
Gas valve fault:
Bad connection: check the wiring and connectors.
Faulty gas valve: replace the gas valve.
E04.18
The flow temperature is less than the minimum defined
by the GVC parameter
-
E04.19
Mass Flow Sensor Communciation
-
E04.20
MassFlowSensor Deviation
-
12 Troubleshooting
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