Code
Display text
Description
Solution
E.04.10
Unsuccessful start
5 Unsuccessful burners starts detec
ted
Five failed burner starts:
No ignition spark:
Check the wiring between the CU-GH and
the ignition transformer
Check the ionisation/ignition electrode
Check breakdown to earth
Check the condition of the burner cover
Check the earthing
Replace the CU-GH
Ignition spark but no flame:
Vent the gas pipes to remove air
Check that the air supply inlet and flue gas
outlet are not blocked
Check that the gas valve is fully opened
Check the gas supply pressure
Check the operation and setting of the gas
valve unit
Check the wiring on the gas valve unit
Replace the CU-GH
Flame present, but ionisation has failed or is in
adequate:
Check that the gas valve is fully opened
Check the gas supply pressure
Check the ionisation/ignition electrode
Check the earthing
Check the wiring on the ionisation/ignition
electrode.
E.04.11
VPS
VPS Gas Valve proving failed
Gas leakage control fault:
Bad connection: check the wiring and connec
tors
Gas leakage control VPS faulty: Replace the
valve proving system (VPS)
Gas valve unit faulty: Replace the gas valve
unit
E.04.12
False flame
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
transformer
E.04.13
Fan
Fan speed has exceeded normal op
erating range
Fan fault:
Bad connection: check the wiring and connec
tors.
Fan operates when it should not be operating:
check for excessive chimney draught
Faulty fan: replace the fan
E.04.14
Combustion Error
The burner temperature and setpoint
differ more than 60s regarding GVC
configuration
-
E.04.15
FlueGas Pipe Blocked
The flue gas pipe is blocked
Flue gas outlet is blocked:
Check that the flue gas outlet is not blocked
Restart the boiler
E.04.17
GasValve Driver Err.
The driver for the gas valve is bro
ken
Gas valve unit fault:
Bad connection: check the wiring and connec
tors
Faulty gas valve unit: Replace the gas valve
unit
10 Troubleshooting
7701838 - v.09 - 10122021
55
