DeDietrich AGC 10/15, Инструкция по установке и обслуживанию, Страница: 113 / 132

Code Faults Cause
of the
fault Description Checking / solution
L16 PARASIT FLAME
PCU Detection of a parasite flame Ionization current present when there should not be a
flame
Ignition transformer defective
4
Check the ionization/ignition electrode
Gas valve defective
4
Check the gas valve and replace if necessary
The burner remains very hot: CO
2
too high
4
Set the CO
2
L17 VALVE FAIL
PCU Problem on the gas valve SU PCB faulty
4
Inspect the SU PCB and replace it if need be
L34 FAN FAILURE
PCU The fan is not running at the
right speed
Bad connection
4
Check the wiring between the PCU PCB and the
fan
Fan defective
4
Check for adequate draw on the chimney
connection
4
Replace the fan if need be
L35 BACK>BOIL FAIL
PCU Flow and return reversed Bad connection
4
Check that the sensor has been correctly fitted
Sensor fault
4
Check the Ohmic value of the sensors
4
Replace the sensor if necessary
Water circulation direction reversed
4
Check the circulation (direction, pump, valves)
L36 I-CURRENT FAIL
PCU The flame went out more than
5 times in 24 hours while the
burner was operating
No ionization current
4
Purge the gas supply to remove air
4
Check that the gas valve is fully opened
4
Checking the gas supply pressure
4
Check the operation and setting of the gas valve
unit
4
Check that the air inlet and flue gas discharge flues
are not blocked
4
Check that there is no recirculation of flue gases
L37 SU COM.FAIL
PCU Communication failure with the
SU PCB
Bad connection
4
Check whether the SU PCB has been correctly
fitted into the connector on the PCU PCB
4
Change the SU PCB
L38 PCU COM.FAIL
PCU Communication failure
between the PCU and SCU
PCBs
Bad connection
4
Check the wiring between the PCU and SCU PCBs
4
Run an
AUTODETECTION
in the menu
#CONFIGURATION
SCU PCB not connected or faulty
4
Replace the SCU PCB
AGC 10/15 - AGC 15 - AGC 25 - AGC 35 8. Troubleshooting
20/01/2012 - 300026081-001-B 111