DeDietrich AFC 30 User Manual page 39

AFC 18 - AFC 24 - AFC 30
Code Faults
L30 DEF.FLUE GAS
PRESSURE
L31 DEF.SMOKE.TEMP
L32 DEF.OUTLET S.
L33 DEF.OUTLET S.
L34 BACK S.FAILURE
L35 BACK S.FAILURE
L36 DEF.FLAME LOS
L37 SU COM.FAIL
L38 PCU COM.FAIL
L39 BL OPEN FAIL
L250 DEF.WATER MIS.
L251 MANOMETRE FAIL
D03 OUTL S.B FAIL.
D04 OUTL S.C FAIL.
15/07/2015 - 300026440-05
Cause Description
of the
fault
PCU The flue gas pressure switch
opened 5 times in 24 hours.
PCU The maximal smoked temperature
is exceeded of 5 times in 24 hours.
PCU The boiler flow sensor has short-
circuited
PCU The boiler flow sensor is on an open
circuit
PCU The return temperature sensor has
short-circuited
PCU The return temperature sensor is
on an open circuit
PCU 3 flame losses during a heating
demand
PCU Communication breakdown with
the safety box
PCU Communication failure between the
PCU and SCU PCBs
PCU The BL inlet opened for a short time Bad connection
PCU The water pressure is too low
PCU Fault on the water pressure sensor Wiring problem
SCU Circuit B flow sensor fault
Circuit C flow sensor fault
Remarks:
The circuit pump is running.
The 3-way valve motor on the
circuit is no longer powered and can
be adjusted manually.
Checking / solution
Contact the professional who takes care of
4
maintenance of the appliance
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
SCU PCB not connected or faulty
Contact the professional who takes care of
4
maintenance of the appliance
External cause
Parameter incorrectly set
Contact the professional who takes care of
4
maintenance of the appliance
Hydraulic circuit incorrectly vented
Water leak
Measurement error
Top up with more water if necessary
4
Reset the boiler
4
Failure water pressure switch
Sensor pcb defect
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
7. Troubleshooting
38