Troubleshooting - Fer FERSYSTEM TECH 31 C Instructions For Use, Installation And Maintenance

FERSYSTEM TECH 31 C

3.4 Troubleshooting

Fault Diagnosis
In the event of operating problems or trouble, the display will flash and a fault identification code
appears.
There are faults that in order to restore operation the RESET button must be pressed (ref.6 - fig. 1); or
if the boiler fails to start, it will be necessary to repair the fault (code nos. F1 to F24). Other faults cause
temporary shutdowns that are automatically reset as soon as the value comes back within the boiler's
normal working range (codes from 25 to 47).
When the boiler starts functioning normally again, the display stops flashing and the fault code disap-
pears.
Fault
A01
No burner ignition
A02
Flame detected with the burner off
A03
High limit protection
A04
Flue gas fault
A05
Fan problem
No fl ame after the ignition phase (6
A06
times in 4 min.)
A41
Flow sensor disconnected
F07
Flue gas fault
F10
Flow sensor fault
F11
Return sensor fault
Possible cause
No gas
Detection or ignition electrode fault
Defective gas valve
Incorrect inlet gas pressure
Siphon obstructed
Ionisation electrode defective
Main board defective
Flow temperature sensor not active
or correctly located
No system circulation
Fault F07 happened 3 times in the
last 24 hours
Tachometer signal interrupted for 1
hour or longer
Detection electrode fault
Flame unstable
Incorrect valve gas Offset
Flue gas circuit obstructed
Siphon obstructed
Sensor disconnected
The exhaust gases temperature
becomes higher than 95°C for 2
minutes.
Sensor damaged or short circuited
Sensor damaged or wiring broken
Sensor da maged or wiring shorted Check the wiring or change the sensor
Sensor damaged or wiring broken
Cod. 3540U320 - 09/2009 (Rev. 00)
Cure
Check the regular gas fl ow to the boiler and the air
has been purged from the pipes.
Check that the electrodes are correctly positioned
and free of any deposits
Check and change the gas valve
Check inlet gas pressure
Check and if necessary change the siphon
Check the ionizing electrode wiring
Check the PCB
Check the correct positioning and operation of the
fl ow sensor
Check the pump and radiator valves present in the
system
Check operation of the internal by-pass
Check the fl ue
Check the wiring and the fan
Check that the electrode is correct positioned and if
necessary change it
Check the burner
Check Offset at the minimum power
Check if fl ue gas circuit is free
Check and if necessary change the siphon
Check the correct position and operation of the fl ow
sensor
Check the fl ue
Check the wiring or change the sensor
Check the wiring or change the sensor
Check the wiring or change the sensor
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