NINFA 32 MC
3.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler anomaly, the display will flash to-
gether with the fault symbol (detail 22 - fig. 1) indicating the fault code.
There are faults that cause permanent shutdowns (marked with the letter "A"): to restore operation just turn the selector
(detail 3 - fig. 1) to RESET (detail 8 - fig. 1) for 1 second or by means of the RESET on the Remote Timer Control (op-
tional) if installed; if the boiler fails to start, it is necessary to eliminate the fault indicated by the operation LEDs.
Faults marked with the letter "F" cause temporary shutdowns that are automatically reset as soon as the value returns
within the normal boiler operation range.
Table. 5 - Fault list
Code
Fault
fault
A01
Burner does not light
Flame present signal with burner
A02
off
Overtemperature protection
A03
intervention
Fume thermostat intervention
(after intervention of the fume
F04
thermostat, boiler operation is
inhibited for 20 minutes)
A06
No flame after the ignition phase
F10
Delivery 1 sensor fault
F11
DHW circuit sensor fault
F14
Delivery 2 sensor fault
F34
Supply voltage under 170V.
F35
Mains frequency fault
F37
Incorrect system water pressure
F39
External sensor fault
A41
Sensor positioning
F42
Heating sensor fault
Exchanger protection interven-
F43
tion.
F50
Modureg fault
GB
Possible cause
No gas
Ignition/detection electrode fault
Faulty gas valve
Lighting power too low
Electrode fault
Card fault
Heating sensor damaged
No water circulation in the system
Air in the system
Fume thermostat contact open
Wiring disconnected
Flue not correctly sized or obstructed
Low pressure in the gas system
Burner minimum pressure setting
Sensor damaged
Wiring shorted
Wiring disconnected
Sensor damaged
Wiring shorted
Wiring disconnected
Sensor damaged
Wiring shorted
Wiring disconnected
Electric mains trouble
Electric mains trouble
System empty
Water pressure switch not con-
nected or damaged
Probe damaged or wiring shorted
Sensor disconnected after activating
the sliding temperature
Delivery sensor disconnected from
the pipe
Sensor damaged
No H
O circulating in system
2
Air in the system
Wiring disconnected
cod. 3540G380 - 02/2007 (Rev. 00)
Cure
Check the regular gas flow to the boiler and that the air has
been eliminated from the pipes
Check the wiring of the electrode and that it is correctly posi-
tioned and free of any deposits
Check and replace the gas valve
Adjust the lighting power
Check the ionisation electrode wiring
Check the card
Check correct positioning and operation of the heating sen-
sor
Check the circulating pump
Vent the system
Check the thermostat
Check the wiring
Replace the flue
Check the gas pressure
Check the pressures
Check the wiring or change the sensor
Check the wiring or change the sensor
Check the wiring or change the sensor
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
Check the wiring or change the sensor
Reconnect the external sensor or disable the sliding temper-
ature
Check correct positioning and operation of the heating sen-
sor
Change the sensor
Check the circulating pump
Vent the system
Check the wiring
47