Troubleshooting - Ferroli MIKRO P7 Instructions For Use, Installation & Maintenance

Checks on parts and components
Fan
Make sure no dust has accumulated inside the fan and on the blades: it reduces the air
flow, thus causing pollutant combustion.
Combustion head
Make sure all parts of the combustion head are intact, not warped by the high tempera-
ture, free of impurities coming from the room, and correctly positioned.
Photoresistance
Remove any dust on the glass. The photoresistance is press-on; to remove, pull it out-
wards.

4.4 Troubleshooting

The burner is equipped with an advanced self-diagnosis system. In case of a burner
anomaly, the display (Detail 7 - fig. 19) flashes indicating the fault code.
There are faults that cause permanent shutdowns (marked with the letter "A"): to restore
operation press the button "P" (Detail 5 - fig. 19) for 1 second; if the burner fails to start,
it is necessary to firstly eliminate the fault.
Other faults cause temporary shutdowns (marked with the letter "F") which are automat-
ically reset as soon as the value returns within the burner's normal working range.
Table. 3 - List of faults
Code Fault Cause
Pellet container empty
Auger cable broken or disconnected
No ignition shut- Faulty igniter resistance
A01
down
Combustion head dirty
Pellet feed duct obstructed
Parasite flame The demand for heat has ended, but the
F02
elimination burner detects flame
Photoresistance short circuit
Shutdown for par-
A02
Extraneous light strikes the photoresist-
asite flame
ance
Incorrect ignition parameters
Auger safety ther-
A04
mostat block Boiler under pressure
Faulty safety thermostat
Pressure sensor connection tube
squashed
Faulty pipe pres-
F05
sure adjustment Fan motor damaged
Fan dirty
Pressure trans-
F06 ducer fault (dis- Wiring disconnected
connected)
Sensor damaged
Boiler shell probe
F10 Wiring shorted
fault (if enabled)
Wiring disconnected
A03 Wiring fault Jumper of terminals 13-14 not connected Check the wiring
16
EN
Cure
Fill the container with pellets
Restore the connection
Replace and empty the head of pellets
Empty and clean it
Free it, make sure the combustion head is
not clogged and empty it if necessary
Wait for end of post-ventilation
Replace the photoresistance
Eliminate light source
Check the transparent parameters 03=51
and 04=12
Clean it and check correct minimum flue
draught (10Pa)
Replace it
Replace
Replace
Clean it
Check the wiring or replace the sensor
Check the wiring or replace the sensor
cod. 3540T986 - 04/2012 (Rev. 00)
MIKRO P7 - P12