•
Undo the screw 5 to remove the baffl e and screw 6 to remove the electrodes.
Propercleaning of the nozzle is obtained by removing the fi lter and cleaning the
slots andspraying hole with petrol, rinsing it with fuel oil. When reassembling
everything, payattention to the correct positioning of the electrodes-baffl e.
Condensate tank
To access the condensate tank, open the lower cover (Fig. 35).
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler
fault, the display will fl ash together with the fault symbol (9 - fi g.1) indicating the
faultcode.
There are faults the cause permanent shutdowns (marked with the letter "A"): to
restoreoperation, just press the RESET button (3 - fi g.1) for 1 second or use the RE-
SET on the remote timer control (optional) if installed; if the boiler does not restart, it
is necessary to eliminate the fault indicated in the operation LEDs.
Other faults cause temporary shutdowns (marked with the letter "F") which are
automatically reset as soon as the value returns within the boiler's normal working
range.
Circulating pump diagnostics
Some faults linked to the circulating pump are signalled by the LED located around
thespeed selector (fi g.38).
EN
38
fi g.36
fi g.37
fi g.38
KYRA D 30 SI UNIT COND
Table. 3 - List of faults
Fault
Fault
Possible cause
code
Pump blocked
Faulty electric motor
Faulty oil valve
No fuel in tank, or water on
bottom
Oil line feed valves closed
Dirty fi lters (line-pump-nozzle) Clean
Pump unprimed
Ignition electrodes not proper-
ly adjusted, or dirty
Nozzle clogged, dirty or
deformed
Unsuitable head and shutter
adjustments
A01
Bloqueo del quemador
Faulty electrodes or earthed
Faulty ignition transformer
Faulty electrode wires or
earthed
Electrode wires deformed by
high temperature
Faulty valve or transformer
electrical connections
Broken pump-motor joint
Pump inlet connected to
return pipe
Faulty photoresistance
Dirty photoresistance
Photoresistance short circuit
Flame present signal
A02
with burner off
Extraneous light strikes the
photoresistance
Heating sensor damaged
Overtemperature
A03
protection activation
No water circulation in the
system
Air in the system
A04
Card parameter fault
Wrong card parameter setting
Preheater fault (the
Preheater failure
F07
contact does not close
Wiring disconnected
in 120 seconds)
A09
Card parameter fault
Wrong card parameter setting
Sensor damaged
F10
Delivery sensor 1 fault
Wiring shorted
Wiring disconnected
Sensor damaged
F11
DHW sensor fault
Wiring shorted
Wiring disconnected
F12
Card parameter fault
Wrong card parameter setting
Sensor damaged
F14
Delivery sensor 2 fault
Wiring shorted
Wiring disconnected
F16
Card parameter fault
Wrong card parameter setting
Supply voltage under
F34
Electric mains trouble
170V.
F35
Faulty mains frequency
Electric mains trouble
Pressure too low
Incorrect system water
F37
pressure
Sensor damaged
Probe damaged or wiring
shorted
F39
External probe fault
Probe disconnected after acti-
vating the sliding temperature
Incorrect system water
F40
Pressure too high
pressure
Delivery sensor not inserted
A41
Sensor positioning
in boiler shell
F42
Heating sensor fault
Sensor damaged
System water pressure
F47
Wiring disconnected
sensor fault
Cure
Replace
Replace
Replace
Refi ll with fuel or suck
the water
Open
Prime and fi nd the cause
of unpriming
Adjust or clean them
Replace
Adjust
Replace
Replace
Replace
Replace and protect
Check
Replace
Correct the connection
Replace
Clean the photoresis-
tance
Replace the photore-
sistance
Eliminate the light source
Check the correct posi-
tioning and operation of
the heating sensor
Check the circulating
pump.
Vent the system
Check the card para-
meter and modify it if
necessary
Check the preheater
Check the wiring
Check the card para-
meter and modify it if
necessary
Check the wiring or
replace the sensor
Check the wiring or
replace the sensor
Check the card para-
meter and modify it if
necessary
Check the wiring or
replace the sensor
Check the card para-
meter and modify it if
necessary
Check the electrical
system
Check the electrical
system
Fill the system
Check the sensor
Check the wiring or
replace the sensor
Reconnect the external
sensor or disable the
sliding temperature
Check the system
Check the safety valve
Check the expansion
vessel
Check the correct posi-
tioning and operation of
the heating sensor
Replace the sensor
Check the wiring
A73022660