AXE 3 D UNIT 32 R HR
17
EN
cod. 3541B310 - 10/2011 (Rev. 00)
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 22 - fig. 1) indicating the fault
code.
There are faults that cause permanent shutdown (marked with the letter "
A
"): to restore
operation just press the
RESET
button (detail 8 - fig. 1) for 1 second or RESET on the
optional remote timer control if installed; if the boiler fails to restart, it is necessary to elim-
inate 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 boiler's normal working range.
Table of faults
Table. 2 - List of faults
5. TECHNICAL DATA AND CHARACTERISTICS
5.1 Dimensions, connections and main components
fig. 21 - Front view
fig. 22 - Side view
fig. 23 - Rear view
a4 =
Flue - Ø 120/130”
10 =
System delivery 3/4”
11 =
System return 3/4”
14 =
Safety valve
32 =
Heating circulating pump
36 =
automatic air vent
56 =
Expansion tank
246 =
Pressure transducer
275 =
Heating system drain cock
278 =
Double sensor ( Heating)
295 =
Burner
338 =
Fume recuperator
Fault
code
Fault
Possible cause
Cure
A01
Burner shutdown
Pump blocked
Replace
Faulty electric motor
Replace
Faulty oil valve
Replace
No fuel in tank, or water on bottom
Refill with fuel or suck the water
Oil line supply valves closed
Open
Dirty filters (line-pump-nozzle)
Clean
Pump unprimed
Prime and find the cause of
unpriming
Ignition electrodes dirty or not properly
adjusted
Adjust or clean them
Nozzle clogged, dirty or deformed
Replace
Unsuitable head and shutter adjustments Adjust
Electrodes faulty or earthed
Replace
Faulty ignition transformer
Replace
Electrodes faulty or earthed
Replace
Electrode wires deformed by high tem-
perature
Replace and protect
Faulty valve or transformer electrical con-
nections
Check
Broken pump-motor joint
Replace
Pump inlet connected to return pipe
Correct the connection
Faulty photoresistance
Replace
Dirty photoresistance
Clean the photoresistance
A02
Flame present signal
with burner off
Photoresistance short circuit
Replace photoresistance
Extraneous light strikes the photoresist-
ance
Eliminate light source
A03
Overtemperature pro-
tection activation
Heating sensor damaged
Check correct positioning and
operation of the heating sensor
No water circulation in the system
Check the circulating pump
Air in the system
Vent the system
F07
Preheater fault
Preheater fault
Check the preheater
Wiring disconnected
Check the wiring
F10
Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the
sensor
Wiring shorted
Wiring disconnected
F11
DHW sensor fault
Sensor damaged
Check the wiring or replace the
sensor
Wiring shorted
Wiring disconnected
F14
Delivery sensor 2 fault
Sensor damaged
Check the wiring or replace the
sensor
Wiring shorted
Wiring disconnected
F34
Supply voltage under
170V.
Electric mains trouble
Check the electrical system
F35
Faulty mains fre-
quency
Electric mains trouble
Check the electrical system
F37
Incorrect system water
pressure
Pressure too low
Fill the system
Sensor damaged
Check the sensor
F39
External probe fault
Probe damaged or wiring shorted
Check the wiring or replace the
sensor
Probe disconnected after activating the
sliding temperature
Reconnect the external probe or
disable the sliding temperature
F40
Incorrect system water
pressure
Pressure too high
Check the system
Check the safety valve
Check the expansion tank
A41
Sensor positioning
Delivery sensor not inserted in boiler shell
Check correct positioning and
operation of the heating sensor
F42
Heating sensor fault
Sensor damaged
Replace the sensor
F47
System water pressure
sensor fault
Wiring disconnected
Check the wiring
500
850
32
295
275
930
278
246
36
14
338
275
10
11
a4
10
11
90
52
210
680
336
295
56
Summary of Contents for AXE 3 D UNIT 32 R HR
Page 31: ......
