GB
2
FAULT
Motor does not start
Motor runs, but the
heater does not ignite
and after a short time locks
out
Flames come out of air
outlet
Heater starts, fl ame lights
up, but
fl ame-out control system
shuts off the appliance
CAUSE
No power or low voltage
Faulty or damaged power cord
Faulty motor/capacitor
Lock-out of appliance due to overheating
Empty fuel tank, of dirty or wrong fuel
Fuel fi lter clogged
Leaks in Fuel line
Burner nozzle clogged
Diesel viscosity increased due to low
temperature
Insuffi
cient air fl ow into combustion
chamber
Pump pressure too high
Dirty photocell
Faulty photocell
Defective connection between
photocell and fl ame-out control
Faulty fl ame-out control
REMEDY
Check power line and voltage
Check fuse and replace if necessary
Check power cord -
Replace power cord
Check and if necessary replace
Detect the cause of overheating
Shut the appliance down
Check air inlet and outlet
Wait some minutes and restart the appliance
If necessary apply to the Professional Technical Service
Remove wrong or dirty fuel
Fill the tank with clean Diesel or Paraffi
n.
Clean or replace fuel fi lter
Check pipes, tighten connections, if necessary replace
Clean nozzle blowing compressed air, replace if necessary
Mix Diesel with 10-20%
Paraffi
n
Check fan
Check pump air pressure
Reduce air pressure to nominal value
Check photocell and be sure that it acknowledges the fl ame
Clean photocell lens
Replace photocell
Check and connect properly
Check and replace if necessary
7. TROUBLE-SHOOTING
The maintenance operations written in boldface must be carried out only by a Professional Technical Service.
Air Filters (ill. 2)
• Clean the air fi lter regularly, especially if the appliance is used in du-
sty environments. Remove fi lter end cover (1), wash air intake fi lter
(2) using a light detergent and dry it thoroughly before reinstalling.
Replace air delivery fi lter (4) at least once a year.
Ignition Electrodes (ill.3)
• Clean, adjust and if necessary replace ignition electrodes every 300
hours of functioning. For electrode gap see illustration.
Pump Pressure Adjustment
• Remove pressure gauge plug from fi lter end cover. Install a pressure
gauge with a precision of at least 0.02 bar. Start heater and read air
pressure value. If necessary adjust pressure as follows:
Model
Air Pump Pressure (bar)
14.5
kW 0.30
15 kW
0.28 - 0.32
23 kW
0.26 - 0.33
26 kW
0.30 - 0.35
28 kW
0.30 - 0.36
38.5
kW 0.34
43 kW
0.30 - 0.39
61.3
kW
0.34
Compressor Blades
• Every 1500 operation hours check the height of compressor blades.
• Replace blades if the blade height is less than 11.5 mm.
Lock-out
• In case of defective
ignition or overhea-
ting the fl ame-out
control system shuts
the heater off . If this
occurs:
a) detect and rectify the
cause of lock-out. In
particular the air inlet
and outlet sections
should not be ob-
structed and the fan
should rotate freely.
b) turn switch to “OFF” (0).
c) wait a few minutes to let the heater cool.
d) turn switch to “ON”(I).
• If the cause of lock-out cannot be detected please shut the applian-
ce down and call a Qualifi ed Technical Service.
Shut-down
• Turn switch to “OFF”(0).
6. MAINTENANCE
• The maintenance operations described in this chapter must
be carried out only by a Professional Technical Service.
• Use only original spare parts.
Fan
• Clean fan using a cloth moistened with paraffi
n or light solvent.
Dry fan thoroughly using compressed air. Clean fan blades at least
every 500 hours of functioning.
Nozzle
• Carefully remove nozzle from the nozzle adapter. Blow compressed
air through the face of nozzle to free any dirt.
