www.desatech.com
114909-01A
6
POSSIBLE CAUSE
1. Ignitor is not functioning
2. Faulty flame control
3. Non-functioning photoelectric
cell
4. Fuel is not reaching the burner
or a sufficient amount is not
arriving
5. Solenoid valve is not working
1. Insufficient air for combustion
2. Too much air for combustion
3. Fuel is dirty or contains water
4. Air has filtered into the fuel
circuit
5. Inadequate quantity of fuel in
burner
6. Too much fuel in burner
1. Faulty fan thermostat
SOLUTION
1. A) Check the connections
of the ignition cables to the
electrodes and transformer
B) Check the position of the
electrodes and the distance
between them, in accordance
with the diagram on page 7
C) Check that the electrodes
are clean
D) Replace the ignition
transformer
2. Replace the flame control
3. Clean or replace the photo-
electric cell
4. A) Check that the connection
between the pump and the
motor is intact
B) Check that air has not fil-
tered into the fuel circuit, check
the tubes and the filter seal
C) Clean or, if necessary,
replace the nozzle
5. A) Check the electrical con-
nection
B) Check the LI thermostat
C) Clean or, if necessary,
replace the solenoid valve
1. A) Remove anything block-
ing or obstructing the aspira-
tion and/or airflow ducts
B) Check the position of the
air regulation ring
C) Clean the burner disc
2. Check the position of the air
regulation ring
3. A) Replace the fuel with
clean fuel
B) Clean the fuel filter
4. Check the condition of the
tubes and the seal of the fuel
filter
5. A) Check the pump pressure
B) Clean or replace the nozzle
6. A) Check the pump pressure
B) Replace the nozzle
1. Replace the solenoid valve
1. Replace the FA thermostat
OBSERVED FAULT
The fan comes on but the
flame does not light or does
not remain lit
The fan comes on and the flame
lights, but produces smoke
The heater does not turn off
The fan does not switch off
TROUBLESHOOTING
Continued
