Beckett 12Vdc SDC Manual page 14

Section: Troubleshooting
Table 3. Troubleshooting Chart
Symptom Possible Cause
If the burner is not igniting, the burner motor, drive coupling, and oil pump are operating and oil is
fl owing to the nozzle through the solenoid valve, check the following possibilities.
1. Check the air shutter adjustment. If the air shutter is opened too far, the fl ow of air may prevent the arc from
reaching the oil spray. This may appear as a white vapor exhaust from the heater.
Oil Not
up burner and set combustion"]
Igniting
2. The ignition system may have failed to supply an adequate arc to ignite the oil. Check the battery and
charging system to insure a continuous supply of 11 to 16 volts DC (15 amps).
Assembly Maintenance"]
3. Check the electrodes for wear and damage. Insure that the electrodes are adjusted properly.
section "Nozzle Assembly Maintenance"]
If there is no fl ame, the burner motor and igniter operate continuously and the oil solenoid valve is
functional, check the following possibilities.
1. Check for a plugged oil nozzle. [Refer to section 3]
2. If the coil on the solenoid valve is actuating, insure that the valve is opening or closing properly.
section "Fuel Supply"]
No Flame
3. Check for suffi cient fuel pressure. Pressure is 100 psig with valve energized, unless otherwise noted.
[Refer to section "Drive Component Maintenance"]
4. Check the pump pressure. Check for air in fuel lines.
5. Check burner for broken motor coupling. If the coupling is broken check pump rotation prior to replacing the
coupling.
6. Check for contaminated fuel and/or partially plugged fuel fi lter.
If the blower motor is not operating, check the following possibilities.
1. Check voltage at the motor to insure that switches and relays, in line with the motor, are operating properly.
Motor Not
[Refer to section "Burner Wiring"]
Operating
2. Check pump and motor shaft operation. They should work freely without binding.
Component Maintenance"]
If the blower motor is operating, there is fuel in the tank, but oil does not spray out the end of the
nozzle, check the following possibilities.
1. Check for a broken or stripped coupling between the pump and the motor.
Component Maintenance"]
No Oil Spray
2. Check the pump output for oil.
3. Check operation of the oil valve.
4. Check for a plugged nozzle.
5. Check for air in the oil line.
6. Check for fuel contamination or plugged fi lter.
If the pump pressure, as determined by a pressure gauge, is erratic or does not exist, check the
following possibilities.
1. Check motor rotational speed. Low rpm can cause erratic or no pump pressure.
Fluctuating
Component Maintenance"]
or No Pump
2. Check for a broken or worn motor coupling.
Pressure
3. Check that the pump turns freely.
4. Check for air leaks in the lines.
5. Check for oil froth at the bleed point.
6. Check voltage at the motor.
7. Check for fuel contamination or partially plugged fi lter.
If the blower motor is not operating at the rpm's listed on the nameplate, check the following.
Slow Motor
1. Check the supply voltage to the motor.
Rotation
2. Check for free operation of the motor shaft and pump assembly.
Maintenance"]
14
[Refer to section "Drive Component Maintenance"]
[Refer to section "Drive Component Maintenance"]
[Refer to section "Drive Component Maintenance"]
[Refer to section "Nozzle Assembly Maintenance"]
[Refer to section "Nozzle Assembly Maintenance"]
[Refer to section "Drive Component Maintenance"]
[Refer to section "Fuel Supply"]
[Refer to section "Fuel Supply"]
[Refer to section voltage rating on nameplate]
[Refer to section "Fuel Supply"]
[Refer to section "Nozzle Assembly Maintenance"]
[Refer to section "Drive Component Maintenance"]
[Refer to section voltage rating on nameplate]
[Refer to section "Drive Component
[Refer to section "Start
[Refer to section "Nozzle
[Refer to
[Refer to
[Refer to section "Drive
[Refer to section "Drive
[Refer to section "Drive