L.B. White 400-650K Tradesman - Manuel (Page 19)

Troubleshooting
4 19
Symptom Possible Cause(s) Corrective Action
Heater ignites but MAIN PCB
assembly shuts heater off after
a short period of time.
(Indicator lamp is flickering
and room temp. display
indicates “E1”)
Heater will not ignite but motor
runs for a short period of time.
(Indicator lamp is flickering
and room temp. display
indicates “E1”)
Fan does not turn when heater
is plugged in and power switch
is in the “ON” position.
(Indicator lamp is on or
flickering)
(Indicator lamp is flickering
and room temp. display
indicates “E2”)
(Indicator lamp is flickering
and room temp. display
indicates “E3”)
Heater will not turn-on
(Indicator lamp is off)
1. Wrong pump pressure
2. Dirty fuel filter
3. Dirt in nozzle
4. Dirty photocell lens
5. Photocell assembly not properly
installed. (Not seeing the flame)
6. Bad electrical connection between
photocell and MAIN PCB assembly
7. Defective photocell
1. No fuel in tank
2. Wrong pump pressure
3. Carbon deposits on spark plug and/or
improper gap
4. Dirty fuel filter
5. Dirt in nozzle
6. Water in fuel tank
7. Bad electrical connection between
ignitor and MAIN PCB assembly
8. Ignitor wire is not attached to spark
plug
9. Defective ignitor
10. Defective solenoid valve (not opening)
1. Thermostat setting is too low
2. Bad electrical connection between
motor and MAIN PCB assembly
1. Room Temp. sensor disconnected
2. Sensor failure
Thermostat switch failure
1. See Pump Pressure Adjustment, page 17
2. Clean Fuel Filter, see page 16
3. Clean Nozzle, see page 15
4. Clean photocell lens, page 16
5. Make sure photocell boot is properly seated in bracket,
see page 16
6. Check electrical connections. See Wiring Diagram, page
18
7. Replace photocell, page 16
1. Fill tank with kerosene
2. See Pump Pressure Adjustment, page 17
3. See Spark Plug, page 15
4. See Fuel Filter, page 16
5. See Nozzle, page 15
6. Flush fuel tank with clean kerosene, page 13
7. Check electrical connections. See Wiring Diagram, page
18
8. Attach ignitor wire to spark plug
9. Replace ignitor
10. Check electrical connections and voltage to solenoid
valve. If defective, replace solenoid valve
1. Turn thermostat control knob to a higher setting
2. Check electrical connections. See Wiring Diagram, page
18
1. Reconnect sensor. See Wiring Diagram, page 18
2. Replace sensor. See Wiring Diagram, page 18
Replace Main P.C.B.
Troubleshooting Chart
8. Turn operating switch to “OFF” and allow to cool (about
10 min.). Then turn operating switch to “ON” position. 8. Temperature limit safety
device is overheated
1. Check to insure heater cord and extension cord are
plugged in. Check power supply.
2. Replace safety fuse on cover display. 1. No electrical power
2. Blown fuse