Troubleshooting Guide; Wiring Diagram - Lavor PT70-SS Plus User's Manual & Operating Instructions

Problem
Heater fires, but shuts down after
a short period of time. LED dis-
play shows "E1".
Heater will not operate, or motor
runs for short time. LED display
shows "E1".
Fan does not operate when heat-
er is plugged in and Operating
Switch is in the "ON" position.
LED display shows "E1" or "E2".
LED display shows "E3"
Heater makes grinding noise.
Heater does not turn on and the
lamp is not lit.
Poor combustion and / or soot
production.
© 2020, Lavorwash
NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR WHILE
CONNECTED TO A POWER SOURCE

Troubleshooting Guide

Possible Cause
1. Dirty Fuel Filter.
2. Nozzle Dirty.
3. Photocell Dirty.
4. Photocell not installed properly.
5. Photocell Defective .
6. Improper electrical connec-
tion between Circuit Board and
Photocell.
7. Cooling Fan is obstructed
1. No kerosene/ diesel in fuel tank.
2. Corroded Spark Plug or incor-
rect plug gap.
3. Dirty Fuel Filter.
4. Dirty Nozzle.
5. Moisture in Fuel/Fuel Tank.
6. Improper electrical connec-
tion between Transformer and
Circuit Board.
7. Transformer Wires not connect-
ed to Spark Plug.
8. Defective Transformer.
1. Broken electrical connection
between Circuit Board and
motor.
2. Not enough amps available to
power heater.
1. Thermostat switch has failed.
1. Air in fuel pump.
1. Temperature limit sensor has
overheated.
2. No electrical power.
3. Fuse break down.
4. Improper electrical connection
between Temperature Limit
Sensor and Circuit Board.
1. Pump Pressure.
2. Poor fuel quality.
1. Clean/replace Fuel Filter.
2. Clean/replace Nozzle
3. Clean/replace Photocell .
4. Adjust Photocell position.
5. Replace Photocell.
6. Check wiring connections (See Wiring
Diagrams, Page 14).
7. Check to be sure cooling fan is not
obstructed.
1. Fill tank with fresh kerosene/ diesel.
2. Clean/replace Spark Plug.
3. Clean/replace Fuel Filter.
4. Clean/replace Nozzle.
5. Rinse out fuel tank with clean fresh paraf-
fin/ diesel.
6. Inspect all electrical connections. (See
Wiring Diagrams, Page 14).
7. Re-attach Transformer wires to Spark Plug.
8. Replace Transformer.
1. Inspect all electrical connections on Wiring
Diagrams (Page 14).
2. Use a new extension cord or try another
electrical socket.
1. Replace thermostat switch (see wiring
diagram on page 14)
1. Sound will stop after 3 seconds. If grinding
sound continues, add fuel to tank.
1. Push Operating Switch to "OFF" and
allow heater to cool for 5 minutes. Push
Operating Switch back to "ON".
2. Check power cord and extension cord to
insure of proper connection. Test power
supply.
3. Check/replace Fuse.
4. Inspect all electrical connections. (See
Wiring Diagrams, Page 14).
1. Be sure pump pressure is adjusted cor-
rectly.
2. Be sure kerosene/ diesel is not old or
contaminated.
Diesel Fired Radiant Heater User's Manual
13
Solution