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Power Supply Error
E0
If plugged in while the switch is in the "ON"
position.
Photocell (Flame Sensor) Error
Oil Shortage
Bad Photocell (Flame Sensor)
E1
Incomplete Combustion
Contamination of Fuel Filter
Ignition Failure"
Temperature sensor (Thermistor) Error
E2
Bad Connection or mis-operation of Sensor
Anti-overheating Sensor (Thermostat) Error
E3
Unusual internal overheating
Float Sensor Operation
E6
Shortage of Fuel
LO
Below 1 °F
HI
Over 99 °F
OH
It stops when the temperature reaches to 140 °F
CN
Continuously operating without set-temperature Normal
Blinking
Error during operation
Troubleshooting
Possible Cause
-8-
Corrective Action
Unplug and turn the switch to "OFF"
position. Plug in and turn switch to "ON"
Check the fuel tank (Fill the fuel if needed)
Check and clean or replace Photocell
Using Designated Fuel
Clean or replace Fuel Filter
Check Wire Connection
Check Spark Plug For Normal Firing (clean
or replace if needed)
Check Wire Connection
Replace Sensor
Restart After Cooling
Supply Fuel
Normal
Normal
Restart After Cooling
Check Error Code
Re-operating after reset
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