SF2300 Technical Manual
Page 16
Troubleshooting
Depending on what is discovered upon initial troubleshooting of the heater system please refer to the correct
section to diagnose and correct the problem.
Heater does not attempt to start and is NOT displaying Error Codes
If the heater does not attempt to start when turned on; turn the heater OFF and back on again. Make sure
that the heat button with the 3 arrows is pressed and not the ventilation mode button.
If the heater still does not attempt start and there is not a blinking error code on the controller check the
following in this order.
1) Check that all the electrical connections are intact and not damaged or corroded.
2) Check the fuses to make sure they are not burned out.
3) Check to make sure the voltage going to the heater is not too low or high.
4) Remove power to the heater for 5 minutes or more by removing the main fuse at the battery and then
reinstall the fuse and turn the heater on to test.
5) Install and test the heater with a new controller.
6) Install a new electronic control unit into the heater and test.
Heater does attempt start but does NOT Heat or display Error Codes
If the heater does attempt to start after turning on and you have waited long enough for the heater to
complete the start attempt sequence and there is still no heat or a flashing error code check the following.
1) Determine if temperature setpoint is too low or the room temperature is too high.
Turn the temperature to the highest setpoint and turn heater on.
If the area you are working in is too hot, move the heater to a cooler place and try again.
2) Remove power to the heater for 5 minutes or more by removing the main fuse at the battery and then
reinstall the fuse and turn the heater on to test.
3) Install and test the heater with a new controller.
4) Install a new electronic control unit into heater and test.
Error Flash Codes
The SF2300 has an automatic built in error code detection system. When the heater detects a fault it will
either display it using a flashing error code on the controller or it will present a numeric fault code if the
controller has a screen. The number of flashes and the numeric value are the same. Two Flashes of the
LED on the Controller is the equivalent of getting an Error Code 02. After the error code is determined,
refer to the Error Code List and Diagnostic Chart.
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