Troubleshooting - ICM Controls SC 2000 Installation, Operation & Maintenance Manual

Symptom
The system isn't turning on
LCD is blank, or displaying "LO BAT"
Thermostat is not properly controlling the fan
Thermostat is continuously turning on and off
Temperature displayed is not accurate

Troubleshooting

Check the wiring (see Installation, Page 4)
Check the batteries
Replace batteries, or make sure the existing ones are properly installed
(see Installing and Changing Batteries, Page 6)
Check that the fan switch setting matches your system (gas or
electric)
Increase the temperature differential (see Setting a New Temperature
Differential, Page 7)
Your thermostat has two options for temperature readout: Fahrenheit
(default) or Celsius; check that the "jumper" is properly set to your
preference
Plug the hole for wiring behind the thermostat with non-flammable
insulation to prevent airflow into the thermostat
Remedy