ICM Controls SC 1901 Installation, Operation & Application Manual Download

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Troubleshooting

Symptom

Remedy

The system isn’t turning on

Check the wiring (see Installation, Page 4)

LCD is blank

Check the wiring (see Installation, Page 4)

Thermostat is not properly controlling the fan

Check the wiring (see Installation, Page 4)

Thermostat is continuously turning on and off

Increase the temperature differential (see Setting a New Temperature
Differential, Page 6)

Temperature display is not accurate

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

Summary of Contents for SC 1901

Page 1: ...ion Application Guide For more information on our complete range of American made products plus wiring diagrams troubleshooting tips and more visit us at www icmcontrols com Controls Single Stage Cool...

Page 2: ...on 3 To Remove Existing Thermostat 4 To Install Thermostat 4 Replacing Wiring Labels 5 Operation 6 A Quick Test 7 Wiring Diagram 8 Troubleshooting 9 CAUTION This thermostat should be installed by trai...

Page 3: ...Parts Diagram Mode Switch Fan Switch Celsius Fahrenheit Jumper Reset Button Auto On Off Cool...

Page 4: ...power outage SET ROOM DIFF Temperature differential setting Room temperature Room temperature setpoint Always turn off the thermostat before installing removing cleaning or servicing Turn off the pow...

Page 5: ...r Protection for air conditioners to protect the A C s compressor there is a 5 minute delay between the system turning off and the A C starting 30 minute power loss memory retention Package includes S...

Page 6: ...mostat ELECTRICAL SHOCK HAZARD Turn off power at the main service panel by removing the fuse or switching the appropriate circuit breaker to the OFF position before removing the existing thermostat IM...

Page 7: ...ther wires 11 Tighten screws on terminal block Gently tug wire to be sure of proper connection Double check that each wire is connected to the proper terminal 12 Seal hole for wires behind thermostat...

Page 8: ...on and off too frequently increase the temperature differential Step 1 Remove cover and press the Reset button once Step 2 For the first 10 seconds of operation the temperature differential is displa...

Page 9: ...system and fan should turn on Action Set the Mode switch to Off Result The A C should turn off There may be a fan delay Action Set the Fan switch to On continuous indoor fan operation Result The blow...

Page 10: ...Wiring Diagrams Cooling Only 4 Wire Single Transformer 24 VAC T H E R M O S T A T R C Y G 120 VAC HOT Transformer Cooling Only Fan Control...

Page 11: ...Page 4 Thermostat is continuously turning on and off Increase the temperature differential see Setting a New Temperature Differential Page 6 Temperature display is not accurate Your thermostat has two...

Page 12: ...er to permit the Seller to properly administer the warranty the Buyer shall 1 Notify the Seller promptly of any claim submitting date code information or any other pertinent data as requested by the S...