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A Quick Test

CAUTION!

Do not switch system to cool if the outdoor temperature is below 50°F (10°C). This can 
damage the air conditioning system and may cause personal injury.

  

Action:

  Set the 

Mode 

switch to 

Cool

.  Press the   button until the temperature setting is 3°F below the 

room temperature. 

 

Result:

 The A/C 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 blower fan should turn on. 

Action:

  Set the 

Fan 

switch to 

Auto

 

Result:

 The blower fan should turn off.

If the above test was successful, you have a proper installation. 

If not:

 

Double check that wires are securely connected and are connected to the proper terminals. Consult 

the troubleshooting section (see Page 9).

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...

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