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Symptom

Remedy

No display

Check for 24 VAC at thermostat; display is blank when 24 VAC is not present
Time and day of week must be reset after extended power loss

System fan does not come on properly

Verify wiring is correct, check Gas/Electric Configuration (see Setting 6, Page 12)

All thermostat buttons are inoperative

Verify 24 VAC is present; unit locks out when 24 VAC is not present

No response with first button press

First button press activates backlight only

Program schedule activates at the wrong 

time

Check time (AM/PM) set on thermostat (see Setting the Time, Page 22)

Thermostat turns on and off too 

frequently

Adjust temperature differential (see Configuration Mode Settings 2 & 3, Page 10)

Thermostat does not follow program

Verify it is operating in program mode (PROG displays); check time (AM/PM); 

check if in 2 hour program override

Fan runs continuously

Press FAN (right) button to turn fan off

Fan turns on occasionally

Program Mode: Check programmable fan setting in program schedule  

(see Page 24)

Status indicator light not on during call

Turn status indicator function on (see Configuration Mode Setting 15, Page 15)

Room temperature is not correct

Calibrate thermostat (see Configuration Mode Setting 11, Page 14) 
If remote sensor is used, check S1 and S2 terminal connections

displays when any button is pressed

Thermostat has the button lockout function activated (see Lockout Feature, Page 

25 and Configuration Mode Setting 8, Page 13)

on display instead of room 

temperature

Check for a bad connection at S1 and S2 terminals, if used (see Configuration 

Mode Setting 13, Page 14)

Heat or Cool not coming on

Verify wiring is correct, gently pull on each wire to verify there is a good 

connection at terminal block

Problem not listed above

Press Reset button once*

* Reset Button Function

  Time and day are reset, configuration and program settings are unchanged .

Troubleshooting

Summary of Contents for SC 5811

Page 1: ... visit us at www icmcontrols com 7 Day 5 2 Day or 5 1 1 Day Programmable Configurable 2 Stage Heat 2 Stage Cool Systems 2 Stage Heat Pump Systems Large Display With Backlight Selectable Fahrenheit or Celsius Compatible with Gas Oil or Electric SimpleSet Field Programming Status Indicator Light Relay Outputs minimum voltage drop in thermostat Remote Sensor Compatible Ideally Suited for Residential ...

Page 2: ... backup 6 Dual Compressor heat pump with electric backup 6 Remote Sensor Installation Optional 7 Terminal Designator Descriptions 8 SC5811 Output Chart 8 Configuration Mode 9 Configuration Mode Settings 10 Mode of Operation 16 Button Functions 17 Operating Modes 18 Testing the Thermostat 21 Setting the Time and Day of the Week 22 Programming 23 Lockout Feature 25 Factory Preprogramming 26 Personal...

Page 3: ... Parts Diagram Configuration switch Reset switch Left system button Right fan button Down button Up button Field programming pins S1 S2 R C W O B G Y1 W2 Y2 RESET CONFIG FP ...

Page 4: ...18 30 VAC 1 amp maximum per terminal 3 amp maximum total load Temperature control range 45 F to 90 F 7 C to 32 C Accuracy 1 F 0 5 C System configurations 2 stage heat 2 stage cool heat pump gas oil electric Timing Anti short Cycle 4 minutes bypass anti short cycle delay by returning to OFF mode for 5 seconds Backlight Operation 10 seconds Terminations S1 S2 R C W O B Y1 W2 Y2 G ...

Page 5: ...ing codes Do not use air conditioning when the outdoor temperature is below 50 degrees this can damage your A C system and cause personal injuries Use this thermostat only as described in this manual To Remove Existing Thermostat 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...

Page 6: ...gh the wire opening in the base of the thermostat 4 Mark the placement of the mounting holes 5 Set thermostat base and cover away from working area 6 Using a 3 16 drill bit drill holes in the places you have marked for mounting 7 Use a hammer to tap supplied anchors in mounting holes 8 Align thermostat base with mounting holes and feed the control wires through slit in thermal intrusion barrier an...

Page 7: ... Wiring Diagrams 120 VAC 24 VAC Heat 1 Cool 1 Heat 2 Cool 2 Fan Transformer Heat Cool Systems Optional remote or outdoor sensor outdoor sensor only reads outdoor temperature ...

Page 8: ... pump with electric backup Dual Compressor heat pump with electric backup 120 VAC 24 VAC Reversing Valve Compressor 1 Emergency Heat Fan Compressor 2 Transformer Optional remote or outdoor sensor Transformer Optional remote or outdoor sensor outdoor sensor only reads outdoor temperature ...

Page 9: ...erminal on the thermostat and the S1 terminal on the remote sensor Wire 2 should run between the S2 terminal on the thermostat and the S2 terminal on the remote sensor Connect the shielding of the wire to the S2 terminal on the thermostat 5 Configure the thermostat to operate with the remote indoor sensor see Configuration Mode setting 13 Page 14 or use it for an outdoor sensor Note Remote or outd...

Page 10: ...ssor heat pump systems G Fan Terminal Designator Descriptions 1ST Cool 2ND Cool 1ST Heat 2ND Heat Heat Cool Y1 G YI Y2 G W1 G W1 W2 G Heat Pump One Compressor Y1 G O Y1 G O Y1 G B Y1 W2 G B Heat Pump Two Compressors Y1 G O Y1 Y2 G O Y1 G B Y1 Y2 G B Emergency Heat Heat Pump Only N A N A W2 G W2 G G not energized when configured as a gas oil system The SC5811 thermostat is configurable for all syst...

Page 11: ...NFIG switch for 1 second Press the up or down button to change settings within each screen Down button Up button Press the right button to advance to the next screen Note Pressing the left button will return you to the previous screen Left button Right button The configuration mode is used to set the SC5811 to match your heating cooling system The SC5811 functions with heat pump air conditioning g...

Page 12: ...1 F to 5 F 0 5 C to 2 5 C Set the number of degrees between your setpoint temperature and your turn on temperature Press the up or down button to set differential value Press the right button to advance to the next screen 3 2nd Stage Temperature Differential 1 F to 5 F 0 5 C to 2 5 C Set the number of degrees between when stage 1 turns on and when stage 2 turns on Press the up or down button to se...

Page 13: ...ependently 0 outputs off simultaneously Press the up or down button to set Press the right button to advance to the next screen 5 Minimum Deadband 1 F to 9 F 1 C to 5 C Set the minimum separation between heat setpoint and cool setpoint in Auto Changeover Mode Press the up or down button to set deadband value Press the right button to advance to the next screen ...

Page 14: ...compressors in your system Press the up or down button to select Press the right button to advance to the next screen Choose System Reversing Valve Active Number of Compressors or Compressor Stages Type of Heat Heat Pump HP O 1 HP b 1 HP O 2 HP b 2 Non Heat Pump Heat Gas Heat Electric ...

Page 15: ...OL HEAT lockout allows adjustment of the set temperatures to the maximum heat set temperature selected in Step 9 and minimum cool set temperature selected in Step 10 Note The mode cannot be changed when the thermostat is locked Press the up or down button to select Press the right button to advance to the next screen 9 Maximum Heat Setpoint 45 F to 90 F 7 C to 32 C Adjust to control the maximum he...

Page 16: ...cted Press the up or down button to select Press the right button to advance to the next screen 12 Maximum Cycles Allowed Per Hour 2 6 as many as needed 2 6 maximum cycles hour Press the up or down button to select Press the right button to advance to the next screen 11 Room Temperature Offset 9 F to 9 F 4 5 C to 4 5 C Adjust to calibrate displayed room temperature to match actual room temperature...

Page 17: ...us indicator on with second stage Press the up or down button to select Press the CONFIG button for 2 seconds to exit configuration OFF 14 Cooling Fan Delay Off Time 0 30 60 90 seconds Select the fan purge time for cooling Press the up or down button to select Press the right button to advance to the next screen ...

Page 18: ...pressor come on for 4 minutes after it turns off This protects your compressor The SC5811 has five possible operating modes OFF Heat Cool Heat Cool and Program mode In off mode the thermostat will not turn on heating or cooling devices The manual fan can be turned on in all operating modes using the fan button In heat mode the thermostat controls the heating system In the cool mode the thermostat ...

Page 19: ...nge from OFF HEAT COOL and AUTO changeover modes FAN right Used to turn on and off the indoor fan PROG SYS and FAN Used to change from program operation to manual operation UP and PROG Held in simultaneously for 10 seconds to lock and unlock the thermostat DOWN and SYS Pressed simultaneously to display outdoor temperature if outdoor remote sensor is connected SYStem left FAN right Down button Up b...

Page 20: ...ng or cooling devices Note The indoor fan can be turned on manually in every operating mode by pressing the FAN right button The word FAN shows on the display and the fan icon appears when the fan operates OFF Heat Mode In this mode the thermostat controls the heating system When the heat outputs the flame icon apprears on the display Note For heat pumps there is a four minute delay for your compr...

Page 21: ...delay go to OFF mode for 5 seconds Cool and Heat Mode Auto Changeover In this mode the thermostat controls the cooling and heating systems automatically changing over from one to the other as needed The timing display alternates with the set temperature every 10 seconds in the cool and heat mode Emergency Heat Mode Heat pump systems only In emergency heat mode the heat pump system will be disabled...

Page 22: ...led by the set program schedule Program mode can function with heat mode cool mode or heat cool mode The program schedule can be overridden by changing the set temperature up or down button After 2 hours the program schedule will automatically be resumed To manually return to the program schedule press the PROG button twice PROG ...

Page 23: ...ur system Note For heat pumps there is a four minute delay to protect your compressor after it turns off To bypass the compressor time delay go to OFF mode for 5 seconds PM Cool Test 1 Press SYS left button until cool mode is displayed 2 Adjust set temperature so it is 5 degrees below room temperature 3 A C should come on within a few seconds Green LED may turn ON 4 Adjust the set temperature 2 de...

Page 24: ...nds to lock values into memory and return to the OFF mode or press the FAN right button once to enter programming 4 Press the FAN right button once to select minutes minutes flashing Press the up or down button to adjust the minutes 3 Time displays hour flashing Press the up or down button to adjust the hour 2 Press and hold the PROG button SYS left and FAN right buttons pressed simultaneously in ...

Page 25: ...options Note The days of the week shown on the display will be programmed simultaneously The screens are listed below Screen 1 SUN MON TUE WED THU FRI SAT Screen 2 MON TUE WED THU FRI Screen 3 MON Screen 4 TUE Screen 5 WED Screen 6 THU Screen 7 FRI Screen 8 SUN SAT Screen 9 SAT Screen 10 SUN Program Overview The SC5811 programmable thermostat has four periods MORN DAY EVE NITE that are customizabl...

Page 26: ... different minutes Press FAN right button to advance to the next screen Heat set temperature displays Use the up or down button to adjust the heat set temperature Press FAN right button to advance to the next screen Cool set temperature displays Use the up or down button to adjust the cool set temperature Press FAN right button to advance to the next screen Programmable fan screen displays Use the...

Page 27: ...ment is limited Select the appropriate lockout from Configuration Mode Settings Step 8 Page 13 of this guide To activate the LOCK feature 1 Simultaneously press the SYS FAN and UP buttons for 10 seconds 2 will display and the lockout function will be enabled To deactivate the LOCK feature repeat steps 1 and 2 above ...

Page 28: ...AT 70 F HEAT 62 F HEAT 70 F HEAT 62 F COOL 78 F COOL 85 F COOL 78 F COOL 82 F FAN Off FAN Off FAN Off FAN Off MONDAY thru SUNDAY Personal Program Schedule MORN DAY EVE NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL FAN FAN FAN FAN MONDAY 1 TUESDAY 2 MORN DAY EVE NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL FAN FAN FAN FAN WEDNESDAY 3 MORN DAY EVE NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL FAN FAN ...

Page 29: ...Y EVE NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL FAN FAN FAN FAN MORN DAY EVE NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL FAN FAN FAN FAN MORN DAY EVE NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL FAN FAN FAN FAN MORN DAY EVE NITE HEAT HEAT HEAT HEAT COOL COOL COOL COOL FAN FAN FAN FAN ...

Page 30: ...Press the up and down buttons and CONFIG switch simultaneously for 5 seconds to exit from data transfer mode and to return the master to the OFF mode 7 Turn off power to the master and remove it from the wall 8 Connect the master to the target using the 3 wire connector Attach one end to the Master s FP pins and the other end to the Target s FP pins Note Target thermostat must be powered with 24 V...

Page 31: ...erride Fan runs continuously Press FAN right button to turn fan off Fan turns on occasionally Program Mode Check programmable fan setting in program schedule see Page 24 Status indicator light not on during call Turn status indicator function on see Configuration Mode Setting 15 Page 15 Room temperature is not correct Calibrate thermostat see Configuration Mode Setting 11 Page 14 If remote sensor ...

Page 32: ...anty the Buyer shall 1 Notify the Seller promptly of any claim submitting date code information or any other pertinent data as requested by the Seller 2 Permit the Seller to inspect and test the product claimed to be defective Items claimed to be defective and are determined by Seller to be non defective are subject to a 30 00 per hour inspection fee This warranty constitutes the Seller s sole lia...

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