Lennox 19V30 Installation And Setup Manual
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Lennox 19V30 Installation And Setup Manual

Ultra smart thermostat
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iComfort
S30
®
Ultra Smart Thermostat
507536-08 10/2021
Supersedes 8/2021
Installation and Setup Guide
Copyright 2021
Lennox Industries Inc.
©
Dallas, Texas, USA

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Summary of Contents for Lennox 19V30

  • Page 1 ® Ultra Smart Thermostat 507536-08 10/2021 Supersedes 8/2021 Installation and Setup Guide Copyright 2021 Lennox Industries Inc. © Dallas, Texas, USA...

  • Page 2: Table Of Contents

    Heat Recovery Ventilator (HRV) ......46 Installation .............15 Index ................103 Fresh Air Damper ..........46 Mounting Display to Subbase .......16 Zoning Application ..........46 Lennox Communicating Air Handler Electric Operation of Fresh Air Dampers with Heat Configuration ...........16 Environmental Overrides........46 Auto Detection............16 Wiring ..............46 Manual Configuration ..........16...

  • Page 3: Shipping And Packing List

    System Status LED User guide Warranty certificate System Commissioning NOTE: Due to Lennox’ ongoing commitment to quality, features and options Status LED are subject to change without notice and without incurring liability. Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury. Installation and service must be performed by a qualified installer and servicing agency.

  • Page 4: Push Button Functions

    Push Button Functions Table 3. Commissioning LED Indicators The smart hub push button switch has two primarily functions. Commissioning Status LED • Rebooting: Press and hold the button for five seconds to reboot the smart hub. LED Color Status Description •...

  • Page 5: Terminals And Wiring Recommendations

    Table 4. Communication Error Troubleshooting (HD Display to smart hub) Possible Connection Issues S30 smart hub - System Status LED One communication wire at the smart hub COMM BUS A or B terminals is disconnected. Flashing Magenta LED Both communication wires – at the smart hub COMM BUS A or B terminals are reversed. Flashing Magenta LED Power wires at smart hub 12VDC + and - terminals are disconnected.

  • Page 6: Sensor Wiring

    HD Display External Components Sensor Wiring The following diagrams in this section illustrates the basic Lennox control wiring for all compatible components. Discharge Air Temperature Sensor (DATS) Proximity and Ambient Light Sensors The optional discharge air temperature sensor (DATS) (88K38) wiring distance...

  • Page 7: Reducing Electrical Noise

    Single wire terminal “C”. to terminal “C”. Unused wires Unused wires Smart Hub Display Subbase Unused wires Figure 4. iComfort S30 with Lennox Communicating Indoor and Outdoor Units Figure 3. Wire Termination in Communicating Systems (Electrical Noise) - Typical...
  • Page 8 Y2 OUT DATS (Optional) Communicating Furnace Unit SPDT RELAY Smart Hub Display Subbase Figure 5. iComfort S30 with Lennox Communicating Furnace with 24VAC (1- or 2-Stage) Heat Pump Only DATS (Optional) Lennox Communicating OATS (Optional) Indoor Unit SETUP NOTES: Cut Y1-Y2 on-board link for 2-stage outdoor units...
  • Page 9 If unable to connect two wires See iHarmony Installation instruction for damper connection information. to indoor unit terminals then pigtail wiring as exampled here. Figure 8. iComfort S30, Lennox Communicating Indoor and Outdoor Units, iHarmony Zoning System (Damper Control Module) and Zone Sensors...
  • Page 10 24VAC UV Light Applications: In any Lennox communicating system, the indoor unit will FURNACE (IFC) OR AIR HANDLER (AHC) NOT have adequate power to to run the 24VAC UV light application. An additional transformer will be required. UV light wiring connections are independent of the HVAC system operation CHARGE AIR SENSOR (refer to UV light installation instruction.
  • Page 11 NOTE: Set the communicating thermostat fan mode operation to Circulate and adjust duration to match control ventilation time duration. Figure 10. iComfort S30, Lennox Ventilation Control System (LVCS), Current Sensing Relay, 120VAC Coil Relay, Damper Transformer, Ventilation Dampers and Communicating Indoor Unit (using Non-Communicating Terminals)
  • Page 12 LENNOX COMMUNICATING INDOOR UNIT LENNOX COMMUNICATING FURNACE UNIT (SLP99, EL296 and SL280) FOR FLOAT SWITCH OPERATION, CUT R-DS. R-DS LENNOX COMMUNICATING W914 THERMOSTAT OR DAMPER CONTROL MODULE CONVENTIONAL LENNOX COMMUNICATING OUTDOOR UNIT INDOOR UNIT (1 OR 2 STAGE) LENNOX COMMUNICATING...
  • Page 13 Indoor Unit Controller HRV/ERV PureAir S Terminal Block Single wire to terminal “C”. Unused wires MAG-MOUNT SMART HUB Figure 12. Communicating Indoor Unit and PureAir S Wire Jumper required between ON and RED terminals. ACC1 is always low-stage for single- and two-stage ventilators.

  • Page 14: Installation Recommendations

    • Smart hub antenna should be positioned such that it is roughly vertical, Installation Recommendations no matter the orientation of the smart hub, itself. • Do not install the smart hub on the indoor unit, duct work, or other WARNING equipment that could induce vibration in the smart hub •...

  • Page 15: Hd Display Installation

    3. For low voltage wiring connections use diagrams in section titled IMPORTANT “Application Wiring” on page 7. Seal wire hole in wall to prevent cold or hot air from affecting temperature HD Display Installation sensor in HD Display. Installation 6. Strip 1/4” (6 mm) insulation from end of each wire. Use the following procedure for installation of the subbase where existing thermostat wiring does not exist: 1.

  • Page 16: Mounting Display To Subbase

    System can be controlled from mobile devices or consumer/dealer web portals once registration has been completed. 5. Do not remove the label covering the HD Display screen until after power is applied to the system. Lennox Communicating Air Handler Electric Heat Configuration WARNING Auto Detection DO NOT over-tighten mounting screws.

  • Page 17: Commissioning And Service (Using The Mobile Setup Application)

    • Disconnect any communication wiring between the smart hub and indoor Mobile Device Operating System Requirements unit prior to electric heat discovery. • The air handler control must be in idle mode (decimal blinks at 1 Hertz—0.5 The iComfort Mobile Setup application is available for both IOS 6.0 and higher second ON, 0.5 second OFF to use the following procedure.

  • Page 18: Service

    10. You can use the information provided in “Commissioning (Using the HD 9. Touch the remote-in tab on the iComfort Mobile Setup application home Display)” on page 19 to complete the commissioning process using the screen. iComfort Mobile Setup application. 10.

  • Page 19: Commissioning (Using The Hd Display)

    IMPORTANT is connected to the Internet, the remaining information will be populated automatically by the Lennox server based on the dealer name or phone number entered. All information can be entered manually if desired however. Sometimes there is a communication delay between the HD Display and...

  • Page 20: Equipment Found Screen

    Ventilation maintenance and Ventilation filter. would appear as either EIM-Furnace or EIM-Air Handler. When using a EIM the outdoor unit may be either a Lennox communicating or any Once a reminder is set for a specific item, touch done to return to the previous standard 24VAC non-communicating unit.

  • Page 21: Commissioning Completion

    • Cooling Circulation Airflow (blue) which includes total, assigned, minimum and maximum airflow. verify airflow per zone blower circulation airflow heating airflow cooling airflow assigned airflow 1900 cfm maximum airflow 915 cfm assigned airflow 1900 cfm maximum airflow 800 cfm assigned airflow 1900 cfm maximum airflow 915 cfm Select the object for master bedroom.
  • Page 22 To navigate back to the dealer control center, < Use to run test on Use to run touch on the Dave Lennox icon when available system components diagnostics on on the top left-hand side of the screen. system components <...

  • Page 23: Equipment Parameters

    The following is a complete list of all possible parameters listed under System. Parameters actually available are dependent on the Lennox communicating equipment type detected and non-communicating equipment added.
  • Page 24 Default is 3.0. Range is 1.0 to 15.0 in increments of 0.5. Units) This parameter is only available when a Lennox variable capacity outdoor units is installed along with a discharge air temperature sensor (DATS) Installed is used. DAT Offset Default is 0.0°F (0.0°C).
  • Page 25 NOTE: Not selectable on Lennox variable capacity outdoor units. Electric heat elements will be staged on by the demand of the thermostat. Range is 85 to 130ºF (29.4 to 54.4ºC). Default is 85ºF (29.4ºC). Adjustments can be made in increments of 15ºF (8.4ºC) .
  • Page 26 Minimum Overcooling: Indoor temperature > (greater than) two degrees below cooling setpoint. NOTE: Lennox variable capacity outdoor units are not compatible with Humiditrol (EDA). If it is determine that the actual humidity percentage being detected at the thermostat is off based on independent readings using other humidity reading devices, the Humidity Reading display can be adjusted using this setting.
  • Page 27 Cooling Step Change PI Gain Step change gains deal with set point changes and affects how fast the system reaches the next set point. Options are less aggressive, standard and more aggressive. Default is standard. (Lennox Variable Capacity Outdoor Units) Modulating...
  • Page 28 Table 6. Smart Hub Parameters Parameter (In alphabetical Description order) Number of Gas Number of selectable stages when Gas Heat Control Mode is set in “Staged” mode. Heating Stages Options are 1 through 4. Default is 4. (SLP98V only) Outdoor This will allow for adjustment to the outdoor temperature display when the display temperature is off.
  • Page 29 Conservative - The system will wait longer to display any Smart Alert Enable alarms. This options allow for a minimum chance for false alarms being shown. • Medium (default) - Extensive testing by the Lennox development team to minimize the number of false alarms. •...
  • Page 30 Differentials NOTE: Lennox variable capacity systems will stage electric heat but not on differentials. It will use the thermostat PI logic to stage the electric heat. If the system has a (2 through 6) variable capacity furnace or zoning all stage differentials will be ignored.
  • Page 31 Table 6. Smart Hub Parameters Parameter (In alphabetical Description order) Parameter range is 60 to 115ºF. Default is 100ºF. Can be adjusted in increments of 5ºF. Ventilation While the outdoor temperature is equal to or higher than the setting for Ventilation High Outdoor Temperature Limit, ventilation does not run. When locked out due High Outdoor to high outdoor temperature, it will become unlocked when either the outdoor temperature is missing, or when the temperature reported is 1°F less than the Ventilation Temperature Limit...
  • Page 32 Differential NOTE: For Lennox variable capacity outdoor units the differentials are ignored. Minimum and maximum CFM will be dependent on system component configurations. These parameter values are automatically adjusted to the specific hardware configuration. See iHarmony zoning system installation instruction for minimum CFMs for specific indoor units.
  • Page 33 Table 6. Smart Hub Parameters Parameter (In alphabetical Description order) This parameter setting compensates for a rapid change of the discharge air temperature due to fast changing conditions. It examines the change in the discharge air Zoning Anticipated temperature for the previous two minutes and extrapolates or looks forward by the number of seconds set in the parameter and uses this as the DATS value for staging. Discharge Air This parameter setting helps prevent limit trip/frozen coil from occurring.
  • Page 34 Table 7. Smart hub Parameters - Heat Cool Stages Locked In Cooling (1- and 2-Stages) Heating - Non-Heat Pump or Heat Pump w/o backup heat - 1 or 2 stages 1st stage 1st stage 1st stage Stages Stages stage Stg1 Differential Stg1 Differential Locked = Locked =...
  • Page 35 35°F (1.6°C). (Single and Two-Stage When ambient sensor temperature is higher than 40°F (4.5°C) then defrost termination will be 90°F (32°C). Lennox Communicating This option has two settings, either ON or OFF. Default is OFF. Heat Pump Units) Single and Two-Stage Heat Pumps: This feature reduces sounds that occur while the unit is cycling in and out of the defrost mode.
  • Page 36 Temp etc.) (Single and Two-Stage Staged – Both Furnace and Heat Pump are Multi-Stage: Lennox Communicating When the thermostat receives information that the heat pump has entered defrost the thermostat performs the following : Heat Pump Units) • Sends a first stage heating demand to the furnace.
  • Page 37 Heating Airflow Thermostat values shown are defaults. This value can be adjusted up or down to meet each application requirements. (Lennox Variable The range is 450 - 2150 CFM. Default is dependent on unit capacity with incremental adjustment of 25 CFM.
  • Page 38 Table 10. Air Handler Parameters Parameter Description Provides information concerning unit code, language support, equipment type name, unit model number, unit serial number, unit nominal capacity, number of heating states, heating capacity by stage, indoor blower CFM range, control software revision, control model number, control serial number, control hardware revision, discharge About air temp sensor, outdoor air temp sensor, protocol revision number, device product level, factory installed transformer, 24VAC average power consumption, 24VAC peak power consumption, line voltage average power consumption, line voltage peak power consumption, compatible devices list, applicable code memory size, and micro-...
  • Page 39 Table 11. Furnace Parameters Parameter Description This screen provides information on unit code, language supported, equipment type name, unit model number, unit serial number, unit nominal capacity, number of heating stages, heating capacity by stage, indoor blower CFM range, control software revision, control model number, control serial number, control hardware revision, About discharge air temp sensor, outdoor air temp sensor, protocol revision number, device product level, factory installed transformer, 24VAC average power consumption, 24VAC peak power consumption, line voltage average power consumption, line voltage peak power consumption, compatible devices list, application code memory size...
  • Page 40 Table 11. Furnace Parameters Parameter Description High HP Airflow Range is 800.0 to 1100.0 CFM. Default is 967.0 CFM. HP Indoor Blower The range is 0.0 - 60.0 seconds with a default setting base on equipment type match-up. Adjustment are increments of 5 seconds. Default is 45.0 seconds. Off Delay HP Indoor Blower The range is 0.0 - 30.0 seconds with a default setting base on equipment type match-up.
  • Page 41 When the user performs a picture upload from the settings > display > screen saver page, then on this screen it will only indicate that logo was selected. If no picture has been uploaded, then the Lennox logo would be displayed.

  • Page 42: Tests

    A updated installation report is generated and available in heating and cooling circulation. Touch continue to proceed to the next screen. Lennox Pros under the Homeowners account. • Manual Test: Depending on hardware present, various tests are available.

  • Page 43: Information

    May cool your home below the set temperature. Adding dealer information will ensure the thermostat is associated with your LennoxPros account when connecting to the Lennox server. NOTE: Recommend use of DATS catalog number 88K38 when variable capacity outdoor units are used.

  • Page 44: Advanced Dehumidification Descriptions

    Advanced Dehumidification Descriptions Table 16. Dehumidification Control Modes of Operations Mode of Option Description See table 1 for detail information concerning system operations when using Operation Normal, Max or Climate IQ settings. Variable Capacity Outdoor Unit: If at the start or during a cooling call, the humidity level is Table 16.

  • Page 45: Displaying Outdoor Temperature (Sensor) And Indoor Humidity On The Home Screen

    40. can enable this feature under the dealer control center. Use the following • Wiring connections are listed in “Figure 8. iComfort S30, Lennox procedure to enable the outdoor temperature sensor display Communicating Indoor and Outdoor Units, iHarmony Zoning System 1.

  • Page 46: Energy Recovery Ventilator (Erv)

    • Operation is otherwise the same as the ASHRAE compliant method. Lennox models are all non-communicating equipment and can be added during the commissioning procedure (see “Commissioning (Using the HD Display)” Wiring on page 19).

  • Page 47: Communicating System Configurations

    1. Wiring — See “Application Wiring” on page 7 and “Application Wiring” Table 17. Ventilation Control Modes on page 7. Fresh Air 2. DO NOT cut any option links on furnace control. Ventilation Control Mode Speed Speed Speed Speed Damper 3.

  • Page 48: Air Handler And Air Conditioner

    12. Touch exit to return to the home screen. the electric heat has not been configured. Configure the electric heat as described “Lennox Communicating Air Handler Air Handler and Air Conditioner Electric Heat Configuration” on page 16, or for complete detail, see the air handler installation instruction.

  • Page 49: Hybrid System Configurations

    2. Cut option link 2-stage compr (Y1 to Y2, W915) on furnace control on two- the furnace control stage Lennox brand conventional air conditioner units only. Communicating Furnace and Conventional Heat Pump Unit (Dual 3. After the entire system is wired, power up the system; the thermostat will check the system for installed communication devices.

  • Page 50: Communicating Air Handler And Conventional Air Conditioner

    > re-configure system. and “Application Wiring” on page 7. Communicating Air Handler and Conventional Heat Pump Unit 3. On air handler control, when matched with conventional Lennox brand 2-stage air conditioner, cut the Y1-Y2 2-stage comp on-board clippable link.

  • Page 51: Equipment Interface Module

    • Cut on-board R-O clippable link. 5. From the add/remove equipment screen, touch either 1-Stage A/C unit or 2-Stage A/C unit. 4. After the entire system is wired, energized the system and the thermostat will check the system for installed communication devices. 6.
  • Page 52 the home where the thermostat is located. Home Wi-Fi Access Point is Visible 1. Go to menu > settings > wi-fi , 2. Slide the option to ON to enable Wi-Fi. HOME WI-FI INTERNET SERVER THERMOSTAT ACCESS ROUTER 3. Wi-Fi network will show not connected. Press on not connected to CONNECTION display a list of available access points.

  • Page 53: Performance Reports

    More information concerning Performance Reports is available in the user • Service Soon alerts are found only in under the installer alert button. guide. • Information Only-Dealer is information only and helps Lennox interpret test Mobile Applications results and understand complicated behaviors. Information Only are not reported to homeowner or dealer.

  • Page 54: Soft Disable

    Filter 1 Reconfiguring the system should resolve this issue. 3001 Filter 2 The Lennox communicating thermostat will not show a alert code for a soft 3002 Humidifier pad disabled control. When soft disabling occurs only the control that has been disabled will display the blinking LED status or seven-segment display indicator.

  • Page 55: Alert Codes

    This will allow the system to auto-detect any Lennox communicating components attached. Thermostat did not find an indoor unit. Make sure there is an Lennox communicating indoor unit on the system. • Check for voltage and missing component.
  • Page 56 • Go to menu > settings > advanced settings > view dealer control center > equipment and press reset all equipment. This will allow the system to auto-detect any Lennox communicating components attached. The thermostat found more than one thermostat, indoor or outdoor unit on the system.
  • Page 57 • Once configuration is complete then reconnect thermostat wires. • Go to menu > settings > advanced settings > view dealer control center > equipment and press reset HVAC equipment. This will allow the system to auto-detect any Lennox communicating components attached.
  • Page 58 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 59 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 60 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 61 Review both active and cleared alerts. • Wi-Fi – Press and hold the Lennox logo on the bottom right of stat for 5 seconds to access the dealer control center. Follow the prompts to access the dealer / installer screen and select the “Alerts”...
  • Page 62 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 63 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 64 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 65 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 66 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 67 Pressure Switch Troubleshooting” for additional information. GF Low Service Automatically clears after the issue is Pressure Switch Other possible issues that are specific to the older Lennox communicating thermostats are as Urgent corrected. Stuck Closed follows: It has been determined that this alert code is generated when a subsequent heating call occurs within 30 seconds of a prior call for heat ending.
  • Page 68 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 69 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 70 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 71 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 72 • Check for high duct static. There is a discharge air temperature sensor issue. • Confirm there is no short or open circuits in the Lennox communicating thermostat connections to any of the other components in the communication system. Discharge Air Automatically clears 30 seconds after •...
  • Page 73 This is only applicable when matching non-communicating heat pump with Lennox communicating indoor unit. • Lennox communicating thermostat sends a Y1 compressor demand to the indoor control requesting it to relay the demand to the outdoor unit. • The indoor unit communicating control will verify the presences of 24VAC between the Y1 and C on its terminals.
  • Page 74 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 75 • The system will not operate. • Dealer has cut the W914 jumper (Dehum, Harmony III) on the Lennox furnace control. • The thermostat monitors the DS terminal in the furnace for power and if the link has been cut then power will be lost to DS.
  • Page 76 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 77 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 78 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 79 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 80 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 81 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 82 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 83 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 84 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 85 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 86 11 minute delay during the heating mode after receiving an alert code 433, which typically occurs during start-up. > If the system is connected to the Internet, the Lennox outdoor control can be updated over the Internet. Make sure the software “auto update” is enabled. The software “auto update” can be toggled to prompt the Lennox server to update the thermostat which will update the Lennox outdoor control.
  • Page 87 • This alert code will occur if the outdoor unit power is turned off and the indoor unit power (24VAC to Lennox outdoor control) remains on, or if the indoor unit power is turned off (24VAC to Lennox outdoor control) and the outdoor unit power is on. This could occur while performing service or maintenance procedures on the indoor or outdoor unit.
  • Page 88 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 89 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 90 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 91 Strikes Lockout • Outdoor unit will stop. The Lennox variable capacity unitary control (outdoor control) has incorrect appliance unit size code selected. OD MUC Unit Automatically clears after the correct • Check for proper configuring under unit size code used for outdoor unit (see unit configuration...
  • Page 92 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 93 • If after 10 minutes the condition does not change, the applicable alert code (542, 543, 544 or 545) is escalate by the Lennox communicating thermostat to critical. System will continue to operate in central mode. ZS Zone 4 Temp •...
  • Page 94 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 95 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 96 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 97 Service Automatically clears once is detected 65539 Connection Or The Lennox communicating control with the soft disable state will indicate so as follows: Urgent for two seconds. Internal Fault • On air handler, furnace and outdoor controls, the state is displayed by double horizontal lines on seven-segment display.
  • Page 98 • Typically the thermostat will send a command to the unknown device and place it in a soft disable state. The Lennox communicating control with the soft disable state will indicate so as follows: • On air handler, furnace and outdoor controls, the state is displayed by double horizontal lines Information on seven-segment display.
  • Page 99 Table 19. Alert Codes and Troubleshooting GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat Actual Displayed Alert Text Inverter Alert Priority Under dealer Flash Component or System Operational State and Troubleshooting Tip How to clear alert code...
  • Page 100 Can the homeowner access the consumer portal (www.myicomfort.com) from either a PC or tablet? Has the homeowner downloaded the Lennox Thermostat application from either Google Play or IOS App Store to their mobile devices? Is the Lennox Dealer account number or your main shop phone number been added to the dealer information screen? If applicable, has the air handler’s electric heat strips been commissioned? If not, commissioning of heat strips must be performed.

  • Page 101: Technical Support And Mobile App For Installers/Technicians Only

    Lennox iComfort S30 system directly on their mobile device. • Email • Thermostat Type and Monitor Status Once installed, the dealer can pair their mobile device to the Lennox iComfort smart hub to easily make changes from anywhere in the home, saving them Map displays the following: the hassle of walking back and forth from the thermostat to the indoor and •...
  • Page 102 NOTE: Clicking on a card with an alert expands to display the Remote In control (if enabled by the homeowner) and Troubleshoot (access to the Lennox Troubleshooting Center which includes error code lookups and any available documentation). Equipment & Reports •...

  • Page 103: Index

    Index Cooling Prognostics 24 EvenHeat Discharge Temp 25 Indoor Blower On Delay 38 Humiditrol Comfort Adjust 26 Humidity Reading Calibration 26 Dealer Control Center 22 Factory Reset Advanced Dehumidification Smart Hub 42 Defrost Termination Temp 36 Descriptions 44 Thermostat 42 iHarmony Zoning 20, 45 Dehumidification Airflow Profile - Cooling 38, 39...
  • Page 104 Gas Heating Steady State PI Gain (SLP98V only) 27 Gas Heating Step Change PI Gain (SLP98V only) 27 Screen Locked 41 Wall Insulation 32 HP Heating Cycles Per Hour 27 Screen Saver 41 Wide Setpoint 41 HP Heating Steady State PI Gain 27 HP Heating Step Change PI Gain 27 Smart Alert Enable 29 Wi-Fi 51...

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Icomfort s30

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