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The guide explains unit controller description, M4 unit controller layout and connections, communication interfaces (USB flash drive, S-BUS, MODBUS), local interface indicators, and LED status code interpretation. It also covers W4 communication module features, available accessories, firmware update preparation via USB, and CORE Service App unit operations such as pairing, alarms, data trending, reporting, and settings.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/lennox-core-control-system-unit-controller-application-guide-issue-485115-32024/608423/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/lennox-core-control-system-unit-controller-application-guide-issue-485115-32024/608423.png","ImageObject",300,407,{"name":92,"@type":93},"Dewi_Sukmawati","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-10-17",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What safety precautions does the guide require before servicing the unit controller?","Question",{"text":112,"@type":113},"The guide requires proper grounding, disconnecting remote power supplies before opening the access panel, and using lock-out/tag-out before maintenance. If system power is needed (e.g., smoke detector maintenance), it instructs disabling power to the blower and setting all controllers and thermostats to the “OFF” position before working.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which communication interfaces are described for the CORE unit controller?",{"text":117,"@type":113},"The guide covers USB flash drive interface usage, S-BUS (Smartwire™) (J304), and MODBUS connections. It also describes local interfaces such as push buttons and heart beat, plus LED indicators and seven-segment LED status codes.",{"name":119,"@type":110,"acceptedAnswer":120},"How does the document guide firmware updating for the M4 unit controller?",{"text":121,"@type":113},"It explains confirming the current M4 firmware version, preparing a USB flash drive, listing files needed for the update, creating the required folder, and then performing the firmware update.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},608423,1792514211,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},962094243415,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","LENNOX® CORE CONTROL SYSTEM (UNIT CONTROLLER) APPLICATION GUIDE  \n485115 3/2024 Supersedes 2/2024  \n|  WARNING |  |\n| --- | --- |\n| | Electric Shock Hazard. Can cause injury or death. Unit must be properly grounded in accordance with national and local codes.\u003Cbr>Line voltage is present at all components when unit is not in operation on units with single-pole contactors. Disconnect all remote electric power supplies before opening access panel. Unit may have multiple power supplies. |\n\n\n|  WARNING |\n| --- |\n| Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier. |\n\n\n|  WARNING |\n| --- |\n| To prevent serious injury or death:\u003Cbr>1. Lock-out/tag-out before performing maintenance.\u003Cbr>2. If system power is required (e.g. , smoke detector maintenance), disable power to blower, remove fan belt where applicable, and ensure all controllers and thermostats are set to the “OFF” position before performing maintenance.\u003Cbr>3. Always keep hands, hair, clothing, jewelry and tools away from moving parts. |\n\nTable of Contents  \n1. Abbreviations and Terms................................................ 5  \n2. Unit Controller Description............................................. 6  \n2.1. M4 Unit Controller Layout and Connections .........................6  \n2.1.1. CORE Unit Controller Overview ............................ 7  \n2.1.2. Lennox® CORE Service App ................................. 8  \n2.2. Lennox CORE Unit Controller-Connections, Inputs / Outputs, Jumpers, and LEDs Locations................................8  \n2.2.1. Thermostat Common Isolation-TSTAT_COM Jumper .................................................................. 8  \n2.2.2. Humidistat Common Isolation-HMD_COM Jumper .................................................................. 8  \n2.2.3. W4 Control-USB Flash Drive Interface Usage ... 8  \n2.2.4. S-BUS (Smartwire™) (J304) ................................. 8  \n2.2.5. MODBUS Connections ......................................... 8  \n2.2.6. CORE Unit Controller LED Indicators ................... 9  \n2.2.7. Local Interface-Push Buttons and Heart Beat..... 9  \n2.2.8. Local Interface-Four Character Seven-Segment LED-Status Codes .............................................. 9  \n3. W4 Communication Module-Connections, Buttons, and LEDs ........................................................................ 10  \n3.1. Buttons and LED Indicators................................................. 10  \n3.1.1. Pairing Button and LED ....................................... 10  \n3.1.2. Reset Button and Heart Beat LED ...................... 10  \n3.1.3. Cloud / IP Button and LED Indicators ................. 10  \n3.2. BLE Wireless Gateway ....................................................... 10  \n3.3. CORE Service App.............................................................. 10  \n3.4. Cloud Firmware Updates..................................................... 11  \n4. Available Accessories................................................... 11  \n4.1. LCS-5030 Wireless Sensor (21L07) ................................... 11  \n4.2. Wireless Repeater (21L09) ................................................ 11  \n4.3. Wireless Smart IAQ Sensor (25B37) ................................... 11  \n5. Updating M4 Firmware .................................................. 11  \n5.1. Confirming Current M4 Unit Controller Firmware Version... 11  \n5.2. Preparing USB Flash Drive ................................................. 11  \n5.3. Files Needed for Update ..................................................... 11  \n5.4. Creating Folder.................................................................... 11  \n5.5. Updating Firmware .............................................................. 12  \n6. CORE Service App-Unit Operations .......","cbCaiqTi1IxH8E9w","https://ap.wps.com/l/cbCaiqTi1IxH8E9w","pdf",7977146,145,"English","# Abbreviations and Terms\n# Unit Controller Description\n## M4 Unit Controller Layout and Connections\n## Lennox CORE Service App\n## CORE Unit Controller-Connections, Inputs / Outputs, Jumpers, and LEDs Locations\n## Thermostat Common Isolation-TSTAT_COM Jumper\n## Humidistat Common Isolation-HMD_COM Jumper\n## W4 Control-USB Flash Drive Interface Usage\n## S-BUS (Smartwire™) (J304)\n## MODBUS Connections\n## CORE Unit Controller LED Indicators\n## Local Interface-Push Buttons and Heart Beat\n## Local Interface-Four Character Seven-Segment LED-Status Codes\n# W4 Communication Module-Connections, Buttons, and LEDs\n## Buttons and LED Indicators\n## Pairing Button and LED\n## Reset Button and Heart Beat LED\n## Cloud / IP Button and LED Indicators\n## BLE Wireless Gateway\n## CORE Service App\n## Cloud Firmware Updates\n# Available Accessories\n## LCS-5030 Wireless Sensor (21L07)\n## Wireless Repeater (21L09)\n## Wireless Smart IAQ Sensor (25B37)\n# Updating M4 Firmware\n## Confirming Current M4 Unit Controller Firmware Version\n## Preparing USB Flash Drive\n## Files Needed for Update\n## Creating Folder\n## Updating Firmware\n# CORE Service App-Unit Operations\n## CORE Service App Menu Selection Overview\n## Pairing CORE Service App to CORE Unit Controller\n## System Overview-Room Sensor Mode\n## Active Alarms\n## CORE Service App General Menu + User Preference\n## CORE Service App RTU Menu\n## Setup\n## Install Menu Navigation\n## Network Integration\n## Test and Balance\n## Data\n## Alarm History\n## Data Trending\n## Factory\n## Runtimes\n## System Data / Sensor Data / Output\n## Service\n## Component Test\n## Report\n## Advanced Control\n## Settings\n## RTU Options\n## Install\n# Main Controller Operations","[{\"question\":\"What safety precautions does the guide require before servicing the unit controller?\",\"answer\":\"The guide requires proper grounding, disconnecting remote power supplies before opening the access panel, and using lock-out/tag-out before maintenance. If system power is needed (e.g., smoke detector maintenance), it instructs disabling power to the blower and setting all controllers and thermostats to the “OFF” position before working.\"},{\"question\":\"Which communication interfaces are described for the CORE unit controller?\",\"answer\":\"The guide covers USB flash drive interface usage, S-BUS (Smartwire™) (J304), and MODBUS connections. It also describes local interfaces such as push buttons and heart beat, plus LED indicators and seven-segment LED status codes.\"},{\"question\":\"How does the document guide firmware updating for the M4 unit controller?\",\"answer\":\"It explains confirming the current M4 firmware version, preparing a USB flash drive, listing files needed for the update, creating the required folder, and then performing the firmware update.\"}]","LENNOX CORE CONTROL SYSTEM (UNIT CONTROLLER) APPLICATION GUIDE - Issue 485115 3/2024 | PDF",1792253596,365]