LENNOX CORE Service App
Lennox CORE Service App Before You Call
Applies to Lennox Model L and Enlight Rooftop Units 3-25 tons
Helpful Resources
- Installation and service literature on LennoxCommercial.com or LennoxPros.com.
- CORE Service App Reference Guide.
- CORE Service Curriculum on LennoxPros.com.
- Lennox Model L and CORE Control System videos.
Requirements
- iOS or Android device – phone or tablet with Android 6.0 (Marshmallow) or iOS version 11 minimum. Android hardware requires 2GB RAM and a 2GHz Core processor.
- CORE Service App found at the appropriate App Store or at the following QR:
| Step | Action | Check |
| 1 | Ensure you have the latest version of the CORE Service app installed on your device. Scan the QR code above or visit the app store to download the latest version. | |
| 2 | Power to the unit must be ON for at least 2 minutes before attempting to connect your device to the unit. | |
| 3 | Ensure the black plastic cover is seated properly to the W4 board. | |
| 4 | Open the CORE Service app on your device. Press and hold the Pair button on the CORE controller for 5 seconds. The pair light will flash blue (the pair light must be flashing blue in order to connect your device). | |
| 5 | Using the CORE app, verify you have selected the correct unit to pair to. Refer to the 4 digit code on the CORE controller and select the correct unit on the app. | |
| 6 | Inspect the connections on the CORE board and verify all plugs are properly fastened. | |
| 7 | Check for proper incoming power. + or -10% of the nominal voltage indicated on the unit’s name plate. Check for proper 24VAC control voltage. The control voltage should be 18-30 VAC at P395, between terminals 1,2 and 3,4 ( 1=24 VAC input , 2=COM, 3=24VAC input, 4=COM). | |
| 8 | Ensure the unit’s control mode is set properly. You can verify this by entering the network integration menu path. Then verify the unit is receiving a controls signal to operate. | |
| 9 | Refer to the CORE service App for alarm code explanation and causes | |
| 10 | Avoid the wait time and refer to the Installation Manual provided in the unit or visit Lennoxcommercial.com for additional technical information. |
Customer Support
Self-Service Technical Support with No Wait Times
Click on the black logos below to download these apps
 |  |  | |
 | | ||
 | |  | |
| |
Download all Training Toolbox Tips
Register for Technical Training Webinars
Documents / Resources
 | LENNOX CORE Service App [pdf] Instructions Model L, Enlight Rooftop Units 3-25 tons, CORE Service App, CORE App, Service App |
 | LENNOX CORE Service App [pdf] User Guide CORE Service App, CORE Service, App |
 | LENNOX CORE Service App [pdf] Instructions Model L, Enlight Rooftop Units 3-25 tons, CORE Service App, CORE App, Service App, App |
