What It Means
- BYPASS DAMPER CONFIGURATION ERROR
Lennox Unit controller
Lennox Error Code 174
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 174
Room bypass damper operation should only be used if blower is configured for CAV operation.. Unit Controller will only allow zone bypass unit operation if configuration ID1 is set correctly. Alarm will automatically clear when configuration conflict is corrected.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
BYPASS DAMPER CONFIGURATION ERROR
MODEL L - M4 UNIT CONTROLLER, M4 Unit Controller
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
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