What It Means
- HIGH PRESSURE STRIKE 3 - COMPRESSOR 2
Lennox Unit controller
Lennox Unit controller Error Code 15
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 15
• Compressor lockout. Check charge, fans and coil. Use service menu to clear lockouts. • User will be able to clear high pressure switch compressor lockout and alarm via user interface. High pressure switch compressor lockout and alarm will be cleared after the CORE Unit Controller reset. • High pressure switch compressor lockout and alarm will be cleared on removal of cooling demand. • Default is 3 occurrences and can be set between 1 and 7 occurrences.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
HIGH PRESSURE STRIKE 3 - COMPRESSOR 2
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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