What It Means
- INVERTER FATAL
Lennox Unit controller
Lennox Error Code 189
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 189
• Alarming Value = Inverter error code • Possible alarming values for alarm 189 are 21, 22, 23, 26, 28, 29, 61, 62 and 75. • Alarm 189 will clear upon manual reset. • Refer to trouble shooting guide in service manual for more information.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
INVERTER FATAL
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.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
