What It Means
- OD Inverter CT Circuit Fault
Lennox Equipment not specified
Lennox Error Code 423
Equipment not specified:
Causes & actions from Lennox
How it shows
- iComfort S30 alert: 423
- s30 inverter flash code: 40
Priority condition: Service Soon/Service Urgent The inverter has detected a circuit issue. • When this condition is detected the outdoor control will stop outdoor unit operations and start the anti-short cycle timer – moderate condition. • Outdoor control will lockout unit after 10 strikes within an hour – critical condition. • Inverter LEDs will flash code 40 • Refer to the unit service documentation for troubleshooting procedures. Priority condition: Service Soon/Service Urgent Inverter flash code 40: Priority condition: Service Soon/Service Urgent The sequence is: Red LED: Four Flashes Green LED: Off NOTE: Inverter normal operations with no error code present is as follows. Red LED is ON and Green LED is OFF.
Applicable models & manual sources
- iComfort S30
OD Inverter CT Circuit Fault
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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