Carrier · Residential HVAC Systems
This fault for 18VS,19VS/V-HP/AC units indicates an issue with the outdoor fan inverter. The inverter controls the speed and operation of the outdoor fan motor.
Click steps to track your progress.
Turn off the power to the outdoor unit at the circuit breaker for at least 30 seconds.
Ensure the outdoor fan blade is not obstructed and can spin freely.
Restore power and listen for the fan to attempt to start.
If the fan inverter fault persists, contact a qualified HVAC technician for diagnosis and repair.