Lennox · Communicating Systems
The inverter's power factor correction circuit is experiencing an over-current. This could be caused by high system pressures or a problem with the outdoor fan. The system will attempt to recover, but repeated errors will cause a lockout.
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Review thermostat and outdoor control for any related high-pressure alert codes.
Moderate errors will clear automatically. Critical errors will clear after the inverter is power cycled.
Verify that the outdoor unit fan is unobstructed and running properly.