A921_O: PFC Temp Sensor Open
On the VSODC, this fault would be displayed on the seven-segment LED as a number 16. A 16 displayed is one of several inverter faults. You will need to validate this fault at the EcoNet Thermostat or by looking at the red or yellow flashing LED's in the upper right quadrant of the drive itself
The Drive LED's will be flashing the Red LED 1 time.
This is a fault internal to the drive itself. A sensor built into the drive is either seeing extremely low temperature through high resistance or is open. Perform a hard reset by powering down both the indoor unit and outdoor unit and reapplying power. If the fault persists, replace the drive.
