3 flashes, 9 beeps - Communication Error Between PFC and INV PCBs

What does 39 mean?

This code indicates a loss of communication between the PFC (Power Factor Correction) board and the INV (Inverter) PCB. This prevents the different parts of the system from working together correctly.

• Communication Error Between PFC and INV PCBs

Click steps to track your progress.

1. 1

   Turn off the power to the unit.

2. 2

   Check that all internal ribbon cables and connectors between the PFC and INV boards are securely seated.

3. 3

   Reset the unit by unplugging it for 1 minute and plugging it back in.

4. 4

   If communication is still lost, one of the boards may be faulty and require replacement by a technician.