No approx. 9-13 VDC between 12V and GND — Indoor electronic control P.C. board issue

What does Approx. 9 to 13 VDC not present between 12 V (+) and GND (-) mean?

The required 9 to 13 VDC power supply is not present between the 12V (+) and GND (-) terminals on the indoor electronic control P.C. board. This points to a power supply problem on the board.

• Faulty indoor electronic control P.C. board
• Power supply circuit malfunction on the board

Click steps to track your progress.

1. 1

   Turn off the power supply.

2. 2

   Check the connection CN10A on the indoor electronic control P.C. board and associated wires.

3. 3

   Replace the indoor electronic control P.C. board.

4. 4

   Confirm correct voltage output after replacement.