Main Power Supply Unit 27V Not Present

What does 27V PS Off mean?

The '27 V Voltage, main power supply unit' Green LED is OFF, indicating that the main power supply unit is not providing its rated voltage. This means the overall system is not receiving the expected 27.1 V input power, which is critical for system operation.

1. 1

   Check the infeed at connector X1, verifying the presence and stability of the rated voltage of 27.1 V.