POWER SUPPLY FAULT

What does 902 mean?

The Low Voltage Power Supply (A4) output has dropped below 60% of the rated voltage. This fault requires a CPU Reset and will shut down the drive.

• Loss of 115VAC power.
• Short circuits in +5V, +/-15V, or +24V circuits, possibly external to the drive.
• Failed Power Supply A4.
• Blown fuse internal to the power supply.

Click steps to track your progress.

1. 1

   Verify the 115VAC power supply.

2. 2

   Check +5V, +/-15V, or +24V circuits for short circuits, both internal and external to the drive.

3. 3

   Inspect the A4 Power Supply for failure.

4. 4

   Check for blown fuses internal to the power supply.