Unknown power unit fault

What does 5698 mean?

An unidentified logical fault has occurred within the power unit. This suggests a deep internal problem with the power unit's control or processing, possibly due to corrupted firmware, a hardware malfunction, or an unexpected state. Unresolved, this prevents the drive from operating reliably and requires expert attention.

• Internal diagnostic hardware failure (e.g., ASIC, DSP) on the power board.
• Corrupted firmware in the power unit's dedicated control processor, leading to erratic operation.
• Intermittent internal communication fault between the power unit and the control unit.
• Power unit internal temperature exceeding design limits (e.g. >90°C) causing component instability.
• Undervoltage on internal power supply rails (e.g. 5VDC, 15VDC) within the power unit.

Click steps to track your progress.

1. 1

   Record all active fault codes and parameter settings (e.g., P0-01, P0-02) before proceeding.

2. 2

   Power cycle the drive by disconnecting main supply voltage for 60 seconds, then reapply.

3. 3

   Verify internal power supply voltages (e.g., 5VDC, 15VDC) on test points if available on the power unit, comparing against manufacturer specifications.

4. 4

   Check cooling fan operation and ensure heatsinks are clear of dust, verifying ambient temperature is within the drive's operating range (e.g. 0-40°C).

5. 5

   Attempt a firmware re-installation for the power unit, if supported by the drive's maintenance tools.

6. 6

   Isolate the power unit and perform internal component resistance checks (e.g., IGBTs, diodes) using a multimeter.