ABB ACS580 VFD
ABB ACS580 VFD code 5681: PU communication
Communication errors are detected between the control unit and power unit, stopping the drive.
- Code
- 5681
- Name
- PU communication
- Controller
- ABB ACS580 VFD
- Type
- Communication
- What it does
- Fault: the equipment trips and stops
- Risk
- YELLOW Booth plays by its own rules
- Reset
- Needs a manual reset
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated November 4, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- What the manual says to do, and the page it is on
- The step by step check for this problem, one check at a time
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does ABB ACS580 VFD code 5681 mean?
Communication errors are detected between the control unit and power unit, stopping the drive.
Is ABB ACS580 VFD code 5681 dangerous?
It is graded yellow: not hard, but a booth does it differently than the gear most techs know, so follow the checks in order.
How do I fix ABB ACS580 VFD code 5681?
The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.