ABB ACS580 VFD
ABB ACS580 VFD code D503: VSD controlled PFC motor interlocked
The motor connected to the drive is interlocked and unavailable, preventing it from running.
- Code
- D503
- Name
- VSD controlled PFC motor interlocked
- Controller
- ABB ACS580 VFD
- Type
- Safety interlock
- What it does
- Warning: the equipment keeps running and flags a problem
- Risk
- GREEN In your wheelhouse
- Reset
- Clears on its own when the condition goes away
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated November 4, 2026
How to fix it
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- 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
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Questions about this code
What does ABB ACS580 VFD code D503 mean?
The motor connected to the drive is interlocked and unavailable, preventing it from running.
Is ABB ACS580 VFD code D503 dangerous?
It is graded green: in a working tech's wheelhouse with standard tools and low risk.
How do I fix ABB ACS580 VFD code D503?
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.