ABB ACS580 VFD
ABB ACS580 VFD code FA81: Safe torque off 1
The first safe torque off circuit is broken and active, which forces the variable frequency drive to stop the motor.
Safety first. This code involves a gas, flame or electrical hazard. Do not keep resetting it. Leave burner, gas train and high voltage work to a qualified technician. WERCS answers 24/7 at (877) 489-3727.
- Code
- FA81
- Name
- Safe torque off 1
- Controller
- ABB ACS580 VFD
- Type
- Safety interlock
- What it does
- Fault: the equipment trips and stops
- Risk
- RED Specialist territory
- Reset
- Needs a manual reset
- 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 1 common cause listed for this code
- 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 FA81 mean?
The first safe torque off circuit is broken and active, which forces the variable frequency drive to stop the motor.
Is ABB ACS580 VFD code FA81 dangerous?
It is graded red, specialist territory: it involves a burner, gas, flame or safety lockout, so leave the repair to a qualified technician.
How do I fix ABB ACS580 VFD code FA81?
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.