ABB ACS355 VFD
ABB ACS355 VFD code 0028: 0028 SERIAL 1 ERR
The drive stopped because the fieldbus communication connection to the control system was broken.
- Code
- 0028
- Name
- 0028 SERIAL 1 ERR
- Controller
- ABB ACS355 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 July 22, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- Which manufacturer manual it comes from, linked
- The 4 common causes listed for this code
- 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 ACS355 VFD code 0028 mean?
The drive stopped because the fieldbus communication connection to the control system was broken.
Is ABB ACS355 VFD code 0028 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 ACS355 VFD code 0028?
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.