Danfoss VLT HVAC Drive FC 102
Danfoss VLT HVAC Drive FC 102 code 58: AMA Internal fault
The automatic motor adaptation process has failed completely due to a severe internal drive fault.
- Code
- 58
- Name
- AMA Internal fault
- Controller
- Danfoss VLT HVAC Drive FC 102
- Type
- Internal fault
- What it does
- Fault: the equipment trips and stops
- Risk
- YELLOW Booth plays by its own rules
- 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
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does Danfoss VLT HVAC Drive FC 102 code 58 mean?
The automatic motor adaptation process has failed completely due to a severe internal drive fault.
Is Danfoss VLT HVAC Drive FC 102 code 58 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 Danfoss VLT HVAC Drive FC 102 code 58?
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.
Other Danfoss VLT HVAC Drive FC 102 codes
54 · AMA motor too small55 · AMA parameter out of range56 · AMA interrupted by user57 · AMA internal fault59 · Current limit60 · External interlock62 · Output frequency at maximum limit65 · Control card overtemperature66 · Heatsink temperature low67 · Option module configuration has changed
All 73 Danfoss VLT HVAC Drive FC 102 codes · Every fault code