Danfoss VLT HVAC Drive FC 102
Danfoss VLT HVAC Drive FC 102 code 55: AMA parameter out of range
The automatic motor adaptation cannot run because the programmed motor parameter values are outside the acceptable range.
- Code
- 55
- Name
- AMA parameter out of range
- Controller
- Danfoss VLT HVAC Drive FC 102
- Type
- Setup or parameter 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
- Which manufacturer manual it comes from, linked
- The 1 common cause listed for this code
- 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 55 mean?
The automatic motor adaptation cannot run because the programmed motor parameter values are outside the acceptable range.
Is Danfoss VLT HVAC Drive FC 102 code 55 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 55?
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
51 · AMA check Unom and Inom52 · AMA low Inom53 · AMA motor too big54 · AMA motor too small56 · AMA interrupted by user57 · AMA internal fault58 · AMA Internal fault59 · Current limit60 · External interlock62 · Output frequency at maximum limit
All 73 Danfoss VLT HVAC Drive FC 102 codes · Every fault code