Danfoss VLT HVAC Drive FC 102
Danfoss VLT HVAC Drive FC 102 code 46: Power card supply
The drive will not operate because the electrical supply on the power card is out of the acceptable range.
- Code
- 46
- Name
- Power card supply
- 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 46 mean?
The drive will not operate because the electrical supply on the power card is out of the acceptable range.
Is Danfoss VLT HVAC Drive FC 102 code 46 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 46?
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
40 · Overload of digital output terminal 2741 · Overload of digital output terminal 2942 · Overload of digital output on X30/6 or o45 · Ground fault 247 · 24 V supply low48 · 1.8 V supply low49 · Speed limit50 · AMA calibration failed51 · AMA check Unom and Inom52 · AMA low Inom
All 73 Danfoss VLT HVAC Drive FC 102 codes · Every fault code