Danfoss VLT HVAC Drive FC 102
Danfoss VLT HVAC Drive FC 102 code 36: Mains failure
The drive issues an alarm and stops because the main supply voltage to the unit has been lost.
- Code
- 36
- Name
- Mains failure
- Controller
- Danfoss VLT HVAC Drive FC 102
- Type
- Power supply
- 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
- 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 36 mean?
The drive issues an alarm and stops because the main supply voltage to the unit has been lost.
Is Danfoss VLT HVAC Drive FC 102 code 36 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 36?
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
31 · Motor phase V missing32 · Motor phase W missing33 · Inrush fault34 · Fieldbus communication fault38 · Internal fault39 · Heatsink sensor40 · Overload of digital output terminal 2741 · Overload of digital output terminal 2942 · Overload of digital output on X30/6 or o45 · Ground fault 2
All 73 Danfoss VLT HVAC Drive FC 102 codes · Every fault code