Danfoss VLT HVAC Drive FC 102
Danfoss VLT HVAC Drive FC 102 code 60: External interlock
The drive trips and stops the motor because an external interlock signal indicates a fault condition outside the drive.
- Code
- 60
- Name
- External interlock
- Controller
- Danfoss VLT HVAC Drive FC 102
- Type
- Safety interlock
- What it does
- Warning: the equipment keeps running and flags a problem
- Risk
- GREEN In your wheelhouse
- 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
- 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 Danfoss VLT HVAC Drive FC 102 code 60 mean?
The drive trips and stops the motor because an external interlock signal indicates a fault condition outside the drive.
Is Danfoss VLT HVAC Drive FC 102 code 60 dangerous?
It is graded green: in a working tech's wheelhouse with standard tools and low risk.
How do I fix Danfoss VLT HVAC Drive FC 102 code 60?
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
56 · AMA interrupted by user57 · AMA internal fault58 · AMA Internal fault59 · Current limit62 · Output frequency at maximum limit65 · Control card overtemperature66 · Heatsink temperature low67 · Option module configuration has changed68 · Safe Stop activated69 · Power card temperature
All 73 Danfoss VLT HVAC Drive FC 102 codes · Every fault code