Danfoss VLT HVAC Drive FC 102
Danfoss VLT HVAC Drive FC 102 code 15: Hardware mismatch
A fitted option is incompatible with the current control board, preventing that specific option from operating.
- Code
- 15
- Name
- Hardware mismatch
- 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
- 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 15 mean?
A fitted option is incompatible with the current control board, preventing that specific option from operating.
Is Danfoss VLT HVAC Drive FC 102 code 15 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 15?
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
11 · Motor thermistor over-temp12 · Torque limit13 · Overcurrent14 · Ground fault16 · Short-circuit17 · Control word timeout18 · Start failed23 · Internal fan fault24 · External fan fault25 · Brake resistor short-circuit
All 73 Danfoss VLT HVAC Drive FC 102 codes · Every fault code