Short circuit
Danfoss · VLT HVAC Basic FC 101
What does 16 mean?
A direct short circuit condition has been detected either within the motor's windings or across its terminal connections. This is a highly critical fault that triggers a trip-lock, requiring a power cycle to reset after the cause is rectified. Operating with a short circuit can cause immediate and irreparable damage to the frequency converter's IGBTs or other power components.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Using a multimeter, measure the resistance between each motor phase (U-V, V-W, W-U) to check for very low or zero resistance, indicating a short. Also check resistance from each phase to the motor frame.
- 4
If the short is confirmed within the motor, it must be repaired or replaced before attempting to restart the drive.