Danfoss VLT HVAC Basic Drive FC 101 Programming Manual page 42

Parameters
2-17 Over-voltage Control
Option:
3 3
[0] Disabled
[1] Enabled (not
at stop)
[2] Enabled
*
40
®
VLT
Function:
Select whether to enable OVC during ramp
down, which reduces the risk of frequency
converter trip due to overvoltage on the DC
link caused by generative power from load.
No OVC required.
Activates OVC when the frequency converter
is not in the stop state.
Activates OVC.
NOTICE
The ramp time is automatically
adjusted to avoid tripping of the
frequency converter.
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HVAC Basic Drive FC 101
MG18B502