Danfoss FC322 Series Instruction Manual page 90

8 How to Programme the Frequency Converter
3-86 Check Valve Ramp End Speed [RPM]
Range:
0 [RPM]* [0 – Motor Speed Low Limit [RPM]] Set the speed in [RPM] below Motor Speed Low Limit where the Check Valve is expected to be closed
3-87 Check Valve Ramp End Speed [Hz]
Range:
0 [Hz]* [0 – Motor Speed Low Limit [Hz]]
8
3-88 Final Ramp Time
Range:
0 [s]* [0 – 60 [s]]
90
Function:
and the Check Valve no longer shall be active.
Function:
Set the speed in [Hz] below Motor Speed Low Limit where the Check Valve Ramp will no longer be
active.
Function:
Enter the Final Ramp Time to be used when ramping down from Motor Speed Low Limit, par. 4-11
or 4-12, to zero speed.
Submersible deep well pumps can be damaged by running below minimum speed. A fast ramp time
below minimum pump speed is recommended. This parameter may be applied as a fast ramp rate
from Motor Speed Low Limit to zero speed.
MG.20.U1.22
Automation VT Drive FC322
Instruction Manual