Danfoss VLT AQUA Drive FC 200 Instruction Manual page 129

6 How to Program the Low Harmonic Drive
22-24 No-Flow Delay
Range:
10 s* [1 - 600 s]
22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
[0] * OFF
[1] Warning
[2] Alarm
[3] Man. Reset Alarm
6
NOTE!
Low Power Detection
Flow Power Tuning
NOTE!
Do not set par. 14-20
cause the drive to continuously cycle between running and stopping when a dry pump condition is detected.
NOTE!
If the drive is equipped with a constant speed bypass with an automatic bypass function that starts the bypass if the drive experiences
a persistent alarm condition, be sure to disable the bypass' automatic bypass function, if [2] Alarm or [3] Man. Reset Alarm is selected
as the dry pump function.
22-27 Dry Pump Delay
Range:
10 s* [0 - 600 s]
22-30 No-Flow Power
Range:
0.00 kW* [0.00 - 0.00 kW]
22-31 Power Correction Factor
Range:
100 %* [1 - 400 %]
6-36
Function:
Set the time. Low Power/Low Speed must remain detected to activate signal for actions. If detection
disappears before the timer runs out, the timer will be reset.
Function:
The drive will continue to run, but activate a dry pump warning [W93]. A drive digital output or a
serial communication bus can communicate a warning to other equipment.
The drive will stop running and activate a dry pump alarm [A93]. A drive digital output or a serial
communication bus can communicate an alarm to other equipment.
The drive will stop running and activate a dry pump alarm [A93]. A drive digital output or a serial
communication bus can communicate an alarm to other equipment.
Low Power Detection
must be Enabled (par. 22-21
Low Power Auto Set-up
, or par. 22-20
Reset Mode , to [13] Infinite auto reset, when par. 22-26
Function:
Defines for how long the Dry Pump condition must be active before activating Warning or Alarm
Function:
Readout of calculated no-flow power at actual speed. If power drops to the display value, the ad-
justable frequency drive will consider the condition as a no-flow situation.
Function:
Make corrections to the calculated power at par. 22-30
If No Flow is detected when it should not be detected, the setting should be decreased. However,
if No Flow is not detected when it should be detected, the setting should be increased to above
100%.
MG.20.T1.22 - VLT
VLT AQUA Low Harmonic Drive Instruction
) and commissioned (using either parameter group 22-3*,
) in order to use Dry Pump Detection.
Dry Pump Function
No-Flow Power
®
is a registered Danfoss trademark
Manual
No
is set to [2] Alarm. Doing so will
.