Danfoss VLT AQUA Drive - Page 88

1. Close valve(s) in order to create a no flow condition
2. The frequency converter must be set for Open Loop (par. 1-00,
Configuration Mode ).
Note that it is important also to set par. 1-03,
Torque Characteristics .
[0]
*
Off
[1] Enabled
NB!
Auto Set Up must be done when the system has reached normal operating temperature!
NB!
It is important that the par. 4-13/14,
Motor Speed High Limit is set to the max. operational speed of the motor!
It is important to do the Auto Set-up before configuring the integrated PI Contoller as settings will be reset when changing from Closed
to Open Loop in par. 1-00,
Configuration Mode .
NB!
Carry out the tuning with the same settings in
Torque Characteristics , par. 1-03, as for operation after the tuning.
22-21 Low PowerDetection
Option: Function:
[0] *
Disabled
[1] Enabled If selecting Enabled, the Low Power Detection commissioning must be carried out in order to set the parameters
in group 22-3* for proper operation!
22-22 Low Speed Detection
Option: Function:
[0] *
Disabled
[1] Enabled Select Enabled for detecting when the motor operates with a speed as set in par. 4-11 or par. 4-12,
Motor Low
Limit
.
22-23 No-Flow Function
Option: Function:
Common actions for Low Power Detection and Low Speed Detection (Individual selections not possible).
[0]
*
Off
[1] Sleep Mode
[2] Warning Messages in the Local Control Panel display (if mounted) and/or signal via a relay or a digital output.
[3] Alarm The frequency converter trips and motor stays stopped until reset.
22-24 No-Flow Delay
Range: Function:
10 sec. * [0-600 sec.]
Set the time Low Power/Low Speed must stay detected to activate signal for actions. If detection disappears
before run out of the timer, the timer will be reset.
8. How to programme the frequency converter
VLT
®
AQUA Drive
Operating Instructions
88 MG.20.M4.02 - VLT
®
is a registered Danfoss trademark
8