Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 97

®
VLT AQUA Drive
Operating Instructions
22-20 Low Power Auto Set-up
Option:
[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
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
NB!
Carry out the tuning with the same settings in par. 1-03 Torque
22-21 Low Power Detection
Option:
[0] * Disabled
[1] Enabled
22-22 Low Speed Detection
Option:
[0] * Disabled
[1] Enabled
22-23 No-Flow Function
Option:
[0] * Off
[1] Sleep Mode
[2] Warning
[3] Alarm
Function:
Enabled
When set for , an auto set up sequence is activated, automatically setting speed to approx.
50 and 85% of rated motor speed (par. 4-13
High Limit [Hz]
). At those two speeds, the power consumption is automatically measured and stored.
Before enabling Auto Set Up:
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
Note that it is important also to set par. 1-03 Torque
Motor Speed High Limit [RPM]
Configuration Mode
.
Function:
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!
Function:
Select Enabled for detecting when the motor operates with a speed as set in par. 4-11
Low Limit [RPM]
or par. 4-12 Motor
Function:
Common actions for Low Power Detection and Low Speed Detection (Individual selections not pos-
sible).
Messages in the Local Control Panel display (if mounted) and/or signal via a relay or a digital output.
The frequency converter trips and motor stays stopped until reset.
®
MG.20.M5.02 - VLT is a registered Danfoss trademark
8. How to programme the frequency converter
Motor Speed High Limit [RPM]
Characteristics
or par. 4-14 Motor Speed High Limit [Hz]
Characteristics , as for operation after the tuning.
Speed Low Limit [Hz]
.
Speed
, par. 4-14 Motor
Configuration Mode ).
.
is set to the max. operational
8
Motor Speed
97