22-20 Low Power Auto Set-up
Option:
Function:
When set for
Enabled
, an auto set up sequence is activated, automatically setting speed to approx.
50 and 85% of rated motor speed (par. 4-13
, par. 4-14 Motor
Speed
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
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
or par. 4-14 Motor
Speed High Limit [Hz]
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
NB!
Carry out the tuning with the same settings in par. 1-03 Torque
Characteristics
, as for operation after the tuning.
22-21 Low Power Detection
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
Speed Low Limit [Hz]
.
22-23 No-Flow Function
Option:
Function:
Common actions for Low Power Detection and Low Speed Detection (Individual selections not pos-
sible).
[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.
VLT
®
AQUA Drive
Operating Instructions
8. How to programme the frequency converter
MG.20.M5.02 - VLT
®
is a registered Danfoss trademark
97
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