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. 4-13/14,
Motor Speed High Limit
). 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,
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.
VLT
®
HVAC Drive Programming Guide
3. Parameter Description
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
175
3