Danfoss VLT FC 100 Series Programming Manual page 175

®
VLT HVAC Drive Programming Guide
22-20 Low Power Auto Set-up
Option:
*
Off
[0]
[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,
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
22-21 Low PowerDetection
Option:
*
Disabled
[0]
[1] Enabled
22-22 Low Speed Detection
Option:
*
Disabled
[0]
[1] Enabled
22-23 No-Flow Function
Option:
* Off
[0]
[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. 4-13/14,
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,
Motor Speed High Limit
Configuration Mode .
Torque Characteristics
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 or par. 4-12,
Limit
.
Function:
Common actions for Low Power Detection and Low Speed Detection (Individual selections not possible).
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.11.C5.02 - VLT ® is a registered Danfoss trademark
Motor Speed High Limit
). At those two speeds, the power consumption is
Configuration Mode
Torque Characteristics
is set to the max. operational speed of the motor!
, par. 1-03, as for operation after the tuning.
3. Parameter Description
).
.
Motor Low
175
3