Danfoss vlt aqua Operating Instructions

22-20 Low Power Auto Set-up
Start of auto set-up of power data for No-Flow Power tuning.
Option: Function:
[0] * Off
[1] Enabled 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 Motor Speed High Limit [RPM] , 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 Configuration Mode ).
Note that it is important also to set par. 1-03 Torque Characteristics .
NB!
Auto Set Up must be done when the system has reached normal operating temperature!
NB!
It is important that the par. 4-13 Motor Speed High Limit [RPM] 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 Configuration Mode .
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 Motor Speed
Low Limit [RPM] or par. 4-12 Motor Speed Low Limit [Hz] .
22-23 No-Flow Function
Common actions for Low Power Detection and Low Speed Detection (Individual selections not possible).
Option: Function:
[0] * Off
[1] Sleep Mode The drive will enter Sleep Mode and stop when a No Flow condition is detected. See parameter
group 22-4* for programming options for Sleep Mode.
[2] Warning The drive will continue to run, but activate a No-Flow Warning [W92]. A drive digital output or a
serial communication bus can communicate a warning to other equipment.
[3] Alarm The drive will stop running and activate a No-Flow Alarm [A 92]. A drive digital output or a serial
communication bus can communicate an alarm to other equipment.
6 How to Programme the Low Harmonic Drive
VLT AQUA Low Harmonic Drive Operating In-
structions
112 MG.20.T1.02 - VLT
®
is a registered Danfoss trademark
6

Danfoss vlt aqua Specifications

General

Supply Voltage	200-240V, 380-500V, 525-600V
Enclosure	IP20
Features	Energy optimization
Approvals	CE, UL, cUL
Input Voltage Range	200-240V, 380-500V, 525-600V
Output Voltage Range	0 to supply voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Ground fault
Communication Interfaces	PROFIBUS
Cooling Method	Air-cooled