Danfoss VLT AQUA Programming Manual

Also see for vlt aqua: Instructions Design guide Instruction manual Operating instructions Design guide

Contents

- AlarmNo Flow Detection must be enabled (par. 22-23,No Flow Function) and commissioned (par. 22-3*,No Power Tuning).22-20 Low Power Auto Set-upOption: Function:[0] * Off[1] Enabled When set forEnabled, an auto set up sequence is activated,automatically setting speed to approx. 50 and 85% of ratedmotor speed (par. 4-13/14,Motor Speed High Limit). At thosetwo speeds, the power consumption is automatically measuredand stored.Before enabling Auto Set Up:1. Close valve(s) in order to create a no flow condition2. 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,TorqueCharacteristics.NB!Auto Set Up must be done when the system hasreached normal operating temperature!NB!It is important that the par. 4-13/14,Motor SpeedHigh Limit is set to the max. operational speed ofthe motor!It is important to do the Auto Set-up before con-figuring the integrated PI Contoller as settings willbe reset when changing from Closed to Open Loopin par. 1-00,Configuration Mode.NB!Carry out the tuning with the same settings inTorque Characteristics, par. 1-03, as for operationafter the tuning.22-21 Low PowerDetectionOption: Function:[0] * Disabled[1] Enabled If selecting Enabled, the Low Power Detection commissioningmust be carried out in order to set the parameters in group22-3* for proper operation!VLT ® AQUA Drive Programming Guide 2. Parameter DescriptionMG.20.O2.02 - VLT ® is a registered Danfoss trademark 1972