Danfoss VLT FC 102 Programming Manual

Also see for VLT HVAC Drive FC 102: Operating instructions Service guide Programming guide Installation guide Installation guide

Contents

22-23 No-Flow FunctionCommon actions for low-power detection and low-speeddetection (individual selections not possible).Option: Function:[0] * Off NOTICEDo not setparameter 14-20 Reset Mode, to[13] Infinite auto reset, whenparameter 22-23 No-FlowFunction is set to [3] Alarm.Doing so causes the frequencyconverter to continuously cyclebetween running and stoppingwhen a no-flow condition isdetected.NOTICEDisable the automatic bypassfunction of the bypass if thefrequency converter isequipped with a constant-speed bypass with anautomatic bypass functionstarting the bypass if thefrequency converterexperiences a persistent alarmcondition, and [3] Alarm isselected as the no-flowfunction.[1] Sleep Mode The frequency converter enterssleep mode and stops when a no-flow condition is detected. Seeparameter group 22-4* Sleep Modefor programming options for sleepmode.[2] Warning The frequency converter continuesto run, but activates a no-flowwarning (warning 92, NoFlow). Adigital output or a serial communi-cation bus can communicate awarning to other equipment.[3] Alarm The frequency converter stopsrunning and activates a no-flowalarm (alarm 92, NoFlow). Afrequency converter digital outputor a serial communication bus cancommunicate an alarm to otherequipment.22-24 No-Flow DelayRange: Function:10 s* [1 - 600 s] Set the time that low power/lowspeed must stay detected to22-24 No-Flow DelayRange: Function:activate a signal for actions. Ifdetection disappears before thetimer runs out, the timer is reset.22-26 Dry Pump FunctionSelect the action for dry-pump operation.Option: Function:[0] * Off[1] Warning NOTICETo use dry-pump detection:1. Enable low-powerdetection inparameter 22-21 LowPower Detection.2. Commission low-power detectionusing eitherparameter group 22-3*No-flow Power TuningNo Flow Power Tuning,orparameter 22-20 LowPower Auto Set-up.NOTICEDo not setparameter 14-20 Reset Mode to[13] Infinite auto reset, whenparameter 22-26 Dry PumpFunction is set to [2] Alarm.Doing so causes the frequencyconverter to continuously cyclebetween running and stoppingwhen a dry-pump condition isdetected.NOTICEFor frequency converters withconstant-speed bypass.If an automatic bypassfunction starts the bypass atpersistent alarm conditions,disable the automatic bypassfunction, if [2] Alarm or [3]Man. Reset Alarm is selected asthe dry-pump function.The frequency converter continuesto run, but activates a dry-pumpwarning (warning 93, Dry pump). Afrequency converter digital outputParameter Descriptions Programming GuideM0010001 Danfoss A/S © 10/2019 All rights reserved. 2013 3