Danfoss VLT FC 103 Operating Instructions Manual

Also see for VLT FC 103: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

Danfoss VLT FC 103 Operating Instructions Manual Manual pdf 28 page image

3 Start Up and Functional Testing3.1 Pre-start3.1.1 Safety InspectionWWARNINGHIGH VOLTAGE!If input and output connections have been connectedimproperly, there is potential for high voltage on theseterminals. If power leads for multiple motors areimproperly run in same conduit, there is potential forleakage current to charge capacitors within the frequencyconverter, even when disconnected from mains input. Forinitial start up, make no assumptions about powercomponents. Follow pre-start procedures. Failure to followpre-start procedures could result in personal injury ordamage to equipment.1. Input power to the unit must be OFF and lockedout. Do not rely on the frequency converterdisconnect switches for input power isolation.2. Verify that there is no voltage on input terminalsL1 (91), L2 (92), and L3 (93), phase-to-phase andphase-to-ground,3. Verify that there is no voltage on outputterminals 96 (U), 97 (V), and 98 (W), phase-to-phase and phase-to-ground.4. Confirm continuity of the motor by measuringohm values on U-V (96-97), V-W (97-98), and W-U(98-96).5. Check for proper grounding of the frequencyconverter as well as the motor.6. Inspect the frequency converter for looseconnections on terminals.7. Record the following motor-nameplate data:power, voltage, frequency, full load current, andnominal speed. These values are needed toprogram motor nameplate data later.8. Confirm that the supply voltage matches voltageof frequency converter and motor.Start Up and Functional Tes... VLTp Refrigeration Drive Operating Instructions24 MG16J102 - VLTp is a registered Danfoss trademark33inverter.ru (812) 702-47-50