Danfoss VLT FC 102 User Manual
Also see for VLT AQUA Drive FC 202: Service guideInstallation guideInstallation guideOperating guideInstallation guide
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Contents
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2 Safety2.1 Safety SymbolsThe following symbols are used in this manual:WARNINGIndicates a potentially hazardous situation that couldresult in death or serious injury.CAUTIONIndicates a potentially hazardous situation that couldresult in minor or moderate injury. It can also be used toalert against unsafe practices.NOTICEIndicates important information, including situations thatcan result in damage to equipment or property.2.2 Qualified PersonnelCorrect and reliable operation and maintenance arerequired for the trouble-free and safe operation of thedrive system. Only qualified personnel are allowed tooperate and maintain this equipment.Qualified personnel are defined as persons who are trainedand authorized to commission, operate, and maintainequipment, systems, and circuits in accordance withpertinent laws and regulations. Also, the personnel mustbe familiar with the instructions and safety measuresdescribed in this manual.2.3 Safety PrecautionsWARNINGHIGH VOLTAGEThe drive system contains high voltage when connectedto AC mains input. Failure to ensure that only qualifiedpersonnel are allowed to operate and maintain thesystem can result in death or serious injury.WARNINGUNINTENDED STARTWhen the drive system is connected to AC mains, themotor can start at any time. Unintended start duringprogramming, service, or repair work can result in death,serious injury, or property damage.The motor can start via any of the following:• An external switch.• A fieldbus command.• An input reference signal from the LCP.• A cleared fault condition.• Remote operation using MCT 10 software.To prevent unintended motor start:• Disconnect the drive system from AC mains.• Press [Off/Reset] on the LCP, beforeprogramming parameters.• The drive system, motor, and any drivenequipment must be fully wired and assembledwhen the drive is connected to AC mains.WARNINGDISCHARGE TIMEThe drive system contains DC-link capacitors. Once mainspower has been applied to the drive system, thesecapacitors can remain charged even after the power hasbeen removed. High voltage can be present even whenthe warning indicator lights are off. Failure to wait 20minutes after power has been removed beforeperforming service or repair work can result in death orserious injury.• Stop the motor.• Disconnect AC mains and remote DC-link powersupplies, including battery back-ups, UPS, andDC-link connections to other drives.• Disconnect or lock the PM motor.• Check the system for an installed externaldischarge resistor. If a discharge resistor isinstalled, activate its associated contactor.Before servicing the drive system, use amultimeter to verify that the DC voltage oneach drive module is fully discharged.• If an external discharge resistor is not installed,wait 20 minutes for the capacitors to dischargefully before performing any service or repairwork.Safety User GuideMG37L202 Danfoss A/S © 08/2017 All rights reserved. 52 2 |
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