WARNINGDISCHARGE TIMEThe adjustable frequency drive contains DC linkcapacitors which can remain charged even when theadjustable frequency drive is not powered. Failure towait the specified time after power has been removedbefore performing service or repair work, could result indeath or serious injury.1. Stop motor.2. Disconnect AC line power, permanent magnettype motors, and remote DC link powersupplies, including battery backups, UPS, andDC link connections to other adjustablefrequency drives.3. Wait for the capacitors to discharge fully beforeperforming any service or repair work. Theduration of waiting time is specified inTable 2.1.Voltage [V] Minimum waiting time [minutes]4 7 15200–240 0.34–5 hp[0.25–3.7 kW]7.5–60 hp[5.5–45 kW]380–480 0.5–10 hp[0.37–7.5 kW]15–125 hp[11–90 kW]525–600 1–10 hp[0.75–7.5 kW]15–125 hp[11–90 kW]525–690 1.5–10 hp[1.1–7.5 kW]15–125 hp[11–90 kW]High voltage may be present even when the warning LEDindicator lights are off.Table 2.1 Discharge TimeWARNINGLEAKAGE CURRENT HAZARDLeakage currents exceed 3.5 mA. Failure to ground theadjustable frequency drive properly could result in deathor serious injury.• Ensure correct grounding of the equipment bya certified electrical installer.WARNINGEQUIPMENT HAZARDContact with rotating shafts and electrical equipmentcan result in death or serious injury.• Ensure only trained and qualified personnelperform installation, start-up, and maintenance.• Ensure that electrical work conforms to nationaland local electrical codes.• Follow the procedures in this manual.CAUTIONWINDMILLINGUnintended rotation of permanent magnet motorscauses risk of personal injury and equipment damage.• Ensure that permanent magnet motors areblocked to prevent unintended rotation.CAUTIONPOTENTIAL HAZARD IN THE EVENT OF INTERNALFAILURERisk of personal injury when the adjustable frequencydrive is not properly closed.• Before applying power, ensure all safety coversare in place and securely fastened.Safety VLT® AQUA Drive FC 20210 Danfoss A/S © 10/2014 All rights reserved. MG20MA2222