Safety 19Permanent magnet synchronous motor drivesThese are additional warnings concerning permanent magnet synchronous motordrives. Ignoring the instructions can cause physical injury or death, or damage to theequipment.WARNING! Do not work on the drive when the permanent magnetsynchronous motor is rotating. Also, when the supply power is switched off andthe inverter is stopped, a rotating permanent magnet synchronous motor feeds powerto the intermediate circuit of the drive and the supply connections become live.Before installation and maintenance work on the drive:• Stop the motor.• Ensure that there is no voltage on the drive power terminals according to step 1 or2, or if possible, according to the both steps.1. Disconnect the motor from the drive with a safety switch or by other means.Measure that there is no voltage present on the drive input or output terminals(U1, V1, W1, U2, V2, W2, BRK+, BRK-).2. Ensure that the motor cannot rotate during work. Make sure that no othersystem, like hydraulic crawling drives, is able to rotate the motor directly orthrough any mechanical connection like felt, nip, rope, etc. Measure that thereis no voltage present on the drive input or output terminals (U1, V1, W1, U2,V2, W2, BRK+, BRK-). Ground the drive output terminals temporarily byconnecting them together as well as to the PE. General safetyWARNING! Ignoring the following instructions can cause physical injury ordeath, or damage to the equipment.• The drive is not field repairable. Never attempt to repair a malfunctioning drive;contact your local ABB representative or Authorized Service Center forreplacement.• Make sure that dust from drilling does not enter the drive during the installation.Electrically conductive dust inside the drive may cause damage or lead tomalfunction.• Ensure sufficient cooling.