Danfoss VLT FCD 311 Design Manual

Also see for VLT FCD 303: Operating instructions

Contents

Danfoss VLT FCD 311 Design Manual Manual pdf 4 page image

VLT® FCD Series General warningThe voltage of the frequency converter isdangerous whenever the converter is con-nected to mains. Incorrect fitting of themotor or frequency converter may cause damage tothe equipment, serious injury or death. Conse-quently, it is essential to comply with the instructionsin this manual as well as local and national rules andsafety regulations These rules concern your safety1. The frequency converter must be disconnectedfrom the mains if repair work is to be carried out.Check that the mains supply has been discon-nected and that the prescribed time has passedbefore removing the inverter part from the instal-lation.2. The [STOP/RESET] key on the optional controlpanel does not disconnect the equipment frommains and is thus not to be used as a safetyswitch.3. The unit must be properly connected to the earth,the user must be protected against the supplyvoltage and the motor must be protected againstoverloading pursuant to prevailing national and lo-cal regulations.4. The earth leakage currents are higher than 3.5mA.5. Protection against motor overload is not includedin the factory setting. If this function is required,set parameter 128 Motor thermal protection todata value ETR trip or data value ETR warning.For the North American market: The ETR func-tions provide overload protection of the motor,class 20, in accordance with NEC. Warning against unintended start1. The motor can be brought to a stop by means ofdigital commands, bus commands, references ora local stop, while the frequency converter is con-nected to mains. If personal safety considerationsmake it necessary to ensure that no unintendedstart occurs, these stop functions are not suffi-cient.2. While parameters are being changed, the motormay start. Consequently, the stop key [STOP/RE-SET] on the optional control panel must always beactivated, following which data can be modified.3. A motor that has been stopped may start if faultsoccur in the electronics of the frequency con-verter, or if a temporary overload or a fault in thesupply mains or the motor connection ceases.195NA194.10Warning:It can be extremely dangerous to touch the electrical partseven when the AC line supply has been disconnected.For FCD 300: wait at least 4 minutes.MG.04.A1.02 - VLT is a registered Danfoss trade mark4