Danfoss VLT FCD 303 Operating Instructions Manual

Also see for VLT FCD 303: Design guide

Contents

Danfoss VLT FCD 303 Operating Instructions Manual Manual pdf 4 page image

VLT ® FCD Series■ High voltage warningThe voltage of the frequency converteris dangerous whenever the converteris connected to mains. Incorrect fittingof the motor or frequency converter may causedamage to the equipment, serious injury or death.Consequently, it is essential to comply with theinstructions in this manual as well as local andnational rules and safety regulations.■ These rules concern your safety1. The frequency converter must be disconnected fromthe mains if repair work is to be carried out. Checkthat the mains supply has been disconnectedand that the prescribed time has passed beforeremoving the inverter part from the installation.2. The [STOP/RESET] key on the optional controlpanel does not disconnect the equipment frommains and is thus not to be used as a safety switch.3. The unit must be properly connected to theearth, the user must be protected against thesupply voltage and the motor must be protectedagainst overloading pursuant to prevailingnational and local regulations.4. The earth leakage currents are higher than 3.5 mA.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. Forthe North American market: The ETR functionsprovide overload protection of the motor, class20, in accordance with NEC.■ Warning against unintended start1. The motor can be brought to a stop bymeans of digital commands, bus commands,references or a local stop, while the frequencyconverter is connected to mains. If personalsafety considerations make it necessary toensure that no unintended start occurs, thesestop functions are not sufficient.2. While parameters are being changed, themotor may start. Consequently, the stopkey [STOP/RESET] on the optional controlpanel must always be activated, followingwhich data can be modified.3. A motor that has been stopped may start if faultsoccur in the electronics of the frequency converter,or if a temporary overload or a fault in the supplymains 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.B7.02 - VLT is a registered Danfoss trademark4