VLT ® 2900 Series High voltage warning 7. Note that the frequency converter has more voltage inputs than L1, L2 and L3 when the DC bus terminals are used. Check that all voltage inputs are disconnected and that the prescribed time has passed before repair work is commenced. The voltage of the frequency converter is dangerous whenever the converter is con- nected to mains. Incorrect fitting of the motor or frequency converter may cause damage to the equipment, serious injury or death. Consequently, it is essential to comply with the instructions in this manual as well as local and national rules and safety regulations. Warning against unintended start 1.
The motor can be brought to a stop by means of digital commands, bus commands, refer- ences or a local stop, while the frequency converter is connected to mains. If personal safety considerations make it necessary to ensure that no unintended start occurs, these stop functions are not sufficient. Installation in high altitudes: By altitudes above 2 km, please contact Danfoss Drives regarding PELV. Introduction to VLT 2900 2. While parameters are being changed, the motor may start. Consequently, the stop key [STOP/RESET] must always be activated, following which data can be modified. These rules concern your safety 1.
The frequency converter must be disconnec- ted from the mains if repair work is to be carried out. Check that the mains supply has been disconnected and that the prescribed time has passed before removing motor and mains plugs. 3. A motor that has been stopped may start if faults occur in the electronics of the frequen- cy converter, or if a temporary overload or a fault in the supply mains or the motor con- nection ceases. 2. The [STOP/RESET] key on the control panel of the frequency converter does not discon- nect the equipment from mains and is thus not to be used as a safety switch. 3.
The unit must be properly connected to the earth, the user must be protected against the supply voltage and the motor must be pro- tected against overloading pursuant to pre- vailing national and local regulations. 4. The earth leakage currents are higher than 3.5 mA. 5. Protection against motor overload is not in- cluded in the factory setting. If this function is required, set parameter 128 Motor thermal protection to data value ETR trip or data value ETR warning . For the North American market: The ETR functions provide overload protec- tion of the motor, class 20, in accordance with NEC. 6.
Do not remove the plugs for the motor - and mains supply while the frequency converter is connected to mains. Check that the mains supply has been disconnected and that the prescribed time has passed before removing motor and mains plugs. MG.29.A3.02 - VLT ® is a registered Danfoss trademark 7