ABB ACS550-01 User Manual page 6

6 ACS550-01/U1 User's Manual
WARNING! Disconnect the internal EMC filter when installing the drive on an IT
system (an ungrounded power system or a high-resistance-grounded [over 30 ohm]
power system), otherwise the system will be connected to ground potential through
the EMC filter capacitors. This may cause danger, or damage the drive.
Disconnect the internal EMC filter when installing the drive on a corner grounded TN
system, otherwise the drive will be damaged.
Note: When the internal EMC filter is disconnected, the drive is not EMC compatible.
See section Disconnecting the internal EMC filter on page 23. Also see sections IT
systems on page 280 and Corner grounded TN systems on page 279.
WARNING! Do not attempt to install or remove EM1, EM3, F1 or F2 screws while
power is applied to the drive's input terminals.
WARNING! Do not control the motor with the disconnecting device (disconnecting
means); instead, use the control panel start and stop keys and , or
commands via the I/O board of the drive. The maximum allowed number of charging
cycles of the DC capacitors (i.e. power-ups by applying power) is five in ten minutes.
WARNING! The ACS550-01/U1 is not field repairable. Never attempt to repair a
malfunctioning drive; contact the factory or your local Authorized Service Center for
replacement.
WARNING! The ACS550 will start up automatically after an input voltage interruption
if the external run command is on.
WARNING! The heat sink may reach a high temperature. See chapter Technical
data on page 271.
Note: For more technical information, contact the factory or your local ABB
representative.
Safety