ABB ACS550 User Manual page 6

6 ACS550 User's Manual
WARNING! If a drive whose internal EMC filter is not disconnected is installed on an
IT system [an ungrounded power system or a high resistance-grounded (over
30 ohm) power system], the system will be connected to earth potential through the
EMC filter capacitors of the drive. This may cause danger or damage the drive.
If a drive whose internal EMC filter is not disconnected is installed on a corner
grounded TN system, the drive will be damaged.
Disconnect the internal EMC filter by removing EM1 and EM3 screws (frame size
R1 R4, see the diagram in section Power connection diagrams on page 20) or F1
...
and F2 screws (frame size R5 or R6, see the diagram on page 21). Also see
sections IT systems on page 268 and Corner grounded TN systems on page 267.
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 six 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 259.
Note: For more technical information, contact the factory or your local ABB
representative.
Safety