ABB ACS850-04 series, Hardware Manual

Page: 122 / 164

Maintenance
122
Replacing the drive module
WARNING! Follow the safety instructions, page 14 . Ignoring the instructions can
cause physical injury or death, or damage to the equipment.
Handle the drive module carefully. Make sure that the module does not fall down
when moving it on the floor and during installation and maintenance work: Open the
support legs by pressing each leg a little down and turning it aside (1, 2). When ever
possible secure the module also with chains.
Do not tilt the drive module (A). It is heavy (over 160 kg [350 lb]) and its center of
gravity is high. The module will overturn from a sideways tilt of 5 degrees. Do not
leave the module unattended on a sloping floor.
1. Ensure that the drive is disconnected from the power line and all other
precautions described under Safety in installation and maintenance on page 14
have been taken into consideration.
2. Remove the left-hand side upper and lower front covers of the drive module by
undoing the fastening screws. M4×8 combi screws, 2 N·m.
3. Disconnect the drive module busbars from the input cabling panel. Combi screw
M12, 70 N·m (52 lbf·ft).
4. Disconnect the drive module busbars from the output cabling panel. Combi screw
M12, 70 N·m (52 lbf·ft).
5. Undo the screws that fasten the drive module to the cabinet at the top and behind
the front support legs.
6. Remove the front air baffle.
7. Fasten the extraction ramp to the cabinet base with two screws.
8. Disconnect the power supply cable and the fibre optic cables from the external
control unit and coil them on the top of the drive module. If you have an internal
control unit (+P905), detach the control unit from the drive module by undoing the
fastening screws below the optional modules and turn the control unit and the
cables aside. (Alternatively remove the clamp plate, and disconnect the cables
from the control unit.)
1
2
3
A