ABB ACS880-07CLC

9. Pull the module carefully out onto a table or other platform. Keep the module secured
to a hoist or equivalent to prevent the module from falling.
Reinstalling the module
1. Push the module carefully into its bay.
2. Fasten the retaining screws at the top and the bottom of the module.
3. Reinstall the DC busbars at the top of the module.
4. Reconnect the coolant pipes to the module.
WARNING!
For a reliable connection, the end of the pipe entering the connector must be
completely intact for a length of at least 5 cm (2”). Make sure that the pipe is
perfectly round where it enters the connector, and not deformed eg. by any
bends nearby. The piping must not exert any tension or torque on the
connector.
5. Reconnect the control wiring to the module.
6.
Fill up the cooling system. For instructions, see section Filling up and bleeding the
internal cooling circuit (page 145).
7. Close the swing-out frame (if present). Reinstall all shrouds removed earlier.
8. If the Safe torque off function is in use, perform an acceptance test as described under
chapter Start-up including acceptance test.
￭ Activating the reduced run of the inverter unit
A “reduced run” function is available for inverter units consisting of parallel-connected inverter
modules. The function makes it possible to continue operation with limited current even if
one (or more) module is out of service, for example, because of maintenance work. In
principle, reduced run is possible with only one module, but the physical requirements of
operating the motor still apply; for example, the modules remaining in use must be able to
provide the motor with enough magnetizing current.
Note:
The wiring accessories and the air baffle needed during the procedure are included in the
delivery, and separately available from ABB.
WARNING!
Obey the instructions in chapter Safety instructions. If you ignore them,
injury or death, or damage to the equipment can occur.
1.
Stop the drive and do the steps in section Electrical safety precautions (page 16) before
you start the work.
2. Remove the shrouding above the module bay (in front of the DC fuses).
3. Remove the DC fuses and the busbar assembly connecting the fuses to the inverter
module. Store these parts – they are to be reinstalled only with the inverter module.
Make note of the order of washers.
4.
Remove the faulty module from its bay. See the Replacing an inverter module (page 134).
5. Plug the coolant pipes disconnected from the module using the plugs that are included
in the drive delivery.
136 Maintenance