Operating instructions

Maintenance and servicing
11.4 Replacing components
Drive converter cabinet units
Operating Instructions, 10/2008, A5E00288214A
441
Preparatory steps
● Disconnect the cabinet unit from the power supply.
● Allow unimpeded access to the power block.
● Remove the protective cover.
Removal steps
The removal steps are numbered in accordance with the figure.
1. Unscrew the connection to the line or to the motor (3 screws).
2. Unscrew the connection to the DC link (4 screws).
3. Remove the retaining screws at the top (2 screws).
4. Remove the retaining screws at the bottom (2 screws).
5. Remove the CU320 mount (1 nut). If necessary, remove the PROFIBUS plug and
connection to the operator panel (-X140 on the CU320) and carefully remove the CU320.
6. Disconnect the connectors for the fiber-optic cables (5 plugs) and release the cable
connection for the signal cables (2 connectors).
7. Disconnect the plug for the thermocouple.
8. Unscrew the two retaining screws for the fan and attach the tool for de-installing the
power block at this position.
You can now remove the power block.
CAUTION
When removing the power block, ensure that you do not damage any signal cables.
Installation steps
For installation, carry out the above steps in reverse order.
CAUTION
The tightening torques specified in the table "Tightening torques for connecting current-
conducting parts" must be observed.
Carefully establish the plug-in connections and then ensure that they are secure.
The fiber-optic cable plugs must be remounted at their original slot. Fiber-optic cables and
sockets are accordingly labeled for correct assignment (U11, U21, U31).
The screwed connections for the protective covers must only be tightened by hand.