Siemens SINAMICS S120 Equipment Manual page 250

Maintenance and servicing
9.4 Replacing components
Preparatory steps
• Disconnect the drive line-up from the power supply.
• Allow unimpeded access.
• Remove the front cover.
Removal steps
The steps for the removal procedure are numbered in accordance with Fig. 9-26.
4. Disconnect the plugs for the signal cables (2 plugs).
5. Remove the DRIVE-CLiQ cable and connection on –X41 / –X42 (2 plugs).
6. Remove the retaining screws for the slide-in electronics unit (2 screws). The bottom
screw also secures the front electronics fan.
When removing the slide-in electronics unit, you have to disconnect 2 further plugs one
after the other (1 at the top, 1 below) and the PE connection (below).
Caution
When removing the fan, ensure that you do not damage any signal cables.
The Power Supply Board can then be removed from the slide-in electronics unit.
Installation
To re-install the fan, carry out the above steps in reverse order.
Caution
The tightening torques specified in Table 9-1 must be observed.
Carefully re-establish the plug connections and ensure that they are secure.
The screwed connections for the protective covers must only be tightened by hand.
9-56
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
Chassis Power Units Liquid Cooled