Siemens Simatic S7-400

Maintenance
7-14
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
7.8 Replacing Fans in the Fan Subassembly During Operation
Removing the Fans
1. Use a screwdriver to make a quarter turn counter-clockwise and open the two
quick-release locks on the front of the fan subassembly.
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Fan 1 Fan 2 Fan 3
LEDs: F 1 = Fan 1
F 2 = Fan 2
F 3 = Fan 3
Quick-release locks
Reset button
Base
2. Grasp the base with both hands, press it down slightly and pull it fully out of the
fan subassembly.
3. Release the fan to be replaced by pressing the fan grip away from the housing
with your thumb.
Fan
Base
Fan grip
4. Pull out the fan to be replaced.
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