Siemens S7-400 - Replacing Fans in the Fan Subassembly During Operation

Maintenance
7-14
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
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