Siemens S7-400 Installation Manual page 185

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.
Base
4. Pull out the fan to be replaced.
5. Slide the new fan in until it engages.
6. Slide the base in again and press it up.
7. Use a screwdriver to make a quarter turn clockwise and close the two
quick-release locks.
8. Use a pointed object to press the RESET button. The fault LED will go off and
the fan will start running.
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Maintenance
Fan
Fan grip
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