Siemens SIMATIC S7-400 Hardware And Installation Manual page 179

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, Installation Manual
C79000-G7076-C424-01
www.gkbpx.com
Maintenance
7-15