Maintenance
7-13
AutomationSystem S7-400 Hardwareand Installation
A5E00850741-01
7.7 Replacing the Fuse of the Fan Subassembly

Fuse Type

The fuse of the fan subassembly is a standard 5 x 20 mm cartridge fuse to DIN and
not a spare part.
Use the following fuse:
160 mA slow blow if the voltage selector switch is set to 230 V
250 mA slow blow if the voltage selector switch is set to 120 V

Replacing the Fuse

Toreplace the fuse of the module, follow the steps outlined below:
1. Disconnectthe power cable of the fan subassembly from the supply.
2. Usea screwdriver to unscrew the fuse cap.
Fuse cap
Voltageselector switch
3. Removethe blown fuse from the fuse cap.
4. Insertthe new fuse in the fuse cap and screw the cap into the fan subassembly.
5. Connectthe power cable of the fan subassembly to the supply.