Siemens S7-400 installation manual Replacing the Filter Frame

Maintenance

7.9Replacing the Filter Frame of the Fan Subassembly During Operation

Replacing the Filter Frame

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.

2.Grasp the base with both hands, press it down slightly, pull it first fully forward and then up at an angle out of the fan subassembly.

3.The filter frame is secured either in the bottom of the base or at its rear edge with snap hinges and snap catches. The individual filter mats are joined with the filter frame.

Remove the filter frame as follows:

--The filter frame is fitted in the bottom of the base:

Near the snap catches, press against the filter frame from below and remove the filter frame.

--The filter frame is secured at the rear edge of the base:

With the flat of your hand, press the filter frame away from the base of the fan subassembly. This will release the filter frame from the snap hinges.

Filter mat

Filter frame

Cover

Snap catches

Base with cover and filter frame (optionally fitted at bottom or rear)

Snap hinges Quick-release locks

7-16	Automation System S7-400	Hardware and Installation
		A5E00850741-01