Device maintenance and repair
7.3 Removing and installing hardware
138 Operating Instructions, 01/2021, A5E43920357-AA
Procedure
1. Use the status indicator ① to determine which module is defective, see "Status display of
redundant power supply (Page 33)".
2. Switch off the defective module using the on/off switch ②.
3. Disconnect the defective module from the line voltage.
To do so, unplug the power cord from the socket ③ of the defective module.
4. Remove the highlighted screw of the defective module ④.
5. Pull out the defective module at the handle.
6. Install the new module and fasten it with the previously loosened screw.
7. Plug the power cord into the socket of the newly inserted module ③.
8. Check the safe state of the device.
9. Switch the module on again using the on/off switch ② and make sure that the status display
is working correctly.
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