Siemens SENTRON 7KN POWERCENTER 3000 Manual page 117

Tools
Replacement of the batteries can be performed using the following tools:
• T20 screwdriver
• T8 screwdriver
• Wrench, width across flats 1.5 mm
Replacing the backup battery
NOTICE
Deletion of time setting
If the battery replacement takes longer than 30 s, the time setting is deleted. The device no
longer runs synchronously. Time-controlled programs are no longer running or are running
at the wrong time.
This can result in damage to the plant.
● Reset the time setting on the device or use time synchronization.
Proceed as follows to replace the backup battery:
1. Remove the ground connection.
2. Unscrew the screws on the two connection sides ③ and remove the covers.
3. Unscrew the threaded pins ① on the heat sink.
4. Unscrew the remaining screws ② on the heat sink.
5. Slide out the heat sink in the direction of the arrow and place the enclosure part on the
cooling fins.
7KN POWERCENTER 3000
Equipment Manual, 07/2020, L1V30579222003-03
Service and maintenance
7.4 Replacing the backup battery
115