FUJITSU Siemens CELCIUS M/V/R - Manual (Page 40)

System upgrades
32 A26361-K990-Z120-1-7619, Edition 6
Opening the casing
► Switch the device off. The device must not be in the energy-saving mode!
!
Please take note of the safety information in the "Important notes" chapter.
Pull the power plug out of the mains outlet.
Only insert the power plug after you have closed the casing.
► Remove any connected cables in the unit that obstruct you.
► Place the device in a convenient working position.
Variant A (version with knurled screws)
1
1
► Unscrew the two knurled screws (1) on
the back of the casing.