Samsung AC026RN1DKG Service Manual page 53

Disassembly and Reassembly
No. Parts
2 Control Box
3-16
Procedure
3) Remove a screw which is fixed to the
Indoor Unit upper part.
(Use +Screw Driver)
4) Put finger in the "PULL" marked groove
and then pull up the Cover
5) Put finger in the "PULL" marked groove
and then avoids the hook and it opens
the Control Box Cover
Remark
Samsung Electronics