How can I reset CM - 530?

Start button flickers always RED.
After few seconds
an Alert sound comes out.
how can I reset CM-530 to factory

The CM-530’s firmware can only be recovered via ROBOTIS MANAGER V.1.
More info is at this link R+ Manager 1.0

There is a video link if you scroll down.

we have recovered CM-530s firmware via R+ Manager 1.0
thanks for contributing

how can we access / see assembly manual of STEM LEVEL 1-1 or 1-2
(for example bug fighter robot etc.
our own book is damaged)

Good question!
I have never seen any BIOLOID STEM (or other kits) Assembly Manuals on the web for sale or download. You may have to ask ROBOTIS folks directly or ask your local ROBOTIS dealer.