How to do Manual transfer to the alternate source in STS630 ?

Follow the below steps : 
1 - Press the manual transfer button - 25 :
2 - Enter the password by following the
instructions on the display.
3 - validate the password by pressing the
grey function button  - 23 marked on the
screen.
LEDs  -24 and  - 27 flash.
After the transfer, the green LED - 27 goes
on.
The load is supplied by Source 2