Thank you for the replies. Happy new year to all here. 

Today, LG Dream service came to check. They said gas was at 90 and too high. So they level it off to 70.
Then they took a pen and reset my remote control.  They said air conditioner is working well.  After finishing their work, I invited them to another room, similar size with same windows coverage but with more sunlight shining as it was morning.  They were surprised and one said they can immediately feel the difference when the door was opened for them to enter. It was a Toshiba Daisekai 1 hp running which never been serviced since new. The blower fan and filter gets cleaned by my father a few times a year and been re-gassed once since new which was more than a year ago.
So I asked them how come my Toshiba is able to make that room colder within half an hour whereas the 6 months old LG takes hours during the day to cool the room?  The man with all smiles said the Toshiba is more expensive so better quality so that's why!  Any truth in this?