My technician visited me a few days back....He charged the gas again. I started monitored the vent temperature and it has dropped minimum to 15degC and not below then that. I think it still need improvement. I also called the person named as Zaheer. Contact details shared above. He came but i did not get the AC checked by him as my technician just charged the AC a night before.
Also my own room AC which is same Orient 1.5T inverter also does not drop the vent temperature below 17degC. It is installed in upper portion with a room exposed direct to Sunlight. Thinking to call Zaheer. HE seems professional enough. I had a telephonic conversation with him before his visit and he seems knowledgeable enough.
Now it feels like my mother room AC is working good(still need improvement) and mine is not.
Ill ask him to vacuum the complete system and then recharge the gas.