Even I purchased Daikin 1.5 Ton 5 Star ac in March and faced similar experience with installation, they did not vacuum and said that it is not necessary as it is brand new, made a big hole in the wall and do not fill it up with white cement, and the ODU is vibrating and making buzzing noise when compressor load is between 70-90%. The guy came wearing Daikin shirt but I'm sure they are third party service.
The remote is so finicky, it has to be held in a specific angle and not too far for it work compared to LG and Lloyd in my other rooms and remote display is dim if using old battery, same batteries work fine in all other brand ac remotes. Daikin does not even provide batteries, manual or power cable(needed 5m 3 core cable costing 500).
The display on the IDU needs to be turned on every time you turn on the ac. I like to run the ac in econo mode but remote does not remember the setting, so have to turn it on everytime unlike LG which remembers the setting. I wrote a long review on Flipkart but they don't post it so had to write a 2 line review to get it published.
I am also looking to buy another ac but won't be choosing Daikin, decided to go for Bluestar or LG.