Anyone know how to solve this problem?

I am having problem with one of the 1HP air conditioner unit from Panasonic. Problem started after about one month after installation.
It seems that it is noisy when the air swing is allow to swing.
Their technicians have made 5 attempts to rectify the problem and till now, the problem still persist.
It seems that they are using trial & error method. Every time, when they come, just apply some grease onto the moving parts and the next time, come and change the air vent. After using for a few days, after the grease dries up, the noise comes back.
Now, the warranty is about to expire...

Written to their Customer Care dept, then they called and want to try to apply grease and replace the air vent again. Really don't know when all these trial & error will end and problem solve.

Really regretted installing the Pana aircon. Some more went and installed 4 units. Include the older set (2 years ago), so, in total 5 units. 

Aiks... Just got Panasonic airconds installed for the whole house about a month back. 
Using a mix of the normal and EcoNavi models.... fingers crossed that everything works well.

Used Daikin aircond before at my parents place and that was one aircond that was forever giving me problems. From water leaks to air being not cold enough... it was a constant every couple of months nightmare. Had it changed to an older model Pana and used it a couple of years before i moved out of my parents place with no issues.

Aircond still going strong and cold even though i've not slept in that room in over a year. Maybe its a mix of the aircond manufacturers, the sellers and a lil bit of luck that determines a persons experience with a specific brand.