Sorry to hear your experience. I'm a avid no-1 Daikin user for R22 gas inverters. None come close to it. Of course the R410-a inverters are something else. I use a mixture of both as my house comes with ac pipes embedded. Only kids room use R410a as the pipe can easily change.

If you're in Klang valley, PM me and I'll send you my Daikin contact. He's reliable and honest and will tell you up front what should/must be done, can/cannot be done, etc. I learn a lot from him about AC and recommend him to friends and family whose feedback are nothing but positive.