I purchased a Voltas split 5 Star rated AC about 3 years ago
After running for one season, the machine kept failing due to gas leaks from multiple holes. The service engineer attributed this to a manufacturing defect, the company refused to accept this explanation. Meanwhile I was left to swelter in the heat. The only solution offered by the company is to go for an Annual Maintenance Contract, at a substantial amount.
I would caution potential buyers against purchasing Voltas products.