The Hitchai are not at all professional in after sales service. They have outsourced the service part for their A/Cs to various vendors and usually the customers are at the receiving end.
I logged a request for servicing, after numerous reminders the vendor, an authorised service partner of Hitachi, Shivam Services (Sarita Vihar, South Delhi) visited my place and mishandled the A/C. I lodged a complained and requested them to fix the issue but even after numerous exchange of mails and 1 month, the issue has not been fixed up till date.
Avoid purchasing Hitachi if you dont want to get harassed afterwards.