Need help.

I have a new house under reno. I bought non inverter Panasonic deluxe R410a 1HP aircond. So when contractor ask me whether its inverter type, I told him no. Then now He is saying the pipe already pull for non inverter type, so cannot use R410a, but he can fill R22 gas to fill into my aircond which is supposed to use R410a.

Can this be done??