Landlord installed AC not cooling, now asking me to pay ₹3k+ for gas refill — what should I do?

Hi everyone, I’m a student based in Delhi and currently living in a rented flat.

I shifted here in July last year, and the owner had already installed an O General AC in the room. Since the beginning, the AC has never cooled properly and has been giving me trouble.

Recently it stopped cooling almost completely. When I contacted the technician who had originally installed the AC, he told me that there’s no gas left in the unit and claimed that no gas refill was done earlier, so I would have to pay ₹3,000+ to get it refilled/fixed.

My confusion is:

The AC belongs to the owner, not me.

It has not worked properly since the time I shifted in.

Now they’re implying that I should pay for the gas refill.

As a tenant, should I be responsible for paying this, or should the landlord cover the repair since it's their appliance?

Would really appreciate advice from people who’ve dealt with similar rental situations in Delhi.