I sure hope it doesn't run on freon. That junk was banned years ago, but there's probably still some available on the black market. How would we find out what it actually uses, discover if it's low, and refill it?
No idea, but around here any A/C servicing is left to the professionals.
There probably is information and procedure for doing that, but it's most likely in the service manual for your particular A/C unit.
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