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It appears you have a packaged unit self contained system What are you trying to determine?
Here is what the code means:
564A is a small packaged unit
N means 208/230 volts
X means not equipped for fuel burning
060 is 60,000 btus or 5 ton unit
AA is a US Standard unit
F means it can accept an economizer.
Is it the compressor that he is saying is bad?
There should be a model on the compressor itself that we can cross reference if you can get that number
First model you posted was 564ANX0600AAAF
If there is a 3 n that model it is a 36000 or 3 ton.
THis is model on unit though.The will be a different model on the compressor itself.May be hard to find OEM part number due to age but number should be on compressor.
However if compressor is frozen it is nt bad.A defective compressor will not make ice.