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Hello, Even with your model number, I can not find what type of refrigerant your unit is using. If you can look at the name plate or on a sticker on the outdoor unit, It might indicate there what type of refrigerant it is using.
If it says there R-22. then on cooling mode, low pressure would be around 60 psi and hi pressure would be around 250 psi.
If it says R-410. then it could be an inverter type and depending on the capacity of the motor while cooling, it would vary because the speed of the compressor varies as well. It should be between 90 psi-140 psi on low pressure and 260 psi-300 psi on hi pressure.