How many charge refrigeration to system?

I have a tandem compressor air condition
I need to change in how refrigation ?
discharge pressure, suction pressure
dischange coil temperture, suction coil temperture
evporating coil temperture
working in single compressor

Answer:
you need change in
dischange 280 psi suction 70 psi
dis coil temp 90 c suction coil temp 12 c

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