65 PSI TO 70 PSI IS THE SAME SUCTION PRESSURE FOR ALL TON SPLIT AC OR THERE IS DIFFERENT SUCTION PRESSURE IN ON CONDITION?

Doesn't matter how big the unit is, pressures remain the same. On a satisfied temperature, approximately 75 degrees, r22 should be around 65 psi. The hotter the house, the higher the pressure. Head pressure varies on outdoor temperature. 90 degrees outdoor temp, approximately 200 to 225 psi on high side.

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58 psi would be 32° so it needs to be above that on the suction(low) side and head pressure you dont want to be over 250 psi

there is no suction at all when the machine is off as the gas equalizes around the system
all you will read is the pressure of the gas in the system and that will tell you nothing
to read gas pressures you need to know the type of gas in the system , have gauges that can handle the high pressures and have two on a manifold so that you can read suction and high side pressure differences
That way you can see if the system is low on gas or over charged

68 to 75 depending on the heat load. same for all tonnages.

R22= 70-80psig
R410a=120-130psig
Depending on many variables such as blower speed, coils clean, indoor/outdoor temps.

carrier 2 ton ac gas pressure detail

pressure readings vary depending on temperature, humidity, and other factors such as coil condition (inside and outside coils) ducting, other mechanical issues. The is no absolute readings for any one type of system, that said a ball park reading with an outdoor temp of 90deg and an indoor temp of 78deg it would be around 65 to 70 psi low side and 150 to 210 psi high side.

65 psi is the ideal pressure remember its not exceede from this pressure.
and it is valid for all season

These numbers are a little high depsite the high ambient conditions.Amazingly enough ,automotive low side suction pressure will equal the degrees its putting out at the evaporator coil...for instance,70 psi low side pressure will produce about 70 degrees of cooling. At 300 psi on the high side(which is high) this is about as low as the suction pressure will go....you need it to go lower.I would probably be concerned with the freon level as a slight overcharge could boost these numbers.Poor air flow through the condenser can also create a higher head pressure than desired.If possible,I would evacuate and re-charge the system with the correct amount of 134a refrigerant. Try to get those pressures lower...about 250/50 would be a decent pressure value in this ambient condition.Verify good airflow through the coils and pay close attention to any foreign debris like plastic grocery bags or wrappers covering the coils...Ive even seen these make their way between the small gap between the condenser and radiator so use a light and inspect carefully for this.Air flow through that condenser coil is vital and any deficit there will create high head pressure which obviously causes high suction pressures....good luck

Your suction pressure is erratic, your max. pressure is to much high. You did not measure your unit current reading liquid line press. to complete the data. But the problem of your unit is not the compressor its the system. Try to reprocess the system flush the unit with nitrogen, isolate the capillary tube and flush it with nitrogen to insure that no restriction.