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Run following test:
Place vehicle out of the sun. A/C temp' at MAX .... blower speed low. ( Recirc' door closed.) Close all windows and doors. Insert temp' probe in center vents. Run engine at 1800 rpm. After some time temp should drop to 34F to 36F and CC then disengages and vent reading should climb to 38 F or 44 F and CC should engage and vent temp' drop to 34F to 36F again.
If Yes...system working as designed.
If No....Check if system over pressurized and pressure switch cutting CC...( If fitted and operational.)
Check blend doors are fully in Cooling position. Check Recirc' door fully closed.
Check cabin temp' sensor ( Ducted air into center dash small grill.')
Check belt slip at CC.
Check CC slip ( Check voltage and air gap.)
On your figures..Ii would prefer to see lower low side pressures. Minimum 20 psi but lower than 30psi.
Are you using a parallel flow condenser or OE original ?
Does aux fan run whilst CC engaged?
What Sandon are you running? Japanese or Chinese copy?
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