Short Cycling Of Refer Compressor. Suction pressure high high superheat at evaporator outlet. Low pressure controller differential set too close.

Short cycling of refrigeration compressor short cycling means the compressor is repeatedly running for a few seconds and then cutting off. Short cycling is a symptom of a potentially wide range of causes. Short cycling occurs in your compressor when a mechanical failure is causing the run times to terminate prematurely and since set point has not been achieved it restarts shortly afterward thus requiring more compressor on time to compensate.
Sometimes short cycling occurs due to a system fault and sometimes it occurs due to a mismatch between system capacity and load cooling or heating too quickly.
Low pressure controller differential set too close. Low pressure controller differential set too close. While your air compressor short cycles you are paying a 20 50 premium for compressed air. This is probably due to the start relay and or start capacitor you mentioned one capacitor value 60 120mfd.