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We have air cooling York chiller model YCHA 110, it has two systems with two reciprocating compressors, syst #1 = 60 ton, syst#2 =40 ton, when the chiller is running, after 5 minuites, compressor #1 tripping by oil pressure switch off due to liquid flooded in the suction line, also after 10 minuites the second compressor tripping by the same way due to same reason, we replaced the two thermostatic expansion valves, we adjusted superheat at 10 f, we retubed the cooler but the same problem is happened.
kindly help.