Here is a copy of Standard ratings for this compressor.
Is that an air cooled condenser that you have and is it located above the the chiller barrel.
Have you considered calculating your total heat load and verified that the condenser is properly sized for your application. How about the piping arrangement. Are there suction risers in place and possibly double discharge risers. Have you considered velocity of piping and is it sized correctly.

Standard Rating Spec.pdf


Troubleshooting is not part of the repair................understand the symptoms and you will find a solution.