Industrial Refrigeration System DesignTroubleshooting and maintenance

I need an engineer in the field of refrigeration and ice factories. He has extensive knowledge and experience in the operation of each part of the system and PLC programming for the ice factory system. Because we want to program the PLC to be compatible with the Bitzer compressor. We will attach an explanatory video for him to determine the fault and problems that we faced, including what is the reason for the refrigerant oil not returning