Hi guys, I just join this forum. I am a rig electrician, currently position on West Malaysia. I have a problem with my main air con that use Carlyle 5H-60 compressor. The system always tripped by differential pressure switch. No different pressure suction and oil that makes the system tripped. We already changed out the oil pump, but the result remain the same. Is there any possibilities except the oil pump that cause this problem? Thanks in advance.