Arrived onsite and checked in with security. Met up with point of contact Joe and commenced to roof top with Trane condenser for shop split system. Unit would run and shut off. Found oil on compressors. Hooked up gauges and ran system. System tripping on high head not low pressure. Climbed up and found unit had bad CFM. Will quote out new CFM replacement. Went to get more info off of Liebert condenser CFM that I was told was bad by point of contact. Found that the unit has a fan speed control for that specific fan. Adjusted speed control slightly and fan ramped up. Liebert split system does not need new CFM motor. Went in and attempted to clear high head press alarm on Liebert. Found that compressor 1 waa out on High Pressure alarm but had 7.7 psi refrigerant in it. Bypassed high pressure safety and compressor ran. Shut unit down. Pressurized system with nitrogen do perform leak search. Found no leaks. Released nitrogen and pressurized system with nitrogen to perform tightness test.