TC reported cab A/C was blowing warm air. ~~~~~ #3667 Confirm cab a/c blowing warm air. Found liquid pipe oily, tightened pipe and replace insulation. LP:30, HP:200. Top up LP=50, HP=230. Monitor for 30min pressure maintain. Cab a/c cooling achieve-ok. Done by Saini/Haikel. 23/05/21.