i am a maintenance supervisor, i have knowledge all of the maintenance items repair & teach [ all air conditions repairing , :window a/c ,splits a/c ,mini splits ,packages ,chillers ,F.C.U, A.H.U, controls wiring, over handing all-kinds of compressors,all cold rooms repair, all AUTO air conditions repair,all refrigerators repair,all electrical items repair,all hot water repair, all plumbing worker & bathroom fittings fixing.#chathura SLMT