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  1. Oil color problem

    Quote Originally Posted by Glenn Moore View Post
    Hi khaled
    2 questions
    1) How old is the system .?
    2) Has there been any new work on the system i.e. Pipe work ,brazing etc ?
    Having carried out many warranty strip downs on compressors and also investigated many system problems ,some of the following may help you find the cause of your oil problem.

    With the change from the old ***** gases to the new gases such as R404A,R134A, R407C etc meant also changing the type of lubricant from mineral oil to Polyoester

  2. Presure-Entalpy chart explained

  3. 9 superheat & subcooling scenarios

    Quote Originally Posted by nike123 View Post
    • LOW CHARGE = High superheat. Low suction pressure, indoor TD, subcooling, head pressure & compressor current draw.
    • OVER CHARGE = Low superheat. Normal indoor TD. High suction pressure, subcooling, head pressure & compressor current draw.
    • LOW INDOOR AIR FLOW = Low superheat & suction pressure. Low to normal head pressure. High indoor TD. High to normal subcooling. Not much effect on current draw.
    • MILD LOW OUTDOOR AIR FLOW = Low superheat & subcooling. High suction
  4. Extending torque wrench correctly

  5. What is the purpose of having the capillary tube soldered to the suction line.

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