The high and low pressure lines on the compressor are reversed (Worksheet 6)

Note

If the air conditioning system is equipped with a compressor with constant displacement (F), it shall be possible to determine that the compressor only connects on rare occasions and for a few seconds. If the air conditioning system is equipped with a compressor with a suction pressure regulator (V), it shall be possible to determine that the compressor is switched rapidly on and off.

Error with connection of the refrigerant lines to the compressor.

  1. Check if the suction pipe (1/2″) is connected to “SUC” on the compressor and the high pressure line (13/32″) on “DIS” on the compressor.
  2. If the above lines are reversed, perform an evacuation of the refrigerant from the air conditioner.
  3. Correct connection of the refrigerant lines on the compressor.
  4. Removal of the non-condensible gas in the air conditioning system, which means that the vacuum pump is kept running for at least 30 minutes. Important: check the degree of evacuation!
  5. New filling of the air conditioning system with the recommended refrigerant. The amount of oil sucked out must be replenished again (refer to the assembly instructions or the table of refrigerant quantities).

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