Procedures

Refrigerant Circuit, Specialized Repairs

• Information for repairing vehicles with air conditioning and working with refrigerant can be found in ELSA under Heating-Ventilation-Air Conditioning; Air Conditioning with R134a Refrigerant

• Information for special tools and equipment when repairing vehicles with air conditioning can be found in ELSA under Heating-Ventilation-Air Conditioning; Air Conditioning with R134a Refrigerant

CAUTION!
There is a danger of ice-up.

Refrigerant leaks out if refrigerant circuit is not discharged.

Refrigerant must be extracted before opening refrigerant circuit. If refrigerant circuit is not opened within 10 minutes of extraction, pressure may form in refrigerant circuit due to evaporation. Extract refrigerant once more.

• Flush the refrigerant circuit with R134a refrigerant under the following conditions:

• In the event of dirt or other contamination in the refrigerant circuit.

• If vacuum reading is not maintained on evacuating a leak-free refrigerant circuit (pressure build-up due to moisture in refrigerant circuit).

• If refrigerant circuit has been left open for longer than normal (e.g. following an accident).

• If pressure and temperature measurements in the refrigerant circuit indicate the likelihood of moisture

• In the event of doubt about the amount of refrigerant oil in the circuit.

• The A/C compressor had to be replaced on account of internal damage (e.g. noise or no output).

The procedure for flushing with R134a refrigerant is described in ELSA in the repair information Heating/Ventilation/Air Conditioning; Air Conditioning with R134a refrigerant; Flushing the Refrigerant Circuit from Contaminants.

Information for repairing vehicles with air conditioning and working with refrigerant can be found in ELSA under Heating-Ventilation-Air Conditioning; Air Conditioning with R134a Refrigerant.

Information for special tools and equipment when repairing vehicles with air conditioning can be found in ELSA under Heating-Ventilation-Air Conditioning; Air Conditioning with R134a Refrigerant.