Procedures

Refrigerant Circuit Repairs

There is a danger of ice-up.

Refrigerant and refrigerant oil will leak out if the refrigerant circuit has not been evacuated.

Refrigerant must be extracted before opening the refrigerant circuit. If the refrigerant circuit is not opened within 10 minutes after extracting it, pressure may build up in the circuit again. 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 (such as 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 (for example, noise or no output).

The procedure for flushing with R134a refrigerant is described in Refrigerant Circuit, Flushing with R134a.