Working On Refrigerant Circuit
There is a risk of getting frostbite from the refrigerant.
When working on the A/C system, refrigerant under pressure can escape. Frostbite on the skin and other parts of the body is possible.
-- Wear safety gloves.
-- Wear protective eyewear.
-- Evacuate or drain refrigerant and open the refrigerant circuit immediately.
-- If more than 10 minutes elapse after extracting or draining the refrigerant and the refrigerant circuit has not been opened, extract or drain the refrigerant again. Pressure develops in the refrigerant circuit due to evaporation.
Flush the refrigerant circuit with refrigerant R134a / R1234yf under the following conditions:
If there is dirt or other contamination in the refrigerant circuit.
If the vacuum reading does not stay the same when evacuating a leak-free refrigerant circuit (pressure build-up due to moisture in the refrigerant circuit).
The refrigerant circuit has been left open for longer than normal (for example, after a collision).
If pressure and temperature measurements in the refrigerant circuit indicate that there is moisture in the refrigerant circuit.
If there is any uncertainty as to how much refrigerant oil is in the refrigerant circuit.
The A/C compressor had to be replaced due to internal damage (for example, noise or no output).
The procedure for flushing with refrigerant R134a / R1234yf can be found in ELSA under:
Vehicles with Refrigerant R134a
- Refer to the appropriate Service Information .
Vehicles with Refrigerant R1234yf
- Refer to REFRIGERANT CIRCUIT, CLEANING .
The notes for test equipment and tools for the repair on vehicles with A/C can be found in ELSA under:
Vehicles with Refrigerant R134a
- Refer to the appropriate Service Information .
Vehicles with Refrigerant R1234yf
- Refer to the appropriate Service Information .
Notes after opening the refrigerant circuit can be found in ELSA under:
Vehicles with Refrigerant R134a
Under certain conditions, the desiccant bag no longer needs to be replaced each time the refrigerant circuit is opened on A/C systems with refrigerant R134a. Refer to the appropriate Service Information .
Vehicles with Refrigerant R1234yf
Under certain conditions, the desiccant bag no longer needs to be replaced each time the refrigerant circuit is opened on A/C systems with refrigerant R1234yf. Refer to COMPONENTS, REPLACING .