Working On Refrigerant Circuit
There is a risk of getting frostbite from the refrigerant.
Refrigerant can come out under pressure when working on the A/C system. Frostbite on the skin and other parts of the body is possible.
-- Wear safety gloves.
-- Wear protective eyewear.
-- Extract refrigerant and open the refrigerant circuit immediately.
-- If more than 10 minutes elapse after extracting the refrigerant and the refrigerant circuit was not opened, extract the refrigerant again. Evaporation can cause pressure to develop in the refrigerant circuit.
Flush the refrigerant circuit with refrigerant 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 R1234yf can be found in ELSA under:
- 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:
- Refer to TOOLS AND TESTING EQUIPMENT .
Notes after opening the refrigerant circuit can be found in ELSA under:
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 .