Working On Refrigerant Circuit

Work on refrigerant circuit should only be performed in a ventilated rooms (workshops). Ensure that there are no workshop pits, basement staircases or shafts within a five meter circumference. Extraction systems are to be switched on. Note the information in the refrigerant-specific service information. Refer to A/C SYSTEM, GENERAL INFORMATION and Repair Information

Reason: 

The refrigerant coming out is not only colorless and odorless, but also heavier than air and thus displaces oxygen. If refrigerant gas still escapes even though all the safety precautions have been followed, there is a risk of suffocating in poorly ventilated areas and in workshop pits - even if the asphyxiation hazard is not noticeable.

Never weld or hard/soft solder components of a filled A/C system. This also applies to welding and soldering on the vehicle, if there is a risk that it may heat up components in the A/C system.

Reason: 

Exposure to heat creates considerable pressure in the system, which could cause it to burst.

Corrective Measure: 

Discharge the refrigerant circuit.

When servicing the A/C system, all open components and line connections are to be immediately re-sealed.

Reason: 

Moisture will penetrate into A/C system components if they are left open for a lengthy period. If this is the case, air conditioners cannot be refilled without having to replace parts of the system.

• Information about procedures using the A/C Service Station on vehicles with A/C. Refer to Working with A/C Service Station and Refrigerant Circuit .