General Information
WARNING:
Refrigerant
- Danger of freezing
→ Avoid contact with refrigerant.
→ Wear personal protective gear.
→ Observe the safety regulations for working on air-conditioned vehicles and handling refrigerant.
→ Observe the safety regulations for extraction and filling systems.
→ Observe the instructions for repairing air-conditioning systems and storing spare parts.
Information
Only use recommended air conditioning servicing equipment for R134a (see Workshop Equipment and Special Tools Information)
Information
- For all work on the air-conditioning system that necessitates opening the refrigerant system, the system contents must first be disposed of in accordance with regulations.
- Dirt and moisture must be kept out of the air-conditioning system pipes and hoses.
- Cleanliness must be ensured during all work.
- System components must never be cleaned on the inside with hot steam.
- Only use nitrogen for cleaning.
- When replacing a component, all openings must be closed off using suitable stoppers immediately after opening the system.
Information
- On air-conditioning service equipment with a transparent oil separator, read off and take note of the oil level before removing refrigerant.
- Do not carry out this step on empty air-conditioning systems (pressure gauge approx. 0 bar) because if you do, air will get into the refrigerant bottle.
- If the vehicle is cold, it may be necessary to repeat the suction procedure until all refrigerant has been removed from the air-conditioning system. This step is carried out automatically with some units.
Information
The desiccator must be replaced in the following situations:
- Refrigerant circuit is open for > 20 minutes.
- Amount of refrigerant extracted is < 30% of the required quantity.
- Refrigerant circuit has been open for an indefinite period of time (gradual leak, stone damage to condenser).
- Air-conditioning compressor has become blocked.
- Dryer cartridge is damaged.
- After opening the packaging and line connections (on a new desiccator), the desiccator must be installed within 20 minutes at the latest and the refrigerant circuit must be closed, evacuated and filled.
The desiccator must not be replaced in the following situations:
- If the components are closed off using stoppers immediately after opening the refrigerant circuit or if the refrigerant circuit is closed and evacuated within 20 minutes at the latest.