Removing Electric Air-Conditioning Compressor
- Electric shock
- Short circuit
- Fire
- Explosion
→ Only appropriately trained and authorized persons are permitted to work on high-voltage vehicles and components.
→ Required qualification: High voltage technician or high voltage expert.
→ Observe national requirements and legislation for this work.
→ Always use insulated tools, e.g. > VAS 6883 - Insulated Tool Set when working on these components.
→ Observe general warning notes for working on the high-voltage system.
> 2X00IN GENERAL WARNING NOTES FOR WORKING ON THE HIGH-VOLTAGE SYSTEM
- 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.
- Risk of moisture getting into the refrigerant system.
- Risk of contaminating the refrigerant circuit.
- Risk of saturation and irreparable damage to desiccator.
- Irreparable damage to the desiccator can damage the compressor and evaporator.
→ After opening the refrigerant circuit, close off the refrigerant lines/connections immediately using the relevant stoppers. To avoid contaminating the refrigerant circuit, the stoppers for the different refrigerants must be stored and used separately.
→ The desiccator must be replaced if the air humidity is high and if the refrigerant circuit is left open for a long time.
Information
Working on the refrigerant circuit:
When removing components, close off all openings immediately using commercially available stoppers.
Store air-conditioning system components in a dry and closed-off area.
When fitting components, do not remove the stoppers until shortly before installation.
Likewise, do not remove the protective foil from the desiccator until just before installation. The desiccator absorbs moisture from the air and is then useless.
Do not carry out repairs in the open during damp weather.
The desiccator should be replaced as soon as one component of the air conditioning system has been replaced or if the air conditioning system was open for > 20 minutes.
Moisture in the refrigerant circuit not only leads to poor cooling, but oversaturation can also cause the desiccator to disintegrate and contaminate the air-conditioning system from inside. This can result in expensive and complicated repairs.
Check sealing rings on the refrigerant lines for damage and replace them if necessary.
Before re-installing these air-conditioning system components, flush them out with nitrogen.
Use a pressure reducer when working with nitrogen.
Evacuate the refrigerant circuit according to instructions.
- Release electric plug connection -2-
on electric air-conditioning compressor -1-
and pull it off. -Arrow-
Electric plug connection for air-conditioning compressor
- Unclip clip -4-
from high-voltage line -3-
on the holder.
High-voltage plug connection on air-conditioning compressor
Information
Handling high-voltage lines:
- Do not support yourself or your tools on high-voltage lines and their components.
- Work involving metal-removing, deforming and sharp-edged tools close to high-voltage components and lines is prohibited.
- Work involving heat sources such as welding, soldering, hot air and thermal bonding close to high-voltage components and lines is prohibited.
- High-voltage lines must not be extensively bent or kinked.
- A visual inspection of the high-voltage connectors must be performed before installing the high-voltage lines. If there are signs of damage to the connectors, contacts and seals, the high-voltage line must be replaced.
- In the event of queries or uncertainties, consult the relevant high voltage technician.
- Release high-voltage plug connection -2-
on electric air-conditioning compressor -1-
and pull it off. -Arrow-
High-voltage plug connection on air-conditioning compressor
Information
During removal: Close off refrigerant lines and connections using suitable stoppers.
During installation: Do not remove stoppers from refrigerant lines and connections until shortly beforehand.
- Unscrew screws -3-
securing refrigerant lines -2-
to electric air-conditioning compressor -1-
and pull off refrigerant lines. -2-
Refrigerant lines on air-conditioning compressor
- Unscrew screw -3-
securing equipotential bonding line -2-
to electric air-conditioning compressor. -1-
Equipotential bonding line to air-conditioning compressor
Screw -3- is accessible via front right wheel housing.
- 5.1 Turn steering wheel to the left.
- Unscrew nuts -3-
securing air-conditioning compressor holder -1-
to decoupling elements. -2-
Electric air-conditioning compressor holder to decoupling element
- Remove air-conditioning compressor in an upward direction.