A/C COMPRESSOR, INSTALLATION INFORMATION
Perform Guided Fault Finding A/C compressor first start whenever a new A/C compressor is installed.
Only start engine after refrigerant circuit has been assembled.
After installing a new A/C compressor or fresh refrigerant oil has been filled into compressor (e.g. after blowing through the A/C system), turn ribbed belt pulley of A/C compressor 10 rotations by hand before starting the engine. This prevents damage to the A/C compressor.
If possible start engine only with a filled refrigerant circuit.
Note. The A/C compressor is always driven by the ribbed belt pulley (no A/C clutch). If the A/C compressor is blocked, the compressor shaft overload protection is activated. The blockage is mostly recognized by deformations/bumps on the ribbed belt pulley. In addition, the blockage can be recognized by the abraded rubber in the area of the ribbed belt pulley. The A/C compressor is equipped with a protected oil supply, this prevents A/C compressor damage in the event that the system is empty. This means that approximately 40 to 50 cm 3 of refrigerant oil remains in the A/C compressor. The engine may only be started when the refrigerant circuit is installed correctly. For example; if the refrigerant lines are not connected to A/C compressor, when the engine is running the A/C compressor may heat up (via internal heat generation) so much that the A/C compressor will be damaged. A/C compressor regulator valve -N280- is not activated when the refrigerant circuit is empty and the A/C compressor idles with the engine. If it is necessary to start the engine with a discharged refrigerant circuit: Refrigerant circuit must be fully assembled. At least 1/4 of the prescribed refrigerant oil must be in the A/C compressor. No not rev engine higher than 2000 RPM. The engine should only run as long as is absolutely necessary, maximum 10 minutes.
Note. Pay attention to the following when starting the engine for the first time after filling the refrigerant circuit
Start the engine with the A/C compressor switched off (the indicator lamp in the AC button is off) and wait until the idle RPM has stabilized.
Open an instrument cluster vent.
Select Lo on the Climatronic control module -E87- or Climatic.
Now switch on the A/C compressor (the indicator lamp in the AC button comes on) and let it run for at least 5 minutes with the engine running in idle.
INSTALLATION POSITION OF GLOVE COMPARTMENT COOLING CONNECTION
- Connection
- Valve