A/C COMPRESSOR INSTALLATION INFORMATION
Start the engine only after assembling the refrigerant circuit.
After installing a new A/C compressor or fresh refrigerant oil has been filled into compressor (for example, 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.
Start the engine only when the refrigerant circuit is filled.
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. Do not rev engine higher than 2000 rpm. The engine should run only 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 engine with A/C compressor switched off ("ECON" mode) and wait until the idling speed stabilizes.
Open the instrument panel vents.
Select the temperature setting "Lo" on the Front A/C display control head -E87-.
Turn on the A/C compressor ("AUTO") and let the engine run for 5 minutes at idling speed.
REMOVAL
Perform the following work first
Turn off all electric consumers.
Switch off the ignition.
Remove the key.
Extract refrigerant using ROB 134APF.
Note. Environmentally hazardous draining of refrigerant is an offense punishable by law.
Remove the rear bumper. Refer to Removal and Installation .
Remove the lock carrier. Refer to Removal and Installation .
| WARNING | There is a danger of ice-up. Refrigerant leaks out if refrigerant circuit is not discharged. Refrigerant must be extracted before opening the refrigerant circuit. If refrigerant circuit is not opened within 10 minutes of extraction, pressure may form in refrigerant circuit due to evaporation. Extract refrigerant once more. |
Remove the refrigerant lines on the condenser (12 ± 1.8 Nm) and seal off.
Remove the bolts -6- and -8- and the condenser.
INSTALLATION
Installation is carried out in the reverse order while noting the following
Note. Follow the assembly sequence, tighten bolt -6- first, and then the bolts -8-.