Refrigerant Circuit, Charging With Service Station
High voltage within the high voltage system. Danger of electric shock in the A/C compressor!
Disable high voltage system. Refer to the appropriate service information .
- The work procedure is always to be performed as described in the operating instructions for the A/C service station.
- Before pouring in refrigerant, correct the quantity of refrigerant oil. [For engine(s) BLV, CCTA, CBFA] Removal and Installation .
- The entire refrigerant charge can be added to either the high or low pressure side.
Charging the refrigerant circuit
-- Switch off the ignition.
-- Discharging refrigerant circuit using service station. Refer to REFRIGERANT CIRCUIT, DISCHARGING WITH SERVICE STATION .
-- Screw out handwheel at quick-release coupling adapter (to close it).
-- Allow refrigerant to flow into charging hose.
-- Tighten the handwheel on the quick-release coupling adapter without putting too much pressure on the valve and add the specified amount of refrigerant.
-- Switch off service station.
If A/C compressor was removed, it must be cranked by hand at ribbed belt pulley/freewheel approximately 10 rotations before bringing into operation for the first time. This prevents damage in the A/C compressor due to liquid when switching the A/C system on. If there is oil in the A/C compressor cylinder, it will be forced out.
-- Start engine with compressor switched off (version with A/C clutch).
-- Set compressor to minimum output, for example, "Econ" or A/C off mode (version with no A/C clutch with regulating valve).
-- Wait until idle speed has stabilized.
-- Switch on compressor and operate system for at least 2 minutes at idling speed.
-- If necessary, check pressures in refrigerant circuit using A/C service station.
-- Turn engine off.
-- Screw out handwheel on quick-release coupling adapter.
-- Disconnect charging hose from refrigerant circuit.
-- Screw protective caps back on.