ADDITIONAL INFORMATION FOR VEHICLES WITH A/C COMPRESSOR WITHOUT A/C CLUTCH, (ONLY WITH A/C Compressor Regulator Valve -N280-)

The engine can be started only after the refrigerant circuit has been completely assembled (the A/C compressor runs continuously).
If the engine has to be operated with the refrigerant circuit empty, only do so for as long as absolutely essential and avoid high engine speeds.