SSP 275 Phaeton Air - Volkspage

Design and functionCompressor temperature sender G290(overheating protection)Compressor temperature senderTo ensure system availability, compressortemperature sender G290 is attached to thecompressor cylinder head.The control unit J197 shuts the compressor downand inhibits starting when a max. permissiblecompressor temperature is exceeded.275_067Self-levelling suspension system pressuresender G291The pressure sender G291 is integrated in thevalve unit and monitors pressure in the pressureaccumulator and the air springs. Information onaccumulator pressure is required to makeplausibility checks on the up-control functionsand perform self-diagnosis. The individualpressures of the air springs and the pressureaccumulator can be determined by activating thesolenoid valves accordingly.Self-levelling suspensionpressure senderpSolenoid valveThe individual pressures are measured whileevacuating or filling the air springs or thepressure accumulator. The pressures determinedin this way are stored and updated by the controlunit.Accumulator pressure is additionally determinedevery six minutes (updated) during vehicleoperation.G291 generates a voltage signal proportional tothe pressure.PressureaccumulatorSolenoid valveblock275_06852