| This high-pressure sender -G65- is fitted in place of the air conditioning system pressure switch -F129-. |
| When voltage is applied to the high-pressure sender, it generates a square wave signal, or data telegram. This signal changes with the pressure in the system. |
| Using this signal, the control units that are connected in succession (radiator fan control unit, engine control unit, operating and display unit for Climatronic air conditioning system -E87- or Climatronic control unit -J255- etc.) calculate the pressure in the refrigerant circuit and actuate the refrigerant radiator fan, the engine radiator fan, the air conditioning system magnetic coupling -N25- accordingly and/or alter actuation of the A/C compressor regulating valve, air conditioning system -N280-. |
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