A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
‹› The duty cycle is determined by the ratio of impulse width - A - and signal distance - B -.
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The impulse width of the square-wave signal changes depending on the Climatronic control module (J255) control head setting and the
environmental conditions (duty cycle between 100% and larger than 30%, the A/C Compressor Regulator Valve (N280 ) is activated so the
compressor output necessary to reach the specified temperatures is achieved).
‹› In "Auto" operating mode and with "AC on" (indicator lights in buttons light up) and temperature preselect at "Lo" setting, the A/C Compressor
Regulator Valve (N280) is activated in such a way that the maximum permitted voltage of approximately. 0.65 A flows via the A/C Compressor
Regulator Valve (N280) (maximum compressor output).
‹› In control mode, actuation time is governed by required cooling output and vehicle electrical system voltage, for example. It is however always of
sufficient duration to achieve a mean current of 0.3 A.
‹› A/C Compressor Regulator Valve (N280) electrical test. Refer to => [ A/C Compressor Regulator Valve, Electrical Test ] See: A/C Compressor
Regulator Valve, Electrical Test