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A4 Cabriolet Mk2

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Operating and ON time of auxiliary heater, number of preheating cycles and quantity of fuel used in auxiliary heater
   
Display zoneDisplay
1Auxiliary heater operating time in hours
t  Display = 0 ....XXXXX
–  Auxiliary heater operating time with this control unit (full load and part load operation)
2Auxiliary heater operating time (on time) in hours
t  Display = 0 ....XXXXX
–  Auxiliary heater operating time with this control unit (full load/part load operation and control interval)
3Number of auxiliary heater preheating cycles (starting operations)
t  Display = 0 ....XXXXX
–  Display shows the number of auxiliary heater starting operations (preheating cycles) with this control unit.
–  If no flame is generated on first starting attempt and starting has to be repeated, this classes as a separate preheating cycle (display is not incremented by one, but rather by two)
4Quantity of fuel in litres used in auxiliary heater
t  Display = 0 ....XXXXX
–  The quantity of fuel is calculated on the basis of metering pump -V54- actuation by the auxiliary heater control unit -J364- (approx. 0.03 cm3 per metering pump stroke)

  Note
t  The values displayed in zones “1” to “4” relate to the total auxiliary heater ON time. The counter starts at the auxiliary heater control unit -J364- production stage with “0” and cannot be erased or entered in the new control unit following control unit replacement.
t  Display zone “1” shows the actual operating time (auxiliary or supplementary heating).
t  In the case of an auxiliary heater control unit -J364- with which the auxiliary heater was activated for less than 1 hour or which has used less than 1 litre of fuel, the value shown in display zones “1” and “4” is “0”.
t  Display zone “2” shows the time during which an activation signal (from the control unit in dash panel insert -J285- or the operating and display unit, Climatronic control unit -J255- of the air conditioner/heater) was applied to the auxiliary heater control unit -J364- (auxiliary heater operation or control interval).
   

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