Failure of the component
If the left rear air conditioner control panel fails, the following behavior is to be expected:
- Malfunction during operation:
- The current settings are retained.
If only the temperature selector wheel or the button for the manual variation of the amount of air or both malfunction, the respective current settings of the relevant components are retained.
If only the LED display malfunctions, the HKA control unit is no longer to activate the LEDs for the display of the selected amount of air.
- No changes are indicated for the temperature selector wheel and for the button for manually varying the amount of air.
- Fault entry in the HKA control unit
- The current settings are retained.
- Malfunction is determined upon start-up:
- The setting at the temperature selector wheel is internally signalled as invalid. The mixing flap motor and the air distribution flap motor are no longer activated. The flap motor thus remain in their respective parked position. The parked position is a definite position to which a flap motor is driven after the vehicle is stopped and after a specified waiting period (stored in the memory module of the HKA control unit). The flap motors are reinitialized to this parking position after starting up.
- Fault entry in the HKA control unit
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