Digital Activation Independent Park Heater/Auxiliary Heater

Digital Activation Independent Park Heater/Auxiliary Heater

Activation via telegrams on K-bus
Telegram sequence for auxiliary heater ON:
- The heating/air conditioning control unit recognizes the need for heating and sends the AUXILIARY HEATER ON telegram to the independent park heater/auxiliary heater.
- The independent park heater/auxiliary heater sends the AUXILIARY HEATER ON feedback to the heating/air conditioning control unit and starts up.
- If no feedback is received from the independent park heater/auxiliary heater, the AUXILIARY HEATER ON telegram is sent twice at 1 second intervals. Corresponding fault code entry is made in the fault code memory if all 3 start attempts are unsuccessful.

Telegram sequence for auxiliary heater OFF:
- The heating/air conditioning control sends the AUXILIARY HEATER OFF telegram to the independent park heater/auxiliary heater.
- The independent park heater/auxiliary heater sends the AUXILIARY HEATER OFF feedback to the heating/air conditioning control unit and assumes run-on mode.
- If no feedback is received from the independent park heater/auxiliary heater, the AUXILIARY HEATER OFF telegram is sent twice at 1 second intervals. Corresponding fault code entry is made in the fault code memory if all 3 stop attempts are unsuccessful.

Telegram sequence for independent park heating ON:
- The MID or on-board monitor sends the INDEPENDENT PARK HEATING ON telegram via IKE to the heating/air conditioning control unit
- The heating/air conditioning control sends the AUXILIARY HEATER ON telegram to the independent park heater/auxiliary heater.
- The independent park heater/auxiliary heater sends the AUXILIARY HEATER ON feedback to the heating/air conditioning control unit and starts up.
- The heating/air conditioning control unit receives the AUXILIARY HEATER ON feedback from the independent park heater/auxiliary heater.
- If no feedback is received from the independent park heater/auxiliary heater, the AUXILIARY HEATER ON telegram is sent twice at 1 second intervals. Corresponding fault code entry is made in the fault code memory if all 3 start attempts are unsuccessful.

Telegram sequence for independent park heating OFF:
- The MID or on-board monitor sends the INDEPENDENT PARK HEATING OFF telegram via IKE to the heating/air conditioning control unit
- The heating/air conditioning control sends the AUXILIARY HEATER OFF telegram to the independent park heater/auxiliary heater.
- The independent park heater/auxiliary heater sends the AUXILIARY HEATER OFF feedback to the heating/air conditioning control unit and assumes run-on mode.
- The heating/air conditioning control unit receives the AUXILIARY HEATER OFF feedback from the independent park heater/auxiliary heater.
- If no feedback is received from the independent park heater/auxiliary heater, the AUXILIARY HEATER OFF telegram is sent twice at 1 second intervals. Corresponding fault code entry is made in the fault code memory if all 3 stop attempts are unsuccessful.

Telegram sequence for Telestart:
- The wavetrap receives the telestart signal and converts the HF signal into an LF signal.
- The telestart receiver sends a signal to the independent park heater/auxiliary heater.
- The independent park heater/auxiliary heater sends the AUXILIARY HEATER ON message to the heating/air conditioning control unit.
- The heating/air conditioning control unit sends AUXILIARY HEATER ON to the independent park heater/auxiliary heater.
- The independent park heater/auxiliary heater sends the AUXILIARY HEATER ON feedback to the heating/air conditioning control unit and starts up.
- If no feedback is received from the independent park heater/auxiliary heater, the AUXILIARY HEATER ON telegram is sent twice at 1 second intervals. Corresponding fault code entry is made in the fault code memory if all 3 start attempts are unsuccessful.

Telegram sequence in the event of faults in the independent park heater/auxiliary heater:
- The independent park heater/auxiliary heater sends a fault message AUXILIARY HEATER OFF to the heating/air conditioning control unit.
- The heating/air conditioning control unit sends AUXILIARY HEATER ON to the independent park heater/auxiliary heater.
- The heating/air conditioning control unit waits for the reply AUXILIARY HEATER ON from the independent park heater/auxiliary heater.
- The AUXILIARY HEATER OFF telegram is sent globally once the AUXILIARY HEATER OFF feedback is received from the independent park heater/auxiliary heater.
- If the fault message AUXILIARY HEATER OFF is sent repeatedly by the independent park heater/auxiliary heater, the AUXILIARY HEATER ON is sent twice at 1 second intervals. Corresponding fault code entry is made in the fault code memory if all 3 start attempts are unsuccessful.

Telegram sequence in the event of fault lock-out in the independent park heater/auxiliary heater:
- The independent park heater/auxiliary heater sends a fault lock-out message AUXILIARY HEATER OFF to the heating/air conditioning control unit.
- The BMW DIS Service Tester sends the CANCEL FAULT LOCK-OUT telegram to the independent park heater/auxiliary heater or the fuse for the voltage supply to the independent park heater/auxiliary heater is isolated for 10 seconds.
- The independent park heater/auxiliary heater sends the AUXILIARY HEATER READY telegram to the heating/air conditioning control unit.