Digital Activation of Independent Park Heater/Auxiliary Heater

Digital Activation of Independent Park Heater/Auxiliary Heater

Activation via telegrams on K-bus

Telegram sequence for auxiliary heater ON:

• The heating/air conditioning control unit recognises 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 an interval of 1 second. A 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 after-run mode.
  
• If no feedback is received from the independent park heater/auxiliary heater, the AUXILIARY HEATER OFF telegram is sent twice at an interval of 1 second. A 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 an interval of 1 second. A 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 after-run 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 and interval of 1 second. A 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 an interval of 1 second. A 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 an interval of 1 second. A 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.