Functional networking
In the following illustration, the functional networking for the integrated heating and air conditioning system (IHKA) is displayed by using an example.
| Item | Explanation |
|---|---|
| 1 | Refrigerant pressure sensor |
| 2 | Electric auxiliary heater |
| 3 | Auxiliary water pump |
| 4 | Refrigerant shutoff valve (interior climate) |
| 5 | Automatic air recirculation control sensor |
| 6 | Body Domain Controller |
| 7 | Power distribution box Life module |
| 8 | Integrated automatic heating/air conditioning system (IHKA) |
| 9 | Ventilation temperature sensor |
| 10 | Evaporator temperature sensor |
| 11 | Footwell temperature sensor |
| 12 | Rejector circuit, rear window defogger |
| 13 | Wave trap 2, heated rear window |
| 14 | Heated rear window |
| 15 | Flap motor |
| 16 | Air conditioning compressor (electrical) |
| 17 | Control panel for audio mode/heating and air conditioning system |
| 18 | Blower output stage |
| 19 | Blower motor |
| 20 | Rain-light-solar-condensation sensor |
| 21 | Electrical Digital Motor Electronics (EDME) |
The following illustration shows the functional networking for the heat pump circuit.
| Item | Explanation |
|---|---|
| 1 | Auxiliary water pump |
| 2 | Refrigerant pressure temperature sensor |
| 3 | Refrigerant shutoff valve between air conditioning compressor (electrical) and capacitor |
| 4 | Refrigerant shutoff valve between capacitor and dryer flask |
| 5 | Refrigerant shutoff valve between air conditioning compressor (electrical) and heat pump heat exchanger |
| 6 | Temperature sensor of heat pump circuit |
| 7 | Electric auxiliary heater |
| 8 | Expansion valve (controlled electrically) for the evaporator in passenger compartment |
| 9 | Refrigerant shutoff valve between air conditioning compressor (electrical) and capacitor |
| 10 | Body Domain Controller |
| 11 | Power distribution box Life module |
| 12 | Control unit of the integrated heating and air-conditioning system (IHKA) |
| 13 | Refrigerant pressure temperature sensor |
| 14 | Expansion valve (controlled electrically) for the cooling loop in the high-voltage battery unit |
| 15 | Expansion valve (controlled electrically) for the heat pump heat exchanger |
| 16 | Temperature sensor of heat pump circuit |
| 17 | Temperature sensor of heat pump circuit |
| 18 | Heat pump controller |