GF83.75-P-2000GI | Residual engine heat utilization system, function | 28.3.01 |
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning
Function
The residual engine heat utilization system allows the vehicle to be heated even when the ignition is switched OFF. To this end the system uses the residual heat of the engine. The residual engine heat is dissipated to the coolant and routed through the heat exchanger with the aid of the heating water circulation pump. The air drawn in by the blower motor is routed around the heat exchanger, whereby it is then warmed up. The heated air is then routed over the air outlets into the passenger compartment.
The residual engine heat utilization system can only be used when the ignition is switched OFF.
Once the Rest pushbutton ( ) on the AAC pushbutton control module (N22) has been pressed the following program sequence is run:
Blending air flaps are automatically controlled
Heating water circulation pump ON
The blower's control voltage is limited to a maximum value of 5 Volt.
End of program
Pressing the Rest pushbutton ( )
Timeout of 30 minutes period (repeated operation possible)
Protection against undervoltage at a battery voltage of less than 11 V (LED flashes)
Ignition ON
During the residual engine heat utilization function no function keys are accepted apart from the Rest pushbutton
( ) and the set point adjusters.
Referenced documents
- gf8310p2170gi Blower motor location/task/design/function
- gf8320p2108gc Heater core, location/purpose/function
- gf8320p2109gi Heating water circulation pump, location/task/function
- gf8340p2148gi Residual heat button, location / task / function
- gf8357p2112gi Blending air flap actuator motor, location/task/function