GF83.70-P-3057GZ Activate Heater Immediately With Radio Remote Control, Function

GF83.70-P-3057GZ Activate Heater Immediately With Radio Remote Control, Function
- Only ECE-cars

Component Identification:

Function requirements
^ Circuit 30
^ Sufficient remaining quantity of fuel in tank

Function
When the "ON" button on the stationary heater transmitter is pressed, the request is sent per radio to the roof antenna module. This forwards the signal to the stationary heater receiver via the telephone antenna splitter. After the received signal is checked, it is transmitted to the STH control unit. This then initiates the "Ventilate or heat" query at the control and operating unit via CAN- B. Depending on the equipment, the control and operating unit then determines the current interior temperature via the:
^ In-car temperature sensor (N22b1)
(with code (580) Automatic air conditioning)
^ In-car temperature sensor (N22/7b1)
(with code (581) Comfort automatic air conditioning)

Depending on the determined interior and outside temperatures, the control and operating unit then decides between heat or ventilate and sends the decision to the stationary heater control unit.

During operation, the control and operating unit can switch over between heating and ventilating any number of times to obtain the desired target temperature irrespective of outside temperature and solar radiation. Visual confirmation is provided by an indicator lamp in the STH switch:
^ Blue: Vehicle is ventilated
^ Red: Vehicle is heated

HEATING
The metering pump is actuated to supply fuel and the heater unit starts heater operation.
To enable the interior to be heated up faster, the heater unit regulates the flow of coolant between the small and large coolant circuit to match temperature by way of the stationary heater switchover valve.
The coolant circulation pump ensures that the temperature- controlled coolant is circulated in the coolant circuit. With a sufficient temperature, the control and operating unit actuates the blower motor via the blower regulator.

VENTILATION
During stationary ventilation only the blower is actuated in the vehicle.
The control and operating unit actuates the blower motor via the blower regulator.

Feedback (up to 31.5.07)
The indicator lamp in the stationary heater transmitter may display the following:
^ Indicator lamp (green or red) is continuously on for 2 s: Correct wireless connection to the vehicle has been established. \
^ Indicator lamp (green or red) flashes for 2 s: Correct wireless connection to the vehicle has not been established. \
^ Indicator lamp (orange) is continuously on for 2 s before the green or red signal (regardless whether it flashes or is continuously on):
The battery in the stationary heater transmitter is weak but transmission is still possible.
^ Indicator lamp (orange) flashes for 5 s: The battery in the stationary heater transmitter is too weak for transmission.

When switched on, the signal on the stationary heater transmitter is confirmed with a green signal, when switched off by a red signal.

Feedback (as of 1.6.07)
The stationary heater control unit reports the operating condition back to the stationary heater transmitter. Possible displays:
^ "FAIL": No wireless connection or heater operation not possible (note corresponding symbol)
^ "ON": Stationary heater activated
^ "OFF": Stationary heater deactivated

Operating time for heater and ventilation
In the basic setting, the maximum heating time is 50 min. It is possible to change it to between 10 and 60 min in 10 min. increments via diagnosis.
The maximum ventilation time is limited to a maximum of 50 min. in the basic setting, as is the heating time, unless a shortening factor was set via diagnosis.

The following shortening factors can be set:
^ Factor 1: ventilation time = 3/4 heating time
^ Factor 2: ventilation time = 1/2 heating time
^ Factor 3: ventilation time = 1/4 heating time

The range of the stationary heater transmitter is approx. 300 m, but it can also be reduced through external influences