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Home >> Mercedes Benz >> 2021 >> Metris Van Cargo >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System (1 Of 3) -- 447 Chassis >> Basic Knowledge >> Auxiliary Heater Radio Remote Control Transmitter, Function - GF83.70-S-1000TRA

Auxiliary Heater Radio Remote Control Transmitter, Function - GF83.70-S-1000TRA

Model 447.7 

With Code HY2 (Radio remote control for auxiliary air heater) 

With Code HZ1 (Auxiliary heater (warm air)) 

With Code ZH6 (Marco Polo ACTIVITY) 

Model 447.8 

With Code HY2 (Radio remote control for auxiliary air heater) 

With Code HZ1 (Auxiliary heater (warm air)) 

With Code ZK7 (Equipment line MARCO POLO) 

View of warm air stationary heater radio remote control transmitter (A8/3) 

G16507596Courtesy of MERCEDES-BENZ USA

Function requirements for warm air stationary heater radio remote control transmitter, general 

Warm air stationary heater radio remote control transmitter, general 

The warm air stationary heater radio remote control transmitter can be used to control the auxiliary heater. The individual components of the stationary heater have not been tuned to each other in the factory. Teaching in is required prior to initial startup.

Upon activation of the warm air stationary heater radio remote control transmitter, this provides the following feedback via the indicator lamp:

Warm air stationary heater radio remote control transmitter heating process function sequence 

The function sequence is described in the following steps:

Function sequence for data transfer 

Upon pressing the button of the warm air stationary heater radio remote control transmitter, the button status of the air stationary heater radio remote control receiver (A49/6) is received and forwarded to the warm air stationary heater control unit (WLSTH) (N33/5). As a result, the operation of the stationary heater timer (N34) is reproduced.

Function sequence for starting heating process 

To start the heating process, the "button for activation/deactivation of warm air stationary heater radio remote control transmitter" is to be pressed. The indicator lamp flickers red and the status is "Heating off". With the OK button, the heating process is started. The indicator lamp signals the new status "Heating on" via the flashing of the indicator lamp.

Function sequence for ending heating process 

To end the heating process, the "button for activation/deactivation of warm air stationary heater radio remote control transmitter" is to be pressed. The indicator lamp flashes red and the status is "Heating on". With the OK button, the heating process is ended. The indicator lamp signals the new status "Heating off" via the flickering of the indicator lamp.

  Overview of system components for auxiliary heater   GF83.70-S-9993TRA