D. HVAC WITH ETC CONTROL PANEL HVAC is an electronic control unit known as the control panel having a built in algorithm to maintain the climate control system in the vehicle. It is capable of controlling the temperature, FAN speed, air-distribution settings in the passenger compartment and with the Auto button, the user can select all the above settings to be controlled automatically by the climate control algorithm. The layout of the knobs and pushbuttons on the control panel are as below. ETC VARIENT 1 ETC VARIENT 2 KNOBS DESCRIPTION: A HVAC with ETC control panel manages the climate control system, it is the driver’s interface to the system. The HVAC receives driver’s input signal and various input signals from sensors and controls the actuators to maintain driver’s desired settings. i. AC COMPRESSOR ON / OFF Press the AC compressor ON/OFF button to turn the air conditioning ON or OFF. ii. BLOWER SPEED CONTROL 1. Toggle the switch upside to increase the blower speed up to MAX (Speed 4), whereas downside would reduce the speed up to Min (Speed 1). Blower control shall indicate the control of the quantity of airflow, which is accomplished by controlling the speed of the blower fan. The Blower control shall happen either manually or through an automatic climate control algorithm iii. MAX DEFROST 1. This button directs the main airflow towards windscreen for faster defrosting (It also overrides any mode selection you may have made.) 2. When you turn off the button, the system returns to its former settings. On pressing this button the LED is illuminated indicating air distribution to max defrost mode is ON. CAUTION For your safety make sure you have a clear • view through all the windows before driving. HVAC WITH ETC 14
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