BUS BODY ELECTRONICS Contents List of figures List of Tables Introduction Intended Use Symbols used Description of the control panel Display description Usage Turn ON Turn OFF Driver’s workplace functions 2.3.1 Adjust Temperature 2.3.2 Adjust blower speed 2.3.3 Adjust air flow direction /defrost function 2.3.4 Toggle between fresh air and air recirculation Passenger compartment functions...
BUS BODY ELECTRONICS 1. Introduction 1.1 Intended Use The SC1000 is a device designed to control HVAC components (heating, ventilation, air -condi- tioning) for buses, e.g. roof-top air-conditioning systems, heaters etc. It comprises always of a control panel (control device with human-to-machine interface) which is integrated into the dashboard, and of one or more substations, which are controlled by means of the control panel.
BUS BODY ELECTRONICS A substation is a control device with power outputs for the control of all the components inte- grated in the AC unit. Figure 2 - SC1000 Substation...
BUS BODY ELECTRONICS 1.3 Description of the control panel Figure 3 - SC1000 Control Panel Driver’s seat Passenger Compartment 5. Fresh air / air recirculation Reheat (dehumidify) 1. Fresh air / air recirculation but- button (optional) button (optional) 6. Blower speed button 10.
BUS BODY ELECTRONICS 1.4 Display description Figure 4 - SC1000 Display Screen A. Indicated value J. Heater is on B. Appears if the lowest adjustable room K. Fresh air flaps open temperature is reached C. Is indicated with the setpoint tempera- L.
BUS BODY ELECTRONICS 2. Usage 2.1 Turn ON Switch on the ignition. The control panel starts automatically. The current software version (1.0) and the current release ap- Figure 5 - SC1000 Release pear on the display (Fig.5). ➔ After four seconds the default screen is displayed. (Fig.6). 2.2 Turn OFF Figure 6 - SC1000 Standard Screen Switch off the ignition.
BUS BODY ELECTRONICS 2.3.2 Adjust blower speed Note The blower can be set from 20 to 100 in steps of 10. 20 is the smallest blower speed, on level 100 the blower runs at full speed. If the knob is turned counterclockwise to its most left position, on the screen displays “OFF”...
BUS BODY ELECTRONICS 2.3.3.2 Defrost function Rotate knob clockwise into 5 o’clock position ➔ air flow is directed against the wind screen. The water valve opens to generate heated air and the blower runs with maximum speed. 2.3.4 Toggle between fresh air and air recirculation Note The air recirculation mode is not limited in time.
BUS BODY ELECTRONICS 2.4.1.2 Terminate Press button shortly. Mode deactivated. the LED next to the button goes out, “AUTO” disappears from the display. Figure 11 - SC1000 AUTO mode active, heating Note When the AUTO mode is deactivated the compressor and the heating are off.
BUS BODY ELECTRONICS 2.4.2.2 Change blower speed level Press button. Blower speed level is increased. The current blower speed level can be read on the display Press button. Blower speed level is decreased . The current blower speed level can be read on the display. 2.4.2.3 Exit By pressing the button or automatically after 3 seconds of inactivity.
BUS BODY ELECTRONICS 2.4.4 Toggle between fresh air / air recirculation 2.4.4.1 Manual operation of the fresh air flaps Press button (Fig 5, No.5) when the automatic air recirculation is active. The LED next to the button lights up and the air recirculation icon (Fig.14) appears on the display.
BUS BODY ELECTRONICS 2.5 Preheating Note Programming, operating the heater and setting up the timer of the heater is the responsibility of the driver. He must ensure that at the start time the circumstances and the parking situation are suitable. For security reasons it is only possible to program the timer for the same and the next working day.
BUS BODY ELECTRONICS Minute digits flash. Now proceed exactly as described for setting the number of hours to set the number of minutes. Now the week days are displayed (Fig. 20). Set the week day (Mo, Tu, We, Th, Sa, Su) using the Figure 20 - SC1000 Week Day buttons.
BUS BODY ELECTRONICS If the start time was already programmed before, it appears instead of ”00:00“. The hour digits flash. Press button to increase number of hours. Press button to decrease number of hours. Press button to confirm value. Minute digits flash. Now proceed exactly as described for setting the number of hours to set the number of minutes.
BUS BODY ELECTRONICS 2.6 Reheat Note The reheat mode can only be activated in the AUTO mode (when the engine is running) and at at least 8°C outside temperature. In addition, the difference between setpoint of room tempera-ture and the setpoint of duct temperature must be <2K, and the difference between outside temperature and the setpoint of duct temperature must be <5.
BUS BODY ELECTRONICS 2.7 Errors Note If an error occurred, the error icon (Fig.4, F) appears on the display. 2.7.1 Error read out 2.7.1.1 Activate Press button (Fig.3, No.1) at driver’s workplace for 2 sec- onds . The menu for system fault analysis opens. The error message (e.g.
BUS BODY ELECTRONICS 2.7.1.5 Terminate Press button (Fig.3, No.1) at the driver’s workplace until the standard screen appears. 2.7.2 Error message overview Error message dis- Description Cause/remedy played Unused Hot water valve fail- 1. Check plug connections ure in the frontbox - Electrical and visual check of all plug connections The air distribution...
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BUS BODY ELECTRONICS Error message dis- Description Cause/remedy played has failed (substation 2, rear) Outside temperature 1. Check by means of the block diagram in the chapter “Check system components”, where the sensor - fault Passenger compart- respective component is connected, and replace the affected control device.
BUS BODY ELECTRONICS Error message dis- Description Cause/remedy played - Check refrigerant charge (too much / too little). If there is too little a leak test must be performed - Examine the roof-top airconditioning unit for soil- ing and check the function of the fans - Replace substation Ice formation at the Temporary shutdown of the airconditioning unit.