Rev. 07.06.2019
Id.No. DOK31016
BUS BODY ELECTRONICS
SC1000 OTOKAR
Operating Instructions
– Bus Driver
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Contents
List of figures 2
List of Tables 2
1. Introduction 3
1.1 Intended Use 3
1.2 Symbols used 5
1.3 Description of the control panel 6
1.4 Display description 7
2. Usage 8
2.1 Turn ON 8
2.2 Turn OFF 8
2.3 Driver’s workplace functions 8
2.3.1 Adjust Temperature 8
2.3.2 Adjust blower speed 9
2.3.3 Adjust air flow direction /defrost function 9
2.3.4 Toggle between fresh air and air recirculation 10
2.4 Passenger compartment functions 10
2.4.1 AUTO mode 10
2.4.2 Adjust blower speed level 11
2.4.3 Set temperature 12
2.4.4 Toggle between fresh air / air recirculation 13
2.5 Preheating 14
2.5.1 Set date and time 14
2.5.2 Activate heating (without start time delay) 15
2.5.3 Programming the timer 15
2.6 Reheat 17
2.6.1 Activate 17
2.6.2 Terminate 17
2.7 Errors 18
2.7.1 Error read out 18
2.7.2 Error message overview 19
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List of figures
Figure 1 - SC1000 Control Panel ............................................................................... 3
Figure 3 - SC1000 Substation ................................................................................... 4
Figure 3 - SC1000 Control Panel ............................................................................... 6
Figure 4 - SC1000 Display Screen.............................................................................. 7
Figure 5 - SC1000 Release ...................................................................................... 8
Figure 6 - SC1000 Standard Screen ........................................................................... 8
Figure 7 - SC1000 Current Blower Speed Level ............................................................. 9
Figure 8 - SC1000 Air Recirculation Mode Driver’s Seat Active ......................................... 10
Figure 9 - SC1000 AUTO Mode Active ...................................................................... 10
Figure 10 - SC1000 AUTO mode active, cooling ........................................................... 10
Figure 11 - SC1000 AUTO mode active, heating........................................................... 11
Figure 12 - SC1000 AUTO Mode OFF ....................................................................... 11
Figure 13 - SC1000 Manual Blower Speed Level .......................................................... 11
Figure 14 - SC1000 Current Room Temperature .......................................................... 12
Figure 15 - SC1000 Current Exterior Temperature ........................................................ 12
Figure 14 - SC1000 Air Recirculation Mode Active ........................................................ 13
Figure 17 - SC1000 Preheat ................................................................................... 14
Figure 18 - SC1000 ti-A ........................................................................................ 14
Figure 19 - SC1000 Number of Hours ....................................................................... 14
Figure 20 - SC1000 Week Day ................................................................................ 15
Figure 21 - SC1000 Heating Icon ............................................................................. 15
Figure 22 - SC1000 PrE ........................................................................................ 15
Figure 23 - SC1000 Memory Location ....................................................................... 15
Figure 24 - SC1000 Hour Display ............................................................................. 15
Figure 25 - SC1000 Display Week Day ...................................................................... 16
Figure 26 - SC1000 Operation Time.......................................................................... 16
Figure 27 - SC1000 Entfeuchten aktiv ....................................................................... 17
Figure 28 - SC1000 Error Read Out .......................................................................... 18
Figure 29 - SC1000 Current Error ............................................................................ 18
List of Tables
Table 1 - SC1000 Error Messages ........................................................................... 21
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1. Introduction
1.1 Intended Use
The SC1000 is a device designed to control HVAC components (heating, ventilation, air-conditioning) 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.
The communication between control panel and the respective substation is done via CAN bus.
Figure 1 - SC1000 Control Panel
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A substation is a control device with power outputs for the control of all the components integrated in the AC unit.
Figure 2 - SC1000 Substation
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1.2 Symbols used
Note
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1.3 Description of the control panel
Figure 3 - SC1000 Control Panel
Driver’s seat
Passenger Compartment
1. Fresh air / air recirculation button
5. Fresh air / air recirculation
button (optional)
9. Reheat (dehumidify)
button (optional)
2. Air direction control
6. Blower speed button
(optional)
10. AUTO mode button
3. Blower speed control
7. Heater button
11. Temperature button
4. Temperature control
8. Timer button heater
12. UP/DOWN button
13. Display
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1.4 Display description
Figure 4 - SC1000 Display Screen
A. Indicated value
J. Heater is on
B. Appears if the lowest adjustable room
temperature is reached
K. Fresh air flaps open
C. Is indicated with the setpoint tempera-
ture (passenger compartment)
L. Air recirculation is on (HVAC version
only)
D. Time
M. Is indicated with the current room tem-
perature
E. Blower speed level
N. Is indicated with the current outside
temperature
F. Error icon
O. Is displayed during blower speed ad-
justment at the driver’s seat
G. Reheat (dehumidification) active
(HVAC version only)
P. AUTO mode active
H. Blower is on (HVAC Version only)
Q. Is displayed during start time adjust-
ment of the preheater
I. Cooling is activated
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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-
pear on the display (Fig.5).
➔ After four seconds the default screen is displayed. (Fig.6).
2.2 Turn OFF
Switch off the ignition.
The system powers down.
2.3 Driver’s workplace functions
2.3.1 Adjust Temperature
2.3.1.1 Cooling (if the roof-top air-conditioning unit is in cooling mode only)
Rotate the knob (Fig.3, No.4) counterclockwise into the blue area.
2.3.1.2 Heating
Rotate the knob clockwise into the red area.
Note
The temperature for the driver’s seat cannot be ad-
justed.
Figure 5 - SC1000 Release
Figure 6 - SC1000 Standard Screen
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2.3.2 Adjust blower speed
2.3.2.1 Increase blower speed
Turn the knob (Fig.3, No.3) clockwise to 5 o’clock position.
Blower speed increases incrementally by 10.
The current blower speed level is shown in the display (Fig.
7).
2.3.2.2 Reduce blower speed
Turn the knob counterclockwise to 7 o’clock position to decrease blower speed level.
Blower speed decreases incrementally by 10
The current blower speed level is shown in the display (Fig.
7).
2.3.3 Adjust air flow direction /defrost function
2.3.3.1 Adjust air flow direction
Rotate knob (Fig.3, No.2) counterclockwise into 7 o’clock position
➔ air flow onto the floor
Rotate knob clockwise into 12 o’clock position
➔ air flow against the wind screen and the floor
Rotate knob clockwise into 2 o’clock position
➔ air flow against the wind screen
Rotate knob clockwise into 4 o’clock position
➔ air flow against the wind screen.
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” and the blower is switched
off.
If the defrost function is active the blower runs on
Figure 7 - SC1000 Current Blower Speed
Level
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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
Press button (Fig.3, No.1), to toggle between fresh
air and air recirculation modes.
➔ Fresh air: the LED next to the fresh air / air recirculation
button is not lit.
➔ Air recirculation: the LED next to the fresh air / air
recirculation button lights up.
2.4 Passenger compartment functions
2.4.1 AUTO mode
2.4.1.1 Activate
Press button (Fig.3, No.10) shortly.
Mode is activated.
the LED next to the button lights up, “AUTO” appears on the
display.
Note
The air recirculation mode is not limited in time.
Note
The AUTO mode can be activated only when the en-
gine is running.
While AUTO mode is active, the system turns the
cooling or heating on and off automatically (Fig. 10
and 11)
The blower speed is automatic unless it has been
manually set.
Figure 8 - SC1000 Air Recirculation Mode
Driver’s Seat Active
Figure 9 - SC1000 AUTO Mode Active
Figure 10 - SC1000 AUTO mode active,
cooling
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2.4.1.2 Terminate
Press button shortly.
Mode deactivated.
the LED next to the button goes out, “AUTO” disappears from
the display.
2.4.2 Adjust blower speed level
2.4.2.1 Activate
press button (Fig. 3, No.6).
Manual blower speed level adjustment active.
➔ The LED next to the button lights up and the current blower
speed level can be read on the display (Fig.13).
Blower speed can be changed.
Note
When the AUTO mode is deactivated the compressor
and the heating are off.
The blower speed is automatic unless it has been
manually set.
Note
The blower can be set from 10 to 100 in steps of 10.
10 is the smallest blower speed, on level 100 the
blower runs at full speed.
For operation the following conditions apply:
- If the engine is not running, the speed of the
blowers will reset to a certain value.
-
If the doors are opened the speed of the blowers
is reset to the above mentioned value.
- In cooling mode it is not possible to turn off the
blower completely
Figure 11 - SC1000 AUTO mode active,
heating
Figure 12 - SC1000 AUTO Mode OFF
Figure 13 - SC1000 Manual Blower
Speed Level
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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.
2.4.3 Set temperature
2.4.3.1 Adjust temperature
Press button.
Temperature +1˚C.
Press button.
Temperature -1˚C.
2.4.3.2 Display the current room or outside temperature
Press button.
“INT” and the current room temperature are shown on the dis-
play (Fig.12).
Press button again.
“EXT” and the current outside temperature are shown on the
display.
2.4.3.3 Terminate
Terminate the display by pressing the button or by
timeout automatically after 3 seconds.
Standard display screen appears.
Note
The temperature can be varied between the values
15°C and 28°C.
Figure 14 - SC1000 Current Room
Temperature
Figure 15 - SC1000 Current Exterior
Temperature
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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.
Press the button when the manual operation of the fresh
air flaps is active.
The fresh air flaps are operated automatically again.
The LED next to the button lights up and the air recirculation
icon disappears from the display.
Note
The air recirculation mode is limited to 10 minutes. After
this time the fresh air ducts are automatically regulated.
Figure 16 - SC1000 Air Recirculation
Mode Active
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2.5 Preheating
2.5.1 Set date and time
Press button (Fig.3, No.8) for 3 second.
“Pre“ appears on the display (Fig. 17).
Press button or (Fig.3, No.12) once.
”ti-A“ appears on the screen (Fig. 18)
Press button to confirm.
”hour“ appears on the screen (Fig. 19) and the hour digits
flash.
Press button to increase the number of hours (0-23 h).
Press button to decrease the number of hours (0-23 h).
Press button to confirm value.
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. The Start
time delay for Monday is already possible on Friday.
To activate the preheating function the engine must be
off.
The pre-heating function will only be executed if no low
voltage (<22V) is present. Otherwise, the function is automatically terminated after 10 seconds.
Note
Day and time are set in the following order:
hours – minutes – day of the week.
The position to be set is flashing.
Figure 17 - SC1000 Preheat
Figure 19 - SC1000 Number of Hours
Figure 18 - SC1000 ti-A
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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
buttons.
Press button to confirm the day.
The default screen appears.
2.5.2 Activate heating (without start time delay)
Press button (Fig 3. No 7.).
The button’s LED lights up and the heating icon appears on
the screen (Fig.21).
2.5.3 Programming the timer
Press button 3 seconds.
“PrE“ appears on the screen (Fig.22).
2.5.3.1 Choose start time
Press button to display the memory locations.
“PrE1“ appears on the display (Fig.23).
Press buttons to scroll through memory locations
PrE1-7 and select one of them.
Press button to confirm selection.
“00:00“ and “hour“ appear on the screen (Fig. 24).
Note
Prior to using the timer, the correct time must be set.
The timer allows you to heat up the passenger compartment without having to start the engine.
By using the timer, the starting and operating time can
be selected individually.
Up to 7 start times can be set in parallel (PRE1-7).
Figure 20 - SC1000 Week Day
Figure 21 - SC1000 Heating Icon
Figure 22 - SC1000 PrE
Figure 23 - SC1000 Memory Location
Figure 24 - SC1000 Hour Display
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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.
Now the weekdays are displayed (Fig. 25).
Set the week day (Mo, Tu, We, Th, Sa, Su) using the
buttons.
Press button to confirm the day.
“0´”appears on the screen (Fig.26).
2.5.3.2 Set operation time
Press buttons to set operating time.
Press button to confirm operating time.
2.5.3.3 Activate pre-heating mode
Press button to activate the pre-heating mode with the chosen start and operation time.
2.5.3.4 Terminate
Press button to exit the menu.
Note
The operation time can be set in steps of 5 between
5 and 60 minutes.
Note
If more than one preheating time is programmed, preheating is done at all programmed starting times.
Figure 25 - SC1000 Display Week Day
Figure 26 - SC1000 Operation Time
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2.6 Reheat
2.6.1 Activate
Press button (Fig. 3, No.9).
The button’s LED lights up and the reheating icon appears
on the screen (Fig.25).
2.6.2 Terminate
Press button.
The button’s LED turns off and the heating icon disappears
on the screen.
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.
Figure 27 - SC1000 Entfeuchten aktiv
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2.7 Errors
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. E2:00) appears on the display
The count (e.g. H000) shows the current frequency of occur-
rence of the error.
2.7.1.2 Error messages
Press buttons to scroll through error messages.
2.7.1.3 Terminate
Press button (Fig.3, No.1) at the drivers’s seat until the standard screen appears.
2.7.1.4 Erase error
Press the button 6 seconds
.
The error stops being displayed.
If the error has not been corrected, it appears again with a dot
between the third and fourth digit of the error code within
the error messages (Fig.28).
Note
If an error occurred, the error icon (Fig.4, F) appears on
the display.
Note
If it is a currently existing error, this is indicated by a dot
between the third and fourth digit of the error code on the
display (Fig.29). If the error is corrected, the point disappears and the count increases.
Figure 28 - SC1000 Error Read Out
Figure 29 - SC1000 Current Error
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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 displayed
Description
Cause/remedy
00
Unused
-
01
Hot water valve failure in the frontbox
1. Check plug connections
- Electrical and visual check of all
plug connections
2. Replace component
3. Replace control unit
02
The air distribution
flap actuator (foot
area) of the frontbox
has failed
10
Note: Further errors
can arise in conjunction with this error
message. They are to
be ignored until error
10 is corrected.
Communication to
the substation is interrupted (substation 1).
1. Verify the substation is active
- Check plug connections
- Replace substations
- Replace control unit
12
Hot water valve has
failed (roof) (sub-
station 1)
1. Check plug connections
- Electrical and visual check of all plug connections
2. Replace components
3. Replace control unit
20
Note: further errors
can arise in conjunction with this error
message. They are to
be ignored until error
20 is corrected.
Communication to
the substation is interrupted.
1. Verify the substation is active
- Check plug connections
- Replace substation
- Replace control unit
21
Motor 0 of the convector water valve
has failed (substation
2 front)
1. Check plug connections
- Electrical and visual check of all plug connections
2. Replace components
3. Replace control unit
22
Motor 1 of the convector water valve
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Error message displayed
Description
Cause/remedy
has failed (substation
2, rear)
A0
Outside temperature
sensor - fault
1. Check by means of the block diagram in the
chapter “Check system components”, where the
respective component is connected, and replace
the affected control device.
2. Visual check of all plug connections
- Replace sensor
A1
Passenger compartment sensor - fault
(front)
A2
Passenger compartment sensor - fault
(rear)
A3
Roof duct temperature sensor - fault
A4
Ice sensor - fault
A5
Convector temperature sensor – fault
(rear)
A6
Convector temperature sensor – fault
(front)
B0
High-/Low pressure
➔ The clutch will be
activated after three
minutes if the pressure falls.
1. Check whether B1 occurred, if this is the case
see B1.
2. Short-term overload of the airconditioning system due to high engine speed at high ambient
temperature.
➔ The air-conditioning system turns off for three
minutes.
B1
High-/Low pressure
(The error message
B0 occurred more
than three times since
the last start of the
control unit)
The air-conditioning system is switched off completely. Turn the ignition off and then on again to
initiate a reboot of the system. It is not enough to
turn off the engine and then on again, because a
reboot of the control unit is required. Can an overload caused by high engine speed at high ambient
temperature be excluded, the following must be
checked:
- Check the wiring of the compressor pressure
switches
- Replace the pressure switch
- Check the wiring of the solenoid valve
- Replace the solenoid valve
- Check the wiring of the condenser fan
- Replace the condenser fan
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Error message displayed
Description
Cause/remedy
- 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 soiling and check the function of the fans
- Replace substation
B2
Ice formation at the
evaporator
Temporary shutdown of the airconditioning unit. If
this message appears frequently, these steps
must be followed:
- Examine air duct for soiling
- Check evaporator fan wiring
Table 1 - SC1000 Error Messages
Valeo Thermal Commercial Vehicles Germany GmbH
Friedrichshafener Str. 7 – 82205 Gilching - Germany - Tel. +49 (0)8105 7721-0 - Fax 49 (0)8105 7721-889
www.valeo-thermalbus.com - service-valeobus@valeo.com
© Valeo
Thermal Commercial Vehicles Germany GmbH 2019
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