Valeo SC400 User manual

Rev. 23.11.2018
Id.No. DOK30404
BUS BODY ELECTRONICS
SC400-410 TÜRKEI
OperatingInstructions
-Busdriver

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Contents
Contents 1
List of Figures 2
List of Tables 2
1Introduction 3
1.1 Intended purpose 3
1.2 Symbols used 3
1.3 Description of the control panel 4
1.3.1 SC400 4
1.3.2 SC410 5
2Use 6
2.1 Activate/deactivate Standby 6
2.1.1 Standby 6
2.1.2 Activation 6
2.1.3 Deactivation 6
2.2 Auto mode 7
2.2.1 Activation 7
2.3 Turning air-conditioning compressor on/off 8
2.3.1 Deactivation 8
2.3.2 Activation 9
2.4 Heating Mode 9
2.5 Setting desired room temperature 10
2.6 Setting blower level 11
2.7 Switch air-conditioning/recirculating air 12
2.8 Additional component 13
2.9 Errors 14
2.9.1 Error display 14
2.9.2 Error code overview 14

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List of Figures
Figure 1 - SC400 control panel..................................................................................4
Figure 2 - SC410 control panel..................................................................................5
Figure 3 - SC410 Standby........................................................................................6
Figure 4 - SC410 example start display after activation.....................................................6
Figure 5 - SC410 control panel before and after activating Auto mode...................................7
Figure 6 - SC410 air-conditioning compressor deactivated.................................................8
Figure 7 - SC410 air-conditioning compressor/Auto mode activated .....................................9
Figure 8 –SC410 changing the temperature ............................................................... 10
Figure 9 - SC410 changing the temperature ................................................................ 10
Figure 10 - SC410 blower level from lower to medium speed............................................ 11
Figure 11 - SC410 blower level at high speed.............................................................. 11
Figure 12 - SC410 blower level at low speed ............................................................... 11
Figure 13 - SC410 recirculating air function active......................................................... 12
Figure 14 - SC410 fresh air valves open..................................................................... 12
Figure 15 –SC410 additional component switched on.................................................... 13
Figure 16 - SC410 error display............................................................................... 14
List of Tables
Table 1 - SC400/410 temperature difference and blower level in cooling mode ........................7
Table 2 - SC410 temperature difference and blower level in heating mode .............................8
Table 3 - SC410 Temperature Difference Compressor .....................................................8
Table 4 - SC410 Temperatur Difference Water Valve + Electric Water Pump ..........................9
Table 5 - Error code overview ................................................................................. 15

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1 Introduction
1.1 Intended purpose
The SC400 and SC410 control elements including the SR400 and SR410 relays boards are
systems intended to control the HVAC components (heating, ventilation, air-conditioning) in
buses, for example for roof-top air-condition systems. They consist of a control element inte-
grated into the dashboard (control device as an interface between human and machine) and an
accessible relays board.
The systems are available in basic (SC400/SR400) and standard versions (SC410/SR410),
respectively. In the basic version, the control element allows the driver to control the roof-top
air-conditioning system that has air-conditioning functions. The standard version also has an
optional heating function and can be set between air-conditioning and recirculating air functions.
The controller for the air-conditioning components can operate automatically. To do so, the bus
driver simply has to set the desired room temperature.
These operating instructions apply to the following air conditioning system variants:
➔SC400: Air-conditioning system (AC)
➔SC410: Air-conditioning system with air-conditioning function (VAC), air-conditioning system
with heating function (HAC), air-conditioning system with heating and air-conditioning functions
(HVAC).
1.2 Symbols used
Note

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1.3 Description of the control panel
The control elements of the SC400 and SC410 have largely the same components. These are
named and their functions described in the following sections.
1.3.1 SC400
Designation
Function
1. Display
Display for current room temperature and for
error codes
2. Status light
Indicates whether a function is active (red sta-
tus light = function active)
3. On/off button
On/off button of the control panel
4. Auto button
Turns on automatic mode
5. AC button
Turns air-conditioning system on/off
6. Blower level button
Manually sets the blower level
7. Status display of blower level
Displays the current blower level
8. Desired room temperature buttons
Sets the desired room temperature
Figure 1 - SC400 control panel
2
4
5
3
1
6
8
7
6

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Figure 2 - SC410 control panel
1.3.2 SC410
Designation
Function
1. Display
Display for current room temperature and for
error codes
2. Status light
Indicates whether a function is active (red sta-
tus light = function active)
3. On/off button
On/off button of the control panel
4. Auto button
Turns on automatic mode
5. AC button
Turns air-conditioning system on/off
6. Blower level button
Manually sets the blower level
7. Status display of blower level
Displays the current blower level
8. Desired room temperature buttons
Sets the desired room temperature
9. Air-conditioning/recirculating air button
Sets between recirculating air and air-condi-
tioning
10. Function button
On/off for additional component
Note
The image for the SC410 is always used as a repre-
sentative for both versions in the following operating in-
structions.
2
4
5
3
1
6
8
7
9
10

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2 Use
2.1 Activate/deactivate Standby
2.1.1 Standby
If the motor (KL 61) is running, the system is in Standby mode.
The status light for the On/Off button lights up red (Figure 3).
2.1.2 Activation
Press button
➔The status light for the On/Off button goes out, the preset
temperature (22.0 °C when first initiating the power supply,
thereafter the last set value) displays, Auto mode is acti-
vated and the automatically set blower level displays. (Fi-
gure 4)
2.1.3 Deactivation
Press button
➔Compressor and blowers are deactivated immediately
(turning off the motor has the same effect)
If the motor is running, the device returns to Standby mode, the status light of the On/Off button
lights up red. (Figure 3)
Note
If the current room temperature is below the set desired
room temperature, the device automatically begins to
heat (SC410 only).
Figure 4 - SC410 example start display
after activation
Figure 3 - SC410 Standby

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2.2 Auto mode
2.2.1 Activation
Press button when status light is off. (Figure 5, above)
➔Mode is active and corresponding status light lights up
(Figure 5, below)
The temperature difference is the difference between the cur-
rent room temperature and the set desired room temperature.
Blower level
Temperature difference
Level 1: T_Room –T_Desired
≤1 K
Level 1 →2: T_Room –T_Desired
>1 K
Level 2 →3: T_Room –T_Desired
>3 K
Level 3 →2: T_Room –T_Desired
<2 K
Level 2 →1: T_Room –T_Desired
<0 K
Table 1 - SC400/410 temperature difference and blower level in cooling mode
Note
When starting the device, Auto mode is reactivated (cor-
responding status light turns on).
Note
When activating Auto mode, the system automatically
turns on the blower. Auto mode has no function in this
case, meaning when pressing the Auto mode during
Auto mode, nothing happens.
Figure 5 - SC410 control panel before
and after activating Auto mode

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Different blower level than level 1 is only possible when T_duct >33 °C
Gebläsestufe
Temperaturdifferenz
Level 1: T_Duct <35 K
Stufe 1 →2: T_Room –T_Desired
>-1K
Stufe 2 →3: T_Room –T_Desired
>-3K
Stufe 3 →2: T_Room –T_Desired
<-2K
Stufe 2 →1: T_Room –T_Desired
< 0K
Table 2 - SC410 temperature difference and blower level in heating mode
2.3 Turning air-conditioning compressor on/off
Compressor
Temperature Difference
On: T_Room –T_Desired
≥2 K
Off: T_Room –T_Desired
≤-1K
Table 3 - SC410 Temperature Difference Compressor
2.3.1 Deactivation
Press button when status light is on.
➔Air-conditioning compressor is deactivated. The cooling
function is turned off (Figure 6).
Note
After starting the ignition, the axial fans first run for 10
seconds before the air-conditioning compressor acti-
vates, if needed –the status light lights up after starting.
nothing.
Figure 6 - SC410 air-conditioning
compressor deactivated

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2.3.2 Activation
Press button when status light is off.
➔Air-conditioning compressor is activated and turns on if the
minimum run times are maintained (see following note).
The cooling function then turns on again.
2.4 Heating Mode
Water Valve / Electric Pump
Temperature Difference
Open / On: T_Room –T_Desired
≤-1K
Close / Off: T_Room –T_Desired
≥1 K
Table 4 - SC410 Temperatur Difference Water Valve + Electric Water Pump
Note
The air-conditioning compressor must be deactivated for
at least 2 minutes before it can be turned on again. If the
AC button is pressed during this time, the device reac-
tivates the air-conditioning compressor after 2 minutes.
(AC button blinks).
The air-conditioning compressor runs for at least 2
minutes before it turns off. If it is deactivated directly after
activation, it will continue to run for 2 minutes (AC button
blinks).
Note
An abrupt change in the set temperature results in a
change of heating ↔cooling. Result:
-> Climate compressor is not active for 3 minutes
- The water valve is not opened for 3 minutes
Figure 7 - SC410 air-conditioning
compressor/Auto mode activated