Bosch ACS 251, Original Instructions Manual, Page: 8 / 24

F 002 DG9 425 2014-03-20
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Bosch Limited
8 | ACS 251 | Product description en
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Fig. 2: Rear view
1 HMI support
2 Top panel
3 Power cable
4 Cable holder
5 Rear panel
6 Brakes
7 Right-hand side panel
8 Hose holder
9 USB port
3.3.1 Human Machine Interface (HMI)
The HMI consists of:
R
Pressure gauges - The pressure during the service is
displayed on the gauges.
R
Status and warning lights - The status of service
and disruptions during service are indicated by the
status and warning light.
Color indicated by the
status and warning light
Status of service
Red Error/Warning
Blinking green Service in progress
Static green Service complete
R
LCD - The menu options and status of service are
displayed on the LCD.
R
Keypad - The selection of service menu options and
service parameters can be done via the keypad. The
alphanumeric input keys can be used to enter letters
and special characters in input fields. In an input
field, pressing a key several times in succession
displays all the characters it can be used for (upper
case letters, special characters).
i
The alphabetical entries can be made in upper case
only.
Keys Description
AUTO Navigate to automode service menu
MANUAL Navigate to manual mode service menu
MENU Navigate to different menus:
R Additional services
R ACS maintenance
R ACS settings
ABORT Abort the service in progress
o or u Navigate up or down
E
Enter
Return to previous menu / rerun

Select / Deselect
z
Clear
Switch between numeric and alphabetical entry
i
Display system information
R
USB port - Firmware updates can be performed by
plugging the USB disk into the USB port.
3.3.2 Scale for refrigerant tank
The quantity of refrigerant charged into the vehicle A/C
system is controlled by a scale mounted beneath the
refrigerant tank.