Bosch ACS 251, Original Instructions Manual, Page: 16 / 24

F 002 DG9 425 2014-03-20
|
Bosch Limited
16 | ACS 251 | Program description en
6.6 Manual mode
6.6.1 Overview of manual mode
In the manual mode, only the selected phase is ex-
ecuted. For example, upon selecting "
Recovery ", only
the recovery phase will be executed. It is also possible
more than one service phase.
The default values of the parameters in each stage are
listed in the following table:
Service phase Parameter Default value
Recovery Pressure increase time
1 min
Vacuum Vacuum time 20 min
Vacuum hold time 4 min
Oil recharge Refrigerant quantity 500 g
10 ml
Oil quantity
Tab. 1: Default values of parameters
6.6.2 Recovery
In the recovery phase, the following parameters can be
set:
R
Duration for the pressure increase test
R
Hose selection
$
HP hose
$
LP hose
$
HP and LP hoses
6.6.3 Vacuuming phase
In the recovery phase, the following parameters can be
set:
R
Vacuum creation time
R
Vacuum test time
R
Hose selection
$
HP hose
$
LP hose
$
HP and LP hoses
i
Ensure that you perform recovery before the vacu-
uming.
6.6.4 Oil recharge phase
In the oil recharge phase, the following parameters can
be set:
R
Oil quantity
R
Refrigerant quantity
R
Hose selection
$
HP hose
$
LP hose
$
HP and LP hoses
i
Oil injection can only be carried out on an A/C sys-
tem that is under vacuum.
i
Every time oil is recharged, R134a is also recharged.
i
The quantity of oil added to the vehicle A/C system
corresponds to the quantity drawn during the recov-
ery phase. When filling a vehicle A/C system for the
first time, refer to the vehicle documentation or the
vehicle-specific repair manual for the specified oil
recharge quantity.
i
Use oil grade specified by the vehicle manufacturer.
Use only new oil to replace the oil removed during
the recovery process. Used oil should be discarded
as per local regulations.
6.6.5 Recharge phase
In the recharge phase, the following parameters can be
set:
R
Refrigerant quantity
R
Hose selection
$
HP hose
$
LP hose
$
HP and LP hoses
6.7 Performing service in manual mode
!
Use only new oil to replace the amount removed dur-
ing the recovery process. Used oil should be discard-
ed as per applicable regulations.
1. In the main menu, select " A/C Services ". Alternative-
ly, press the MANUAL button on the keypad.
i
If you press the MANUAL button, skip to step 3.
2. Select " Manual Mode " and press E .
 The phases that can be executed in the manual
mode are displayed on the screen.
3. Press the o or u keys to scroll to a particular phase.
To select a particular phase or multiple phases for
execution, press

.
4. Press E .
 The service parameters for the selected phases
are displayed.
5. Set the values of the service parameters.
6. Check the type of connection on the vehicle
A/C system.
7. Connect the appropriate coupler/s to the service
connection on the vehicle A/C system.
!
Do not use any tools to tighten the couplers.
!
Always pay attention to the vehicle-specific info be-
fore changing the quantity of oil and R134a.
8. Press E .
 The selected service phase starts. At the end of
the service,
Hose Drain menu is displayed.