
F 002 DG9 425
2014-03-20
|
Bosch Limited
Program description | ACS 251 | 17
en
9.
Turn the HP/LP quick couplers in the counterclock-
wise direction and disconnect from the service con-
nections on the vehicle A/C system.
10.
Press
.
11.
Press
to start draining the refrigerant from the
hoses.
Once the refrigerant is drained, a summary
screen is displayed.
"
The servicing of the vehicle A/C system is complete.
6.8
Additional services
6.8.1
Refrigerant top up
If there is a decrease in the quantity of refrigerant in
the vehicle A/C system, an additional quantity can be
added.
Before doing a top up, the quantity of refrigerant al-
ready present in the car A/C system is not known. In
such a scenario, topping up might result in overcharging
of the refrigerant. A top up should be performed only
after ascertaining the quantity of refrigerant already
present in the car A/C system. Else, a complete A/C
service should be performed.
1.
In the main menu, select "
A/C Services
" and press
E
. Alternatively, press the
MENU
button on the
keypad.
2.
Select "
Add. Services
" and press
E
.
3.
Select "
R134a Top Up
" and press
E
.
4.
Connect the LP coupler to the service connection on
the vehicle A/C system and press
.
5.
Start the vehicle and switch on the A/C. Press
.
6.
Enter the quantity of refrigerant to be topped up.
Press
.
i
The valid top up quantity range is between 20 and
100 grams.
7.
Press
.
The refrigerant top up starts. At the end of the
service,
Hose Drain
menu is displayed.
8.
Turn the HP/LP quick couplers in the counterclock-
wise direction and disconnect from the service con-
nections on the vehicle A/C system.
9.
Press
.
10.
Press
to start draining the refrigerant from the
hoses.
Once the refrigerant is drained, a summary
screen is displayed.
"
You have successfully topped up the refrigerant in the
vehicle.
6.8.2
Hose drain
After every recharge / top up, some quantity of refriger-
ant is left in the hoses. It is necessary to drain the re-
frigerant from the hoses.
1.
In the main menu, select "
A/C Services
" and press
E
. Alternatively, press the
MENU
button on the
keypad.
2.
Select "
Add. Services
" and press
E
.
3.
Select "
Hose Drain
" and press
E
.
The
Hose Drain
menu is displayed.
4.
Turn the HP/LP quick couplers in the counterclock-
wise direction and disconnect from the service con-
nections on the vehicle A/C system.
5.
Press
.
6.
Press
to start draining the refrigerant from the
hoses.
Once the refrigerant is drained, a summary screen
is displayed.
"
The servicing of the vehicle A/C system is complete.
6.8.3
A/C performance test
The health of the vehicle A/C system can be monitored
by checking the pressure and temperature at a specific
location as recommended by the vehicle manufacturer.
The A/C performance can be done before or after ve-
hicle A/C service.
1.
In the main menu, select "
A/C Services
" and press
E
. Alternatively, press the
MENU
button on the
keypad.
2.
Select "
Add. Services
>> "
A/C Test
".
3.
Press
E
.
4.
Connect the HP and LP service hoses to the respec-
tive service connections on the vehicle A/C system.
Press
.
5.
Start the engine with the vehicle gear lever turned to
Neutral
.
6.
Switch on the vehicle A/C to
Maximum
(cooling to
maximum). Press
.
7.
Press
.
8.
Perform the A/C system test based on either of the
following as per the vehicle manufacturer’s recom-
mendation:
$
Grill temperature
$
HP and LP pressure gauge readings
9.
After the A/C system test is complete, turn off the
engine and the vehicle A/C system. Press
.
10.
Disconnect the HP hose from the HP service con-
nection of the vehicle A/C system. Press
.
11.
Follow the instructions displayed.
12.
Press
E
.
The
A/C TEST HOSE DRAIN
menu is displayed.
13.
Detach the LP coupling and press
.
14.
Press
to start the hose drain.
"
Upon completion of the hose drain, the A/C perfor-
mance test is complete.
Summary of Contents for ACS 251
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