1 689 988 238
2012-11-06
|
Robert Bosch GmbH
106 | ACS 651/751 | Program description
en
6.9
Flushing the vehicle A/C system
Flushing is carried out to purge used compressor oil,
impurities or metallic particles from the vehicle A/C sys-
tem. The refrigerant, R134a, itself is used as the
medium for flushing.
!
Do not use any solvent for flushing. Using solvents
might damage the ACS 651/751.
The refrigerant in the vehicle A/C system must be
extracted before flushing. During cleaning, the refriger-
ant is injected into the vehicle A/C system using the HP
hose and is simultaneously extracted using the LP hose.
At the end of flushing, the residual oil is added to the
used oil reservoir.
!
The system components which cannot be flushed
should be removed from the flushing circuit. An inter-
mediate filter must always be used when flushing.
!
Before carrying out the flushing procedure, recover
the refrigerant from the vehicle A/C system.
1.
Connect the quick couplers to the service connections
on the vehicle A/C system.
2.
Disconnect the following system components from the
refrigerant circuit of the vehicle A/C circuit:
$
Compressor
$
Line filter
$
Fixed choke
$
Collection containers
$
Filter drying units
$
Expansion valve
3.
Connect the quick couplers and the components
that need to be flushed using special adapters.
4.
In the main menu, select "
Vehicle A/C Service
" and
press
E
.
5.
Select the operator name and press
E
.
6.
Select "
A/C System Flushing
" and press
E
.
7.
Select the required mode of flushing and press
E
.
8.
Enter the vehicle ID and Press
E.
i
Performing extended flushing is equivalent to perform-
ing short flushing thrice.
9.
Press
E
.
The flushing process starts.
10.
To cancel the flushing, press
c
. After the flushing
is complete, disconnect the quick couplers and the
components from the special adapters.
11.
Connect the components listed in step 2 back to
the vehicle A/C system.
12.
In the manual mode, perform vacuum creation and
refill refrigerant into the vehicle A/C system.(See
chapter 6.7)
6.10 Refrigerant top-up
i
This option is available only for ACS 651.
The vehicle A/C system requires a specific quantity of
refrigerant to perform the cooling effectively.
If there is
a decrease in the quantity of refrigerant in the vehicle
A/C system due to a leak or because of other reasons,
an additional quantity needs to be added or "topped
up".
1.
In the main menu, select "
Vehicle A/C Service
" and
press
E
.
2.
Select the operator name and press
E
.
3.
Select "
Refrigerant Top Up
" and press
E
.
4.
Connect the appropriate coupler to the service con-
nection 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.
Select "
Start Top Up
" and press
. To abort the top-
up process, press
c
.
The refrigerant top-up starts. After the top-up is
complete, the summary screen is displayed.
8.
Press
to print the service report.
"
You have successfully topped up the refrigerant in the
vehicle.
