47 6.3 Evacuation Of The A/C System Of The Vehicle - Bosch ACS 753 Manual Original

en 58 | ACS 753 | Instructions for use
6.3 Evacuation of the A/C system of the
vehicle
WARNING: to prevent injuries while
working with the refrigerant, read and
follow the instructions and warnings in this
manual, and wear protective clothing, such
as safety glasses and gloves.
1. Call up the Main Menu.
2. Select
.
3. Enter the service data and confirm with
(see chapter 6.1).
4. Accept the default 5 minute vacuum time or enter
the desired vacuum time using the number buttons.
5. Select
to continue.
i
the software offers the possibility of performing a
leak check after the vacuum. Set whether to perform
or not perform the leak check function.
!
The process stops if the pressure rises above 0.35
bar (5 psi). Recover refrigerant before proceeding.
6. Connect both service hoses to the vehicle service
connections and open the valves of the service
hoses turning the ring nuts clockwise.
7. Select
to continue.
8. The station generates a vacuum in the A/C system
for the programmed time interval.
9. The station at the end of the vacuum test performs a
leak check if previously set.
10. The station stops at the end of the specified time
interval displaying the test result.
i
Select to print the vacuum information.
Select to return to the Main Menu.
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SP00D00596 2019-07-04
6.4 Hoses flushing
WARNING: to prevent injuries while
working with the refrigerant, read and
follow the instructions and warnings in this
manual, and wear protective clothing, such
as safety glasses and gloves.
!
If the next vehicle on which to perform the work
contains a type of oil different from the oil of the
previous vehicle, it is advisable to flush the service
hoses to remove traces of residual oil in order to
prevent contamination.
1. Call up the Main Menu.
2. Select
.
3. Select
.
4. Select Functions.
5. Select Flush Hoses.
« The display shows
Connect the hoses to
valves.
6. Connect the service hoses to the flushing
connections as shown.
Fig. 17: Hoses flushing
1 Flushing connections
7. Open the valves of the service hose connections
turning the ring nuts clockwise.
8. Select
to start the hose cleaning procedure,
which lasts three minutes, followed by a recovery.
« Once the flushing is complete, a message ap-
pears on the display indicating that the hoses
flushing is completed.
9. Select
to exit and return to the Functions Menu.
10. Close the valves of the connections turning the ring
nuts counter-clockwise.
1
Robert Bosch GmbH