Recover Function - Bosch ACS 753 Repair Instructions

ACS 753, ACS 763, ACS 863 Service Manual
N O T E : R e f e r t o S c a l e C a l i b r a t i o n a t
Replacement Scale Assembly/Magnet in the
Electrical section, if necessary.
The Recover and Charge function tests must be
performed sequentially, in the order presented
here.

Recover Function

During the Recover process, the system will
initiate a filter check, service data entry, and
inlet pressure check.
1. Empty the oil drain bottle before starting a
recovery.
2. Connect the high-side (red) and/or low-side
(blue) hoses to the test tank.
3. Open the coupler valves on the hoses by
turning the collars clockwise.
4. Select the RECOVER icon from the main
menu.
5. The screen will message display: "Connect
both service hoses to AC system being
serviced and open both coupler valves".
6. Select OK icon and unit perform:
• inlet pressure check.
• A/C unit internal clearing process.
• 1st recovery stage.
• 2 st recovery stage (deep recover).
7. Select OK icon to continue or ESC icon to
cancel.
8. The machine (ACS 863 only) checks the
refrigerant in the source tank to verify it
is R1234yf and not contaminated. The
machine displays the following screens:
INITIALIZING REFRIGERANT IDENTIFIER
ANALYZING REFRIGERANT SAMPLE
REFRIGERANT PURITY PASSED
9. The unit will run low-side clearing then enter
into a 1 stage Recovery.
st
10. When the system has recovered to
-0.4 bar, the vacuum pump starts and runs
until recover is complete.
Robert Bosch GmbH
Diagnostics and Testing
11. 2 stage recovery. Unit perform special
th
deep recovery function where pump and
compressor are working togheter to intake all
refrigerant small parts still in the A/C vehicle
system. Deep recover min tiem is 5 minutes.
Then Oil drain process to evacuate the
accumulator from used oil recoverd by vehicle.
12. After the oil drain is complete, a summary
of the amount of refrigerant recovered and
oil drained is displayed. The unit displays:
Or:
13. Select Print icon to print out recovery
information and pre-recover diagnostics or
select OK icon to return the main menu.
The displayed recovered weight can vary
depending on ambient conditions and
should not be used as an indicator of
scale accuracy. The amount of oil that was
removed from the A/C system is the amount
of new oil that can be charged into the A/C
system after evacuation is complete.
• Use only new oil to replace the oil removed
during the recycling process.
• Dispose of used oil according to government
laws and regulations.
Recovery is complete.
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SP00D00609 2018-03-26