Bosch ACS 553 Service Manual page 21

ACS 553, ACS 563 Service Manual
10. The vacuum function is finished when the
display shows:
SERVICE VACUUM COMPLETE
11. Select OK icon to continue.
12. Select Convert unit refrigerant and select
OK icon to start the function.
13. Select OK icon to continue with the
conversion procedure.
14. The display prompts to replace all the
components.
15. Switch off the machine.
16. Remove the service hoses with quick
couplers.
Figure 1-11. Ports assembly
17. Remove the HP (red) and LP (blue) flush
ports.
18. Remove the cap (1).
19. Place the contamination port (2) with its
o'ring and tighten at 15 Nm torque.
20. Place the Schrader valve in it (3) and tighten
at 0.3 Nm ± 0.1 torque.
21. Place the LP (blue) flush port (6) with its
o'ring and tighten at 15 Nm torque.
22. Place the Schrader valve in it (7) and tighten
at 0.3 Nm ± 0.1 torque.
23. Place the HP (red) flush port (4) with its
o'ring and tighten at 15 Nm torque.
24. Place the Schrader valve in it (5) and tighten
at 0.3 Nm ± 0.1 torque.
25. Attach new high- (red) and low-side (blue)
service hoses with quick couplers. Tighten
at 7.9 Nm torque.
26. Connect the unit to a power source and
place the power switch on.
Robert Bosch GmbH
27. Follow the instructions on display to replace
filter (refer to "Filter Maintenance" in the
Maintenance section) and vacuum pump oil
(refer to the "Vacuum Pump Maintenance"
in the Maintenance section).
NOTE: If the A/C unit never recovered refrigerant
then it won't be asked to replace the filter nor
replenish the pump oil.
28. The conversion procedure is finished when
the display shows:
THIS AC UNIT IS NOW CONVERTED
TO R-XXXX (refrigerant)
29. Select OK icon to complete the process.
30. Remove the refrigerant identification decal
from the right side of the enclosure replacing
it with the new one.
31. Perform air flow calibration. Refer to
1
"Air Flow Calibration" in the Diagnostics and
2
Testing section.
3
32. Perform 3 kg tank refill and then a
4
5
"Periodic Leak Test" to verify system
6
7
tightness (refer to the "Pressure Decay Leak
Test" in the Maintenance section).
21
Introduction
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