Internal Refrigerent Identifier Maintenance (Acs 863 Only); Vacuum Pump Maintenance - Bosch ACS 753 Repair Instructions

Introduction
Internal Refrigerent Identifier
Maintenance (ACS 863 only)
A refrigerant identifier samples refrigerant
going into the ISV to verify it is R1234yf and
not contaminated. Replace the sample hose
assembly during every filter change and also if
prompted by an error message saying the hose
is clogged. See Figure 1-6.
1. Switch off the machine.
2. Open the service rear door.
3. Remove the rear cover (above the service
door) by pushing it up and extract it by pull-
ing it out.
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Figure 1-6. Internal refrigerent identifier location
4. Disconnect the existing sample hose as-
sembly (2) between the rear side of the
manifold and the refrigerant identifier, and
install a new sample hose assembly. If the
filter is any color but white, the filter must
be replaced.
5. Pull the filter barbs from the rubber hoses.
Snap the filter (1) out of the clip.
6. Install a new filter with the arrow pointing
downward as shown on the refrigerant iden-
tifier. Do not kink the rubber hoses. Push
the rubber hoses back into the refrigerant
identifier housing until they are straight.
7. Insert the rear cover so that the 4 holes on
the sides the cover fit into the 4 clips on the
machine. Push down to hook the rear cover.
8. Close the service rear door.
SP00D00609 2018-03-26
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ACS 753, ACS 763, ACS 863 Service Manual

Vacuum Pump Maintenance

NOTE: Vacuum pump oil must be changed with
every filter change, every 100 hours pump runs
or more often as necessary.
1. Call up the Main Menu.
2. Select NEXT icon.
3. Select MENU icon.
4. Select Pump Maintenance from the
Maintenance Menu or when prompted. The
display shows how long the vacuum pump
has operated since the last oil change.
REMAINING OIL LIFE XXX:XX (hhh:mm)
CHANGE OIL NOW?
5. Select OK icon to change vacuum pump oil.
6. If the the machine displays:
WARMING OIL FOR DRAIN
• allow the vacuum pump to run for two
minutes to warm up the oil.
7. If the oil is already warm, the display shows:
DRAIN USED OIL FROM PUMP AND REPLACE
WITH 550 ML OF NEW OIL REMOVE CAP TO
SPEED DRAINING OF OIL
8. Switch off the machine.
9. Open the service rear door.
10. Slowly open the oil fill port cover (2) to verify
there is no pressure in the machine. Then
carefully remove the cover. See Figure 1-7.
11. Remove the oil drain fitting cap (3) and drain
the oil into a suitable container for disposal.
Install the cap and close tightly.
12. Slowly add vacuum pump oil to the pump
through the oil fill port until the oil reaches
the center of the sight glass (1).
13. Install the cap on the oil fill port and close
tightly.
14. Close the service rear door.
15. Switch on the machine.
16. Select OK icon to continue.
17. The display show a message that indicate
to the user to check that the oil level is at
the center of the sight glass pump.
NOTE: In case it is necessary to add more oil,
repeat steps 8, 9, 10, 12, 13, 14 and 15 for
add oil.
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Robert Bosch GmbH