Bosch ACS 251, Original Instructions Manual, Page: 18 / 24

F 002 DG9 425 2014-03-20
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Bosch Limited
18 | ACS 251 | Maintenance en
7. Maintenance
!
Do not carry out any maintenance work that is not
specifically recommended in this section.
7.1 Spare and wearing parts
Description Order number
Filter dryer with set of inline filter
elements
F 002 DG1 4J9
Set of inline filter elements F 002 DG1 544
i
Contact your local Bosch dealer for ordering spare
and wearing parts.
7.2 Refilling the refrigerant tank
See chapter 4.5 for the procedure to fill the internal
refrigerant tank.
7.3 Service record
Use the " Service Record " option to view the following
information:
R
Report of the last vehicle A/C system service
R
Report of the last self test
R
Latest error that occurred during vehicle A/C service
To view the service record menu, execute the following
procedure:
¶
In the main menu, select " ACS Maintenance " >>
" Service Record ". Press E .
¶
Alternatively, press the MENU button. Select " ACS
Maintenance " >> " Service Record "
"
The Service Record menu is displayed.
7.3.1 Viewing the last vehicle A/C service reports
Use this option to view the last vehicle A/C service re-
port.
¶
Select " Service Report " and press E .
"
The report for the last vehicle A/C service is displayed.
7.3.2 Last self test
Use this option to view the last self test report.
1. To view the last self test report, select " Self Test
Report " and press E .
2. Press the o to u to view each of the parameters
checked during the self test.
7.3.3 Latest error during vehicle A/C service
Use this option to view the latest error that occurred
during vehicle A/C service.
¶
Select " Error Report " and press E .
i
See chapter 5 for the description of the error
messages.
7.4 Vacuum pump oil change
The vacuum pump oil needs to be changed after every
60 hours of operation. When it is time to change the
vacuum pump oil, the message
Replace Vacuum
Pump Oil
is displayed.
1. Perform hose drain (refer chapter 6.8.2).
2. Disconnect the HP and LP hoses from the respective
connectors.
3. Turn off the master switch.
4. Disconnect the power cable from the mains supply.
5. Disconnect the power cable from the power inlet.
6. Disconnect the fresh oil bottle and the used oil bottle.
7. Open the front panel.
Warning - Risk of burns!
The hot surface of the vacuum pump can
cause severe burns to the hands.
¶
Allow the vacuum pump to cool before
commencing maintenance work
i
Use a container to drain the vacuum pump oil.
8. Open the drain plug (Fig. 6, Pos. 3) and drain out
the vacuum pump oil.
9. Open the screw cap of the vacuum pump
(Fig. 6, Pos. 1).
!
Ensure that the oil does not spill over when you fill
fresh oil.
10. Fill fresh vacuum pump oil. Observe the level
indicator (Fig. 6, Pos. 4) to check if the oil is suf-
ficiently filled.
11. Close the screw plug.
12. Close the front panel.
13. Attach the fresh oil bottle and the used oil bottle.
14. Connect the end connectors of the service
hoses (Fig. 7, Pos. 2) to the hose connections
(Fig. 7, Pos. 1). Observe the red / blue identifica-
tion stickers on the front panel before connecting
the hoses. Tighten the hose connections.
15. Connect the power cable to the power socket.
16. Connect the power cable to the mains supply.
17. Start the ACS 251.
18. In the main menu, select " ACS Maintenance " >>
" Maintenance ". Press E .
19. Select " Reset VAC Pump " and press E .
20. Press

to reset maintenance counter.
"
You have successfully added oil to the vacuum pump
and reset the maintenance counter.