Waeco AirConServiceCenter BMW5500G RPA Operating Manual page 128

Service tasks
3. Place a receptacle with a capacity of at least ½ litre under the
AirConServiceCenter. The oil from the vacuum pump flows through
the opening (I) in the base of the unit.
4. Unscrew the oil filling plug (G).
5. To drain the oil, unscrew the oil drain plug (J).
6. Once the oil has been completely drained from the pump housing,
screw the oil drain plug (J) back in.
7. Top up with new vacuum pump oil to the middle of the sight glass (H)
and screw the oil filling plug (G) back in.
8. Put the front panel and control panel back on and reconnect the
power plug.
I
NOTE
After finishing the service tasks, you must delete the respective service
messages (counter reset). To do this, switch to the "Other selections"
– "Service" menu and enter the code "7782". Use the cursor keys 
or  to select the required entry and press ENTER to confirm. Follow
the display instructions, and press and hold the ENTER button for
3 seconds. Switch back to the previous selection using STOP.
When changing the vacuum pump oil, the counter "Vacuum time"
must be reset.
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BMW5500G RPA
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