Dometic Waeco AirCon Service KSS Pingo R134a Operating Manual page 114

Service tasks
3. Place a receptacle with a capacity of at least a ½ litre under the A/C
service unit. The oil from the vacuum pump flows through the open-
ing (I) in the base of the device.
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.
"R134a from system" indicates how many grams of refrigerant have
been extracted from air conditioning systems using the menu item "Short
selection" or "Free selection" since the last reset (see date).
114
G
H
I
J
R134a from system
g.
STOP-EXIT
07/03/14
1455
Pingo
EN