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25| ACX2281| Maintenance
10.7 Vacuum pump oil change
After 60 hours of runtime (or 1000 hours if the Long
Life Pump test is completed successfully), the
vacuum pump oil must be replaced.
1. Disconnect ACX2281 from power.
2. Using a flathead screwdriver, rotate the front locking
screw and lift the front housing.
Fig. 29: Changing vacuum pump oil
1
Oil filling plug
2
Oil inspection window
3
Lower drain plug
3. Place a bowl under the vacuum pump oil drain hole.
Remove the upper filling plug and the lower drain plug to
allow the oil to drain from unit.
4. Once the pump has been emptied, reinstall the lower
drain plug.
5. Fill the pump with new oil through the upper fill port using
a funnel if needed. Fill until the oil appears halfway up the
oil level inspection window.
6. Once the pump has been filled, reinstall the upper fill
plug.
7. Close front housing and secure locking screw.
8. Connect to power and turn on.
9. From the MAINTENANCE menu, press
until
PUMP OIL REPLACEMENT is highlighted and press
arrow. Press the RESET key to set the counter. The level
and clearness of the vacuum pump oil can be checked by
removing the rubber plug located on the front-left side of
the unit.
10.8 Replace filter dryer
Unit operation is disabled at the end of the filter service life.
Each filter is marked with a unique code. This code must be
entered when replacing the filter. It is not possible to operate the
ACX2281 if the same code is re-used. It is advisable to keep a
supply of filters in stock to avoid downtimes due to the unit being
disabled.
The ACX2281 is disabled once 90kg (198lb) of R1234yf
refrigerant has passed through the filter. A new filter must be
installed and its unique code entered in the ACX2281 before
vehicle A/C service can be performed.
Fig. 30: Changing filter dryer
1
Filter dryer
1. To begin the filter replacement process, from the MAINTENANCE
menu, scroll until FILTER REPLACEMENT is highlighted and press
arrow.
2. Insert the new filter code using the keypad.
3. Using a flathead screwdriver, rotate the front locking screw and lift the
front housing.
4. Verify that the 2 o-rings are included and positioned correctly prior to
attaching to housing.
5. Loosen the filter using a 1-3/8”
(35mm) wrench.
6. Remove the filter
7. Insert a new filter
8. Tighten the filter to 74 ft-lbs (100N-m)
9. Carefully close front housing and
secure locking screw.
10. Allow unit to perform the automatic
leak test requested by the software
when unit loads
Warning - Risk of frostbite from escaping
refrigerant
Refrigerant causes severe frostbite on the
skin.
Check the service hoses for damage.
Firmly connect the service quick-release
couplings to the service hoses.
Wear protective goggles.
Wear protective gloves.
