Robinair 34788-H Recovery, Recycling, Recharging Unit - Manual (Page 10)

8
Operating Instructions
Recover Refrigerant from a Vehicle
1. Empty the oil drain bottle located on the right-
hand side of the unit, if necessary, or make note
of the current oil level. See Figure 5.
2. Connect the high- and low-side hoses to the
vehicle A/C system.
3. Open the coupler valves on the hoses.
4. Press the RECOVER button.
Note: The clicking noise heard during the recovery
process indicates the solenoid is opening and
closing — this is normal.
5 . When the system has recovered to 0 psi, the
vacuum pump automatically starts and runs until
recovery is complete. The unit then goes into an
automatic oil drain—this may require up to 90
seconds to complete.
6. After the oil drain is complete, the display shows
RECOVER COMPLETE
RECOVERED XX.XX LBS. (X.XX KG)
CHECK OIL BOTTLE
Note: The displayed recovered weight can vary,
depending on ambient conditions, and should not
be used as an indicator of scale accuracy.
7. Check the oil drain bottle, and note the amount
of oil that was removed from the A/C system.
This is the amount of new oil that must be
charged into the A/C system after the service is
complete.
• Use only new oil to replace the oil removed
during the recycling process.
• Dispose of used oil according to local, state,
and federal regulations.
Recovery is complete. You are now ready to either
advance to the charge process, or to make repairs
to the A/C system followed by the evacuation
process.
Figure 5
Operating Tips
After the RECOVER function is selected :
• If system pressure is below 10 psi, the
display reads
LOW RECOVER PRESSURE
CHECK CONNECTIONS
until pressure increases, or the START /
YES button is pressed. Verify the high- and
low-side hoses are connected and coupler
valves are open. Press STOP / NO to exit.
• If 100 lbs. (45 kg) or more of refrigerant has
been recovered since the last filter-drier
change, the display reads
FILTER WEIGHT XXX LB (XX KG)
To meet SAE J-2788 requirements, it is
mandatory to replace the filter-drier after
150 lbs. (68 kg) of refrigerant has been
filtered. The unit gives a warning to replace
the filter when filter weight reaches 100 lbs.;
when filter weight reaches 150 lbs., the unit
locks out and ceases to operate. Refer
to instructions outlined in the Maintenance
section under Replace the Filter-Drier.
Oil Drain
Bottle