Robinair ACR2005 Air Conditioning and Refrigerant Service Solution - Manual (Page 19)

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ACR2005 Refrigerant Service Solution
Operating Instructions
! ! NOTE: If you have entered the RECOVERY mode through the SNAPSHOT
mode, the unit will automatically return to SNAPSHOT when you exit
RECOVERY, and will give you an updated printout.
MAKING REPAIRS
When all refrigerant has been removed from the vehicle, disconnect the unit
from the vehicle; close the high- and low-side service coupler valves, then
disconnect the hoses from the vehicle access ports. Make any repairs or
component replacements.
PULLING A VACUUM
Before recharging a vehicle, it is critical that you evacuate the system to remove
any air. Air can affect system operation, but evacuation ensures that air and other
contaminants have been removed, and the system is ready for a recharge.
1. If you have disconnected the ACR2005 to make repairs, reconnect the blue
low-side and red high-side service hoses, and open the service connectors.
2. Press the VACUUM key (or press the SCROLL MENU key to find the
correct screen with the VACUUM function, then press the VACUUM key)
to begin operation. OR, from the SNAPSHOT recovery mode, press the
SNAPSHOT SUMMARY key, then press the MAIN MENU key.
3. The default evacuation time of 3.00 minutes appears on the screen. This
function provides a minimum of three minutes of evacuation, and will then
shut off if a vacuum of 28" Hg is achieved.
4. If you desire to evacuate for more than three minutes, change the time
using the numeric keypad, or use the UP arrow to increase the time.
5. Press the START key to accept the evacuation time and begin the process.
6. When the unit reaches a vacuum of 28" Hg, the red indicator light flashes
and the beeper sounds to indicate the process is complete. If 28" Hg is not
achieved after 10 minutes of evacuation, the process stops, the light and
beeper signal that attention is needed, and you are prompted to check for a
leak.
NOTE: Depending on your altitude, you may not be able to achieve 28" Hg.
For this reason, it is important that the altitude setting in the Setup Menu is
correct for your location. The ACR2005 uses this information to calculate and
provide an equivalent set point for your altitude. (For instance, at 7000 feet,
the ACR2005 pulls to 21" Hg before completing an evacuation.)