Robinair 34100 Automatic A-C Charging Station - Manual (Page 9)

7 R-134a Smart Cart ® Automatic A/C Charging Station
2. Compare the gauge pressure read-
ings to the system manufacturer’s
specifications.
3. Check the cool air vent discharge
temperature to be sure that the
system cooling is acceptable.
TO DISCONNECT THE SYSTEM
1. Turn off the A/C system.
▲
WARNING
▲
Disconnect hoses with extreme caution!
All hoses may contain liquid refrigerant
under pressure.
Read and follow all
warnings at the beginning of this manual
before operating the unit.
2. Disconnect the blue and red hose
couplers from the A/C system.
3. Replace the caps on all fittings. Store
the hoses on the cart, and store the
couplers by connecting them to the
coupler rack.
!
If the signal continues and the
display does not count down, press
the HOLD key and replace the tank
as described in “Installing a Refriger-
ant Tank.” Press the CONT key to
complete the automatic cycle, or
press RESET to access the program
mode.
7. When the automatic cycle is com-
pleted, the station beeps once, and
the message “CPL” appears on the
display, followed by the “HOLD”
message. Press any key to access the
program mode.
TO CHECK FINAL SYSTEM OPERATION
Before disconnecting the A/C system
from the station, you should check that it
is operating properly.
CAUTION! Before starting the A/C
system, be sure both valves on the
station’s manifold are closed.
1. Run the A/C system until the gauge
readings stabilize.
Operating
Procedures
!
Follow these instructions to properly
maintain your automatic A/C charging
station. Be sure to wipe up any spills
immediately and keep the station clean.
STORING THE STATION
1. Turn off the MAIN POWER switch,
and unplug the station.
2. Store the hoses on the cart, and store
the couplers by connecting them to
the coupler rack.
3. Close all valves when the station is
not in use.
MAINTAINING THE VACUUM PUMP
1. Check the vacuum pump oil daily,
and add oil as necessary. The proper
level is at the midpoint of the sight
glass when the vacuum pump is
running and the A/C system is under
vacuum.
Note: Use only our Premium High
Vacuum Pump Oil (see “Replacement
Parts List”).
2. For maximum efficiency and longer
pump life, change the vacuum pump
oil frequently (approximately after
every four hours of running time).
Read and follow the detailed instructions
in the vacuum pump operating manual
to change oil.
CHECKING THE SCALE ACCURACY
You should routinely check the accuracy
of the scale platform and calibrate the
scale, if necessary, to assure that the unit
charges accurately.
1. While in the PROGRAM mode,
simultaneously press the ENTER and
zero keys on the keypad to clear the
display.
2. Press the “6” key on the keypad to
display the approximate scale
platform weight.
3. Remove the tank from the scale
platform. The empty platform weight
displayed should range from + two
pounds. If it does not, contact the
factory.
Maintenance
Instructions