Robinair 34100 Automatic A-C Charging Station - Manual (Page 7)

5 R-134a Smart Cart ® Automatic A/C Charging Station
Operating
Procedures
Summary Chart of Operating Procedures
TO DIAGNOSE SYSTEM PROBLEMS
1. Start the A/C system and watch the
gauge pressures (refer to the
manufacturer’s specifications for
proper operating pressures).
2. Perform any other visual and diag-
nostic inspections recommended by
the manufacturer.
3. If the A/C system is operating prop-
erly, disconnect the hose couplers
from the A/C system. To recharge or
make necessary repairs, see the
appropriate sections that follow.
TO ADD REFRIGERANT TO PARTIALLY
CHARGED SYSTEMS
1. In the program mode, press ADD .2
lbs. REFRIG. The messages “AUTO-
MATIC” and “REFRIGERANT”
appear on the display.
2. Open the low side valve. The station
dispenses .2 pounds (.1 kilograms) of
refrigerant, then displays the mes-
sage “CPL.” Close the low side valve.
3. Monitor the A/C system operating
pressures. Correct any low charge
indications by pressing RESET
CYCLE; repeat Step 1 as necessary.
Note: There are other A/C system prob-
lems which cause symptoms similar to a
low refrigerant charge — refer to your
operator’s manual or a reliable A/C
troubleshooting chart. If adding one
pound of refrigerant does not correct the
low charge symptoms, you may need to
recover and/or recharge refrigerant, as
described next.
Before operating the 220V 50Hz model,
plug the short power cord from the upper
control box into the outlet on the lower
power box. Plug the main power cord
into a 220V 50Hz power source that is
free from transients and electrical noise.
The chart below summarizes the steps in
each of the following sections.
TO ATTACH HOSES TO THE SYSTEM
1. Be sure all valves on the manifold are
closed.
▲
WARNING
▲
Connecting hoses to the wrong ports
may cause personal injury or may
damage the equipment.
Check your A/C
system operating manual for the correct
hook-up.
Use only with refrigerant type R-134a!
Cross-contamination with other refriger-
ant types will cause severe damage to the
station and to tools and equipment.
Do not mix refrigerant types through a
system or in the same container!
2. Attach the red high side hose’s
coupler to the high side of the A/C
system.
3. Attach the blue low side hose’s
coupler to the low side of the A/C
system.
Note: The manifold is ported so that the
gauges indicate pressure whether or not
the valves are open.
! !
SUMMARY
1. Attach hoses to the A/C system.
2. Start the A/C system and compare operating pressures to
manufacturer’s specifications.
3. Add a partial charge, if necessary.
4. Discharge the A/C system, if required.
5. Program the vacuum/recharge cycles.
6. Start the A/C system and perform final operating check.
7. Disconnect the hoses from the A/C system.