Robinair 34788-H Recovery, Recycling, Recharging Unit - Manual (Page 16)

14
Operating Instructions – Automatic
6. The display shows an overview of all the tests
that were selected. Press START / YES to
begin the automatic sequence.
7 . When the sequence is complete, the display
shows the amount of refrigerant that was
recovered and charged.
8. Close the high- and low-side coupler valves,
and remove the service hoses from the A/C
system. Press START / YES to clear hoses.
Operating Tips
• If the weight entered is more than the
refrigerant available in the internal tank, the
charge function will not start. The display
reads
INSUFFICIENT REFRIG.
PRESS ANY KEY TO EXIT
Refer to the Maintenance section of this manual
for instructions to Manually Fill the ISV.
• If problems are encountered during the
automatic sequence, the unit will “beep” three
times and the control panel readout will pinpoint
the problem encountered. The sequence
remains paused until the user enters a decision
regarding how to proceed.
• Before the unit begins evacuating the A/C
system during the automatic sequence, it
checks for any pressure in the system that
may damage the vacuum pump. If pressure is
detected, the unit displays
PRESSURE EXISTS
PRESS ANY KEY TO EXIT
Press any key to exit the automatic
sequence.
• If a leak test was programmed, and a leak is
detected, the unit displays
LEAK TEST FAILED
PRESS STOP TO EXIT
PRESS START TO CONTINUE
Press STOP to exit the automatic sequence
and perform needed repairs. Press START to
continue the automatic sequence despite the
failed leak test.
• To ensure an accurate leak test, it is
imperative that a thorough recovery and
evacuation of the system is performed.
During the recovery process, cold spots can
develop in the automotive system. Pockets
of refrigerant in desiccant and in system oil
will continue to vaporize as the A/C system
temperature equalizes toward ambient. As
this occurs, A/C system pressure increases,
which may be interpreted by the unit as a
leak. This varies somewhat with ambient
temperature conditions.