THEORY OF OPERATION
FX Series Refrigerant Management Centers feature a touch screen graphical user interface that makes operation a breeze. In this section, we
will cover each operation and what the machine is actually doing. While the screen provides much of this information during operation, the
descriptions below will offer more detail than can be displayed.
Recovery
Select “Recovery” if you want to recover and recycle refrigerant currently in the vehicle prior to opening the system for repair. This process
will begin by checking the refrigerant in the vehicle system. If the refrigerant is at least 98% pure R1234yf or R-134a, recovery will
commence automatically. If the refrigerant is less than 98% pure, the recovery function will not be allowed and the machine will vent the
hoses to prevent internal contamination of the machine and storage tank.
The recovery process creates a vacuum on the vehicle system, pulling the refrigerant into a distillation chamber. The chamber has a coil
inside that is heated by compressor outlet gas. This process distills the refrigerant (turns it to gas) and separates liquids and debris from the
refrigerant. The refrigerant passes through the chamber and compressor and is condensed into a liquid before coming to rest in the internal
storage tank.
The process ends when the machine detects that the system is void of refrigerant. The machine will display the amount recovered through-
out the process and at the end. The ending amount may be printed by pressing the icon visible on the Home screen after recovery is
completed.
Vacuum
Select “Vacuum” if the vehicle system is void of refrigerant and is ready to be recharged. Evacuating the vehicle utilizes the FX Series’ 6 CFM
vacuum pump to pull air and boil moisture from the AC system. A specific vacuum time may be selected, or one of the preset times may be
used. If a vacuum time of 15 minutes or greater is selected, vacuuming will be followed by a 2 minute leak test (vacuum decay test).
Charge
Select “Charge” to refill the vehicle system to its designed capacity. Enter the desired charge amount. An A/C Database feature is built into
the FX3030, This can be accessed by pushing the key.
The charging sequence begins with a 10-minute vacuum leak test. This is an SAE requirement in SAE J2843 (R1234yf systems only). If the
system passes the vacuum leak test, the machine will charge the system to 15% of the selected charge. At this time, an electronic leak detec-
tor meeting SAE J2913 for R1234yf is used to leak test the evaporator(s). After performing the leak test, the user will select the appropriate
answers to the displayed questions and proceed with charging. The FX3030 will continue allowing the remaining 85% of the charge. The
FX3030 is equipped with a heat blanket to assist in completing charging, but if the FX3030 cannot complete a charge due to pressure equal-
ization, it will notify the user to close the high side coupler and start the vehicle. This process will quickly complete the charge.
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