CPS FX1234, Service Manual, Page: 8 / 57

8
CHARGE LOW SIDE
NOTE: FX1234 and FX3030 will have addition steps in charging according to J2743. There will be a 10 minute vacuum test.
The first 5 minutes the vacuum pump mode will run. ( See Vacuum Plumbing Schematic ) Then the second 5 minutes of the
vacuum leak test is where it checks for vacuum loss. Then a 15% of programmed charge is released for pressurizing A/C for
manual leak check using electronic leak detection. The unit will complete charge once all has passed as instructed below.
Using the keypad to program the desired charge, the liquid refrigerant from the storage tank will pass through the
FILTER DRIER (F2). This completes the third and final procedure of the recycling process. Once through the
FILTER DRIER (F2), the liquid refrigerant will then pass through the open CHARGING SOLENOID VALVE
(LS1). The liquid refrigerant will then pass through the open Low Manifold valve (LV2) and onward through the
Low service hose. After the required amount of refrigerant is charged, the control PCB de-energizes charging
solenoid valve (LS1). The LCD display charge complete, and ask if you want to go to Car Health. If you select to
use Car Health the screen will ask you to start car, and low side (LV2) will open and allow running pressures to be
seen at the pressure transducers. The screen will then display digital manifold and operating pressures on hi and low
side of A/C system. If you choose not use the Car Health, then the screen will ask you to close hi coupler and start
cars A/C system. The low and hi service hoses will then open (LV1 and LV2) and allow suction of car A/C
compressor to clear hoses.