CPS FX1234, Service Manual, Page: 9 / 57

9
CHARGE HI 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.
The a/c system should be in a deep vacuum before proceeding. After 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 HI Manifold valve (LV1) and onward through the HI, Lo, or both service hoses depending on
what was selected. After the required amount of refrigerant is charged, the control PCB de-energizes charging
solenoid valve (LS1). The LCD display will read “CHARGE COMPLETE” and give an audible signal.