LOST CHARGE
If the system has lost all charge due to a leak:- Evacuate the system (Refer to
).
- Charge the system with approximately 550 g of refrigerant.
- Check for leaks.
- Discharge the system.
- Repair leaks.
CAUTION- Replace receiver drier.
- Evacuate and charge system.
LOW CHARGE
If the system has not lost all of its refrigerant charge;
locate and repair all leaks.
If it is necessary to increase the system pressure to find the leak (because of an especially
low charge) add refrigerant. If it is possible to repair the leak without discharging the refrigerant
system, use the procedure for correcting low refrigerant level.HANDLING TUBING AND FITTINGS
Kinks in the refrigerant tubing or sharp bends in the refrigerant hose lines will greatly
reduce the capacity of the entire system. High pressures are produced in the system when it
is operating. Extreme care must be exercised to make sure that all connections are pressure
tight. Dirt and moisture can enter the system when it is opened for repair or replacement of lines
or components. The following precautions must be observed. The system must be completely discharged
before opening any fitting of connection in the refrigeration system. Open fittings with caution even
after the system has been discharged. If any pressure is noticed as a fitting is loosened, allow trapped
pressure to bleed off very slowly.Never attempt to rebend formed lines to fit. Use the correct line for the installation you are servicing. A good rule for the flexible hose lines is keep the radius of all bends at least 10 times the diameter of the hose.
Sharper bends will reduce the flow of refrigerant. The flexible hose lines should be routed so that they are at least 80 mm from the exhaust manifold. It is good practice to inspect all flexible hose lines at least once a year to make sure they are in good condition and properly routed.
On standard plumbing fittings with O-rings, these O-rings are not reusable.