Mitsubishi Eclipse 1990, Service Manual

Page: 2055 / 2103

HEATER, AIR
AND VENTILATION
On-vehicle
REFRIGERANT LEAK REPAIR
LOST CHARGE
If the system has lost all charge due to a leak:
1. Evacuate the system. (See procedure.)
2. Charge the system with approximately one pound of refrigerant.
3. Check for leaks.
4. Discharge the system.
5. Repair leaks.
6. Replace receiver drier.
Caution
Replacement filter-drier units must be sealed while in storage. The drier used
will absorb water/water vapor quickly upon exposure to the atmosphere. When installing a
drier, have all tools and supplies ready for quick reassembly to avoid keeping the system
open
any
longer than necessary. ,
7. 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
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 or 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 (3 in.) 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.
O-rings used on connections are not reusable.
TSB Revision