Mazda Training manual - part 287
AIR CONDITIONING
04 - Refrigerant Charging
SG04-3
TC070-15-01H
NOTE
When using service can, do not open the high-pressure side valve while the engine
is running. If you open, the compressed refrigerant will enter into the can causing a
burst and it may damages surroundings and you may get injured.
3. Open the high-pressure side valve.
NOTE
Always begin charging with the high-pressure side valve open. If you begin with the
low-pressure side valve, the vanes of the A/C compressor will not spread to work
properly and abnormal noise may occur.
4. When the low-pressure side reading increases to 0.098 MPa {1.0 kgf/cm
2
, 14
psi}, close the high-pressure side valve.
5. Using an electronic leak detector, inspect the system for leakage from the cooler
pipe/hose connections. (If leakage is found at a loose joint, tighten the joint, then
inspect for leakage again.)
6. Open the high-pressure side valve and charge with refrigerant until the weight of
refrigerant tank has decreased 250 g {8.83 oz} from the recorded amount in Step
2.
7. Close the high-pressure side valve.
8. Start the engine and actuate the A/C compressor.
9. Open the low-pressure side valve and charge with refrigerant until the weight of
the refrigerant tank has decreased regular amount from the recorded amount in
Step 2.
10. Close the low-pressure side valve and the valve of the refrigerant tank.
11. Stop the engine and A/C compressor.
Leak Test
1. Using an electronic leak detector, inspect the system for leakage. (If leakage is
detected at a loose joint, tighten the joint and/or repair the faulty place.)
2. Disconnect the pressure gauge from the charging valves.
4. Install the caps to the charging valves.