Mazda 2: Refrigerant Charging

Mazda 2 2007-2014 Service Manual / HVAC / Refrigerant Charging

CAUTION:

Charging Recycled R-134a Refrigerant

1. Connect an R-134a recovery/recycling/recharging device to the vehicle and follow the device manufacturer's instructions.

Charging Preparation

1. Install the manifold gauge set.

2. Connect the tap pin side of the charging hose to the air purge valve of the manifold gauge.

Mazda 2. REFRIGERANT CHARGING

3. Connect the vacuum pump hose to the center joint of the manifold gauge.

4. Connect the vacuum pump hose to the vacuum pump.

5. Connect the charging hose to the refrigerant tank.

6. Place the refrigerant tank on the scale.

Regular amount of refrigerant (approx. quantity)

Evacuation

1. Open all the valves of the manifold gauge.

CAUTION:

2. Start the vacuum pump and let it operate for 15 min.

Mazda 2. REFRIGERANT CHARGING

3. Verify that high- and low-pressure side readings of the manifold gauge are at -101 kPa {-760 mmHg, -29.9 inHg}. Close each valve of the manifold gauge.

Mazda 2. REFRIGERANT CHARGING

Airtightness Check

1. Stop the vacuum pump and wait for 5 min.

2. Check the high- and low-pressure side readings of the manifold gauge.

Charging New R-134a Refrigerant

1. Open the valve of the refrigerant tank.

2. Weigh the refrigerant tank to charge the suitable amount of refrigerant.

WARNING:

CAUTION:

3. Open the high-pressure side valve of the manifold gauge.

Mazda 2. REFRIGERANT CHARGING

4. When the low-pressure side reading increases to 0.098 MPa {1.0 kgf/cm2, 14 psi}, close the high-pressure side valve of the manifold gauge.

Mazda 2. REFRIGERANT CHARGING

5. Inspect for leakage from the cooler pipe/hose connections using the gas leak tester.

6. Inspect for leakage again.

WARNING:

7. Open the high-pressure side valve of the manifold gauge and charge with refrigerant until the weight of refrigerant tank has decreased 250 g {8.82 oz} from the amount in Step 2.

Mazda 2. REFRIGERANT CHARGING

8. Close the high-pressure side valve of the manifold gauge.

Mazda 2. REFRIGERANT CHARGING

WARNING:

9. Start the engine and actuate the A/C compressor.

10. Open the low-pressure side valve of the manifold gauge and charge with refrigerant until the weight of the refrigerant tank has decreased regular amount from the amount in Step 2.

Mazda 2. REFRIGERANT CHARGING

11. Close the low-pressure side valve of the manifold gauge and the valve of the refrigerant tank.

12. Stop the engine and A/C compressor.

Leak Test

1. Inspect for leakage using the gas leak tester.

2. Inspect for leakage again.

3. Disconnect the quick couplers from the charging valves.

4. Install the caps to the charging valves.

Mazda 2. REFRIGERANT CHARGING

REFRIGERANT RECOVERY

1. Connect an R-134a recovery/recycling/recharging device to the vehicle and follow the device manufacturer's instructions.

REFRIGERANT PRESSURE CHECK

1. Install the manifold gauge. (See REFRIGERANT SYSTEM GENERAL PROCEDURES).

2. Start the engine and after it is warmed up, run it at a constant 1,500 rpm.

3. Set the fan speed MAX HI.

4. Turn the A/C switch on.

5. Set to RECIRCULATE mode.

6. Set the temperature control to MAX COLD.

7. Set to VENT mode.

8. Close all the doors and all the windows.

9. Measure the ambient temperature and high- and low- pressure side reading of the manifold gauge.

10. Verify that the intersection of the pressure reading of the manifold gauge and ambient temperature is in the shaded zone.

Mazda 2. REFRIGERANT PRESSURE CHECK

REFRIGERANT SYSTEM PERFORMANCE TEST

1. Inspect the refrigerant pressure. (See REFRIGERANT PRESSURE CHECK).

2. Place a dry-bulb thermometer in the driver-side center ventilator outlet.

3. Start the engine and after it is warmed up, run it at a constant 1,500 rpm.

4. Set the fan speed to MAX HI.

5. Turn the A/C switch on.

6. Set to RECIRCULATE mode.

7. Set the temperature control to MAX COLD.

8. Set to VENT mode.

9. Close all the doors and windows.

10. Wait until the air conditioner output temperature stabilizes.

Stabilized condition

11. After the blower air is stabilized, read the dry-bulb thermometer.

12. Verify the ambient temperature.

13. Verify that the temperature reading is in the shaded zone.

Mazda 2. REFRIGERANT SYSTEM PERFORMANCE TEST

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