Refrigerant Charging Procedure: Procedure

Courtesy of SUBARU OF AMERICA, INC.

1. Check that all valves are fully closed.
2. Install the low/high pressure hoses to the service ports on the low/high pressure sides of the vehicle respectively.
   CAUTION: Confirm that the connections are secure.
3. Connect the center manifold hose of the manifold gauge to the vacuum pump.

1. Open the low-pressure side valve, high-pressure side valve and center valve.
2. Operate the vacuum pump.
3. Perform evacuation for 5 minutes or more, and when the low pressure gauge needle reaches -0.1 MPa (-1 kgf/cm² , -14 psi), close the center manifold hose valve, and stop the vacuum pump.
4. Leave alone for 5 to 10 minutes after closing the low pressure valve and high pressure valve, and check whether there is any change in the low pressure gauge needle indication.

   If the needle position changes, this indicates a leak. Check the pipe and hose connections, and repair the location with the problem.

   After repair, retry charging the refrigerant from the step (1).

5. If there is no leakage, continue evacuation for additional 20 - 30 minutes, close all valves and then stop the vacuum pump.

Preparation items  : Refrigerant: Ref. to AIR CONDITIONER>GENERAL DESCRIPTION SPECIFICATION>REFRIGERANT .

1. Follow the can tap operation manual to attach it to the refrigerant can.
2. Disconnect the center manifold hose from the vacuum pump, and connect the hose to the tap valve.
   NOTE: When 13.6 kg (30 lb) refrigerant container (1) is used, measure the amount of refrigerant with a refrigerant charging scale (2), and connect with the center manifold hose.

   Courtesy of SUBARU OF AMERICA, INC.

3. Open the tap valve of the supply container (refrigerant can or refrigerant container).
4. Loosen the center manifold hose connection on the manifold gauge for a few seconds (if there is a purge valve on the manifold gauge, push this instead) to allow the air in the center manifold hose to be bled by the refrigerant pressure.
5. Open the low pressure valve and high pressure valve of the manifold gauge to fill with refrigerant.
   NOTE: If the supply container is empty, close all manifold gauge valves and the tap valve of the supply container, and replace the empty supply container with a new one. After replacing with a new supply container, perform air purge, and resume the filling operation.
6. If the low pressure gauge indicates approximately 0.2 MPa (2 kgf/cm² , 29 psi) or refrigerant filling efficiency drops, close the low pressure and high pressure valves.
7. Check that the low pressure valve and high pressure valve are closed, turn off the A/C switch and start the engine.
   CAUTION:

   • When filling operation is performed with the engine running, do not open the high pressure valve. Always fill from the low pressure valve.
   • Do not start the engine before charging refrigerant.
8. To prevent damage to the compressor, push the A/C switch ON-OFF quickly a few times.
9. Set the vehicle to the following conditions.

   Item	Condition
   Engine speed	1, 500 r/min
   A/C switch	ON
   Temperature setting	LO (MAX COOL)
   Fan speed	HI (MAX)
   FRESH/RECIRC position	RECIRC
   Air flow control position	VENT
   Window	OPEN

10. Open the low pressure valve, check the refrigerant pressure with a manifold gauge and fill with refrigerant up to the specified amount. Ref. to AIR CONDITIONER>REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET>INSPECTION>INSPECTION WITH PRESSURE SYMPTOM .