REFRIGERANT(for HFC-134a(R134a)) REPLACEMENT

PROCEDURE

1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM

   
   

   1. Start the hybrid system.

   2. Operate the cooler compressor under the conditions shown below:

      Item	Condition
      Engine Speed	Idling
      Operating Time	3 minutes or more
      A/C Switch Status	on
      Blower Switch Status	HI
      Set Temperature	MAX COOL

      This causes most of the compressor oil from the various components of the A/C system to collect in the A/C compressor.

      Note

      It is not necessary to operate the cooler compressor if the A/C does not operate because of compressor lock, etc.

   3. Stop the hybrid system.

   4. Recover the refrigerant from the A/C system using a refrigerant recovery unit.

      Tech Tips

      Use the refrigerant recovery unit in accordance with the manufacturer's instruction manual.

2. CHARGE REFRIGERANT

   

   Tech Tips

   Charge refrigerant in accordance with the equipment manual.

   
   

   1. Perform vacuum purging using a vacuum pump.

   2. Charge refrigerant HFC-134a (R134a).

      SST

      09985-20010   ( 09985-02010, 09985-02050, 09985-02060, 09985-02070, 09985-02080, 09985-02090, 09985-02110, 09985-02130, 09985-02140, 09985-02150 )

      Standard charge amount
      420 to 450 g (14.8 to 15.8 oz.)

      

      Text in Illustration

      *a	Amount to be charged	*b	Charge 100 g (3.53 oz)
      *c	Mean value in proper range	*d	Point where bubbles disappear
      *e	Overcharged	*f	Pressure
      *g	Sub-cool system	*h	Refrigerant amount

      Note

      
      

      • Do not operate the cooler compressor before charging refrigerant as the cooler compressor will not work properly without any refrigerant, and will overheat.

      • The system may need to be charged with approximately 100 g (3.53 oz) of refrigerant after bubbles disappear. The refrigerant amount should be checked by measuring its quantity, and not with the sight glass.

3. WARM UP COMPRESSOR

   
   

   1. Keep the A/C switch on for at least 2 minutes to warm up the compressor.

      Note

      To prevent damage to the compressor, be sure to warm up the compressor when turning the air conditioning on after removing and installing air conditioning system lines (including the compressor).

4. INSPECT FOR REFRIGERANT LEAK

   
   

   1. After recharging the refrigerant gas, check for refrigerant gas leakage using a halogen leak detector.

   2. Perform the operation as follows:

      
      

      • Stop the hybrid system.

      • Secure good ventilation (the halogen leak detector may react to volatile gases other than refrigerant, such as evaporated gasoline or exhaust gas).

      • Repeat the test 2 or 3 times.

      • Make sure that some refrigerant remains in the refrigeration system.

        When the compressor is off: approximately 392 to 588 kPa (4 to 6 kgf/cm², 57 to 85 psi)

      Tech Tips

      It is impossible for the above pressure to be maintained if there is leakage.

   3. 

      Text in Illustration

      *1	Halogen Leak Detector

      Using the halogen leak detector, check the refrigerant line, especially at the connection points, for leakage.

   4. 

      Text in Illustration

      *1	Drain Hose
      *2	Halogen Leak Detector

      Bring the halogen leak detector close to the drain hose before performing the test.

      Tech Tips

      
      

      • After the blower motor has stopped, leave the cooling unit for at least 15 minutes.

      • Place the halogen leak detector sensor under the drain hose.

      • When bringing the halogen leak detector close to the drain hose, make sure that the halogen leak detector does not react to other volatile gases.

      If such a reaction is unavoidable, the vehicle must be lifted up.

   5. If no gas leakage is detected from the drain hose, remove the blower motor from the cooling unit. Insert the halogen leak detector sensor into the unit and perform the test.

   6. Disconnect the pressure switch connector and leave it for approximately 20 minutes. Bring the halogen leak detector close to the pressure switch and perform the test.