Heating and Air Conditioning: Service and Repair

AIR CONDITIONING: REFRIGERANT: REPLACEMENT

1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM

(a) Start up the engine.

(b) Turn the A/C switch ON.

(c) Operate the cooler compressor with an engine speed of approximately 1,000 rpm for 5 to 6 minutes to circulate the refrigerant and collect the compressor oil remaining in each component into the cooler compressor.

(d) Stop the engine.

(e) Recover the refrigerant from the A/C system using a refrigerant recovery unit.

2. CHARGE REFRIGERANT

(a) Perform vacuum purging using a vacuum pump.

(b) 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:

for 2AR-FE:

450 +-30 g (15.9 +-1.1 oz.)

for 2GR-FE:

490 +-30 g (17.3 +-1.1 oz.)





NOTICE:
* Do not operate the cooler compressor before charging refrigerant as the cooler compressor will not work properly without any refrigerant, and will overheat.
* Approximately 100 g (3.53 oz.) of refrigerant may need to be charged after bubbles disappear. The refrigerant amount should be checked by measuring its quantity, and not with the sight glass.
3. WARM UP ENGINE

(a) Warm up the engine at less than 1,850 rpm for 2 minutes or more after charging the refrigerant.

NOTICE:
Be sure to warm up the compressor when turning the A/C switch ON after removing and installing the cooler refrigerant lines (including the compressor), to prevent damage to the compressor.

4. INSPECT FOR REFRIGERANT LEAK

(a) After recharging with refrigerant gas, inspect for refrigerant leak gas using a halogen leak detector.

(b) Perform the operation under these conditions:

* Stop the engine.

* Secure good ventilation (the gas 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 compressor is off: approximately 392 to 588 kPa (4 to 6 kgf/cm2, 57 to 85 psi)

(c) Using a gas leak detector, inspect for refrigerant leak from the refrigerant lines.





(d) If a gas leak is not detected on the drain hose, remove the blower motor control (blower resistor) from the cooling unit. Insert the gas leak detector sensor into the unit and perform the test.

(e) Disconnect the connector and leave the pressure switch on for approximately 20 minutes. Bring the gas leak detector close to the pressure switch and perform the test.