Heating and Air Conditioning: Service and Repair
REPLACEMENT1. DRAIN REFRIGERANT
a. Turn the A/C switch ON.
b. Operating the cooler compressor at the engine rpm of approx. 1000 for 5 to 6 minutes, circulate the refrigerant and collect compressor oil remaining in each component into the cooler compressor as much as possible.
c. Stop the engine.
d. Recover the refrigerant.
SST 07117-58060 (07117-58080, 07117-58090, 07117-78050, 07117-88060, 07117-88070, 07117-88080)
2. CHARGE REFRIGERANT
a. Using a vacuum pump, perform a vacuum pumping.
b. Supply refrigerant, HFC-134a (R134a).
Standard: 600 ± 50 g (21.16 ± 1.76 oz.)
SST 07110-58060 (07117-58060, 07117-58070, 07117-58080, 07117-58090, 07117-78050, 07117-88060, 07117-88070, 07117-88080), 07117-48130, 07117-48140
3. WARM UP ENGINE
4. INSPECT LEAKAGE OF REFRIGERANT
a. Perform in these conditions:
- Stop engine.
- Secure good ventilation (If not the gas leak detector may react to volatile gases witch are not refrigerant, such as evaporated gasoline and exhaust gas.)
- Repeat the test 2 or 3 times.
- Make sure that there is some refrigerant remaining in the refrigeration system. When compressor and magnetic clutch is OFF: approx. 392 - 588 kPa (4 - 6 kgf/sq.cm, 57 - 85 psi)
b. Bring the gas leak detector close to the drain hose before performing the test.
HINT: After the blower motor stopped, leave the cooling unit for more than 15 minutes.
- Expose the gas leak detector sensor the under the drain hose.
- When bring the gas leak detector close to the drain hose, make sure that the gas leak detector does not react to the volatile gases.
If such reaction is unavoidable, the vehicle must be lifted up.
c. If gas leak is not detected on the drain hose, remove the blower motor linear controller from the cooling unit. Then insert the gas leak detector sensor into the unit and perform the test.
d. Disconnect the connector and leave the pressure switch for approx. 20 minutes. Then bring the gas leak detector close to the pressure switch and perform the test.
e. Bring the gas leak detector close to the refrigerant lines and perform the test.