Refrigerant Replacement
REPLACEMENT1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM
a. Start the engine.
b. Turn the A/C switch ON.
c. Operate the cooler compressor with the engine running at approximately 1,000 rpm for 5 to 6 minutes.This will circulate the refrigerant and collect Compressor oil remaining in each component into the cooler compressor as much as possible.
d. Stop the engine.
e. Recover system refrigerant from high and low side ports using an approved refrigerant recovery unit(SST).
SST 07110-58060 (07117-58080, 07117-58090, 07117-78050,07117-88060, 07117-88070, 07117-88080)
2. CHARGE REFRIGERANT
a. Perform vacuum purging using a vacuum pump.
b. Charge 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)
NOTE:
- Do not operate the cooler compressor before charging refrigerant. Operating the cooler compressor without any refrigerant causes the compressor to overheat.
- Approximately 100 g (3.53 oz.) of refrigerant may need to be charged after bubbles disappear. The refrigerant amount should be checked by quantity, not with the sight glass.
3. WARM UP ENGINE
a. After charging refrigerant, warm up the engine at less than 2,000 rpm for 2 minutes or more.
NOTE: After removing/installing the A/C refrigerant lines (including the compressor), do not turn the A/C switch ON until the engine and compressor are warmed up. Turning on the A/C switch too soon will damage the compressor.
4. CHECK FOR LEAKAGE OF REFRIGERANT
a. After recharging the refrigerant gas, prepare the vehicle for a refrigerant gas leakage check by making sure the following conditions are met.
1. The ignition switch is OFF.
2. The vehicle is in a place with good air ventilation and without any volatile gases, such as evaporated gasoline or exhaust gas. The detector is very sensitive to volatile gases. If volatile gases are unavoidable,the vehicle must be lifted up.
3. Some refrigerant is remaining in the refrigerant system.
4. The compressor is OFF and its pressure is approximately 392 to 588 kPa (4 to 6 kgf/sq.cm).
b. Check for refrigerant gas leakage from the refrigerant line.
1. After the blower motor stops, wait at least 15 minutes.
2. Using a halogen leak detector, check that gas is not leaking from the refrigerant line.
If leakage is found, tighten parts or replace damaged parts as necessary to stop the leak.
c. Check for refrigerant gas leakage from the drain hose.
1. Hold the halogen leak detector so that the sensor is under the drain hose, as shown in the illustration.
2. Check that gas is not leaking from the drain hose.
If leakage is found, tighten parts or replace damaged parts as necessary to stop the leak.
d. Check for refrigerant gas leakage from the cooling unit.
1. Remove the blower motor control from the unit. Insert the halogen leak detector's sensor into the unit.
2. Check that gas is not leaking from the unit.
If leakage is found, tighten parts or replace damaged parts as necessary to stop the leak.
e. Check for refrigerant gas leakage from the pressure switch.
1. Disconnect the pressure switch connector and wait approximately 20 minutes.
2. Using a halogen leak detector, check that gas is not leaking from the pressure switch.
If leakage is found, tighten parts or replace damaged parts as necessary to stop the leak.
f. Repeat steps (a) to (d) 2 or 3 times.