Refrigerant: Service and Repair
REFRIGERANT
Collection and Charge
SETTING OF SERVICE TOOLS AND EQUIPMENT
Discharging Refrigerant
Evacuating System and Charging Refrigerant
Procedure
WARNING:
Never breathe A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat.
Remove HFC-134a (R-134a) from A/C system using certified service equipment meeting requirements of SAE J-2210 [HFC-134a (R-134a) recycling equipment] or J-2209 [HFC-134a (R-134a) recovery equipment]. Ventilate work area before resuming service if accidental system discharge occurs. Additional health and safety information may be obtained from refrigerant and lubricant manufacturers.
1.CHECK A/C SYSTEM
1. Check that A/C system operates normally. .
2. Check if there is a large amount of leakage of refrigerant or lubricant.
CAUTION:
Never perform the lubricant return operation if a large amount of leakage of lubricant is detected.
Is the inspection result normal?
YES - GO TO 2.
NO-1 - Check for refrigerant leakage. Fluorescent Leak Detector.
NO-2 - If using electrical leak detector (SST: J-41995). Electrical Leak Detector.
2.LUBRICANT RETURN OPERATION
1. Start the engine and run it as follows.
- Engine speed: Idle � 1,200 rpm
- A/C switch: ON
- Fan speed: Maximum position
- Set temperature: Full hot
- Intake position: Recirculation (REC)
2. Perform lubricant return operation for approximately 10 minutes.
3. Stop the engine.
- GO TO 3.
3.CHECK RECOVERY/RECYCLING RECHARGING EQUIPMENT
1. Operate recovery/recycling recharging equipment.
CAUTION:
- Follow the instructions of the manufacturer for the handling or maintenance of the equipment.
- Never fill the equipment with undesignated refrigerant.
2. Check the gauge pressure of recovery/recycling recharging equipment.
Is there pressure?
YES - GO TO 4.
NO - GO TO 5.
4.DISCHARGE REFRIGERANT INSIDE PIPES
Discharge the refrigerant from the high-pressure hose and low-pressure hose of recovery/recycling recharging equipment.
- GO TO 5.
5.CONNECT RECOVERY/RECYCLING RECHARGING EQUIPMENT
1. Remove the service valve caps from the vehicle.
2. Connect recovery/recycling recharging equipment to the service valves.
- GO TO 6.
6.DISCHARGE REFRIGERANT FROM THE VEHICLE
Operate recovery/recycling recharging equipment to discharge the refrigerant from the vehicle.
- GO TO 7.
7.REMOVE ANY REMAINING REFRIGERANT
Evacuate air for approximately 10 minutes or more to remove any remaining refrigerant integrated to the compressor oil, etc.
- GO TO 8.
8.REPLACE OR REPAIR REFRIGERANT SYSTEM PARTS
1. Replace or repair the malfunctioning part.
CAUTION:
- Always use a new O-ring for the parts that the cooler system was removed.
- Apply compressor oil to the O-rings of piping when installing the piping. However, never apply it to the threads.
2. Adjust the compressor oil amount according to the replaced parts. Description.
- GO TO 9.
9.EVACUATE AIR FROM THE REFRIGERANT SYSTEM
Evacuate air from the refrigerant system for approximately 25 minutes or more.
CAUTION:
Evacuate air for at least approximately 15 minutes or more if the parts are replaced.
- GO TO 10.
10.CHECK AIRTIGHTNESS OF REFRIGERANT SYSTEM
Check the airtightness of the refrigerant system for approximately 25 minutes or more.
CAUTION:
Check the airtightness for at least approximately 15 minutes or more if the parts are replaced.
Does the pressure decrease?
YES - GO TO 11.
NO - GO TO 8.
11.CHECK REFRIGERANT LEAKAGE
1. Connect refrigerant recovery/recycling recharging equipment or manifold gauge set (SST: J-39183).
2. Charge the refrigerant of approximately 200 g (7.05 oz) to the refrigerant system.
3. Check for refrigerant leakage. Fluorescent Leak Detector.
NOTE:
When using electrical leak detector (SST: J-41995). Electrical Leak Detector.
Is the inspection result normal?
YES - GO TO 12.
NO - Repair or replace parts according to the inspection results.
12.CHARGE REFRIGERANT
1. Connect recovery/recycling recharging equipment or manifold gauge set (SST: J-39183).
2. Evacuate air again.
3. Charge the specified amount of refrigerant to the refrigerant system.
- GO TO 13.
13.CHECK REFRIGERANT LEAKAGE
Check for refrigerant leakage again. Fluorescent Leak Detector.
NOTE:
When using electrical leak detector (SST: J-41995). Electrical Leak Detector.
Is the inspection result normal?
YES - GO TO 14.
NO - GO TO 6.
14.CHECK OPERATION
Check the A/C system for normal operation. Refrigeration System.
Is the inspection result normal?
YES - GO TO 15.
NO - Repair or replace parts according to the inspection results.
15.CHECK RECOVERY/RECYCLING RECHARGING EQUIPMENT
1. Disconnect recovery/recycling recharging equipment or manifold gauge set (SST: J-39183).
2. Discharge the refrigerant from the high-pressure hose and low-pressure hose of the recovery/recycling recharging equipment.
3. Install the service valve caps.
- INSPECTION END