Infiniti FX35, FX50 (S51). Manual - part 1128

REFRIGERANT

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PERIODIC MAINTENANCE

REFRIGERANT

Collection and Charge

INFOID:0000000005249896

SETTING OF SERVICE TOOLS AND EQUIPMENT

Discharging Refrigerant

Evacuating System and Charging Refrigerant

Procedure

1.

Shut-off valve

2.

A/C service valve

3.

Recovery/recycling recharging 
equipment

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1.

Shut-off valve

2.

A/C service valve

3.

Recovery/recycling recharging 
equipment

4.

Refrigerant container (HFC-134a)

5.

Weight scale (J-39650)

6.

Vacuum pump (J-39649)

7.

Manifold gauge set (J-39183)

A.

Preferred (best) method

B.

Alternative method

C.

For charging

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REFRIGERANT

WARNING:

Never breath 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 equip-
ment]. 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. Refer to 

HAC-5, "WITHOUT ACCS : Description & Inspection"

(WITHOUT ACCS) or 

HAC-8, "WITH ACCS : Description & Inspection"

 (WITH ACCS).

2.

Check if there is a large amount of leakage of refrigerant or oil. 

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

>> Check for refrigerant leakage. Refer to 

HA-34, "Inspection"

.

2.

LUBRICANT RETURN OPERATION

1.

Start the engine and run it as follows. 

-

Engine speed: Idle – 1,200 rpm

-

A/C switch: ON

-

Blower speed: Max. 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

REFRIGERANT

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Evacuate air for approximately 10 minutes or more to remove any remaining refrigerant integrated to the com-
pressor 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. Refer to 

HA-29, "Maintenance of Lubri-

cant Quantity"

.

>> 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. Refer to 

HA-34, "Inspection"

.

NOTE:
When using electrical leak detector (SST: J-41995). Refer to 

HA-35, "Inspection"

.

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. Refer to 

HA-34, "Inspection"

.

NOTE:
When using electrical leak detector (SST: J-41995). Refer to 

HA-35, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> GO TO 6.

14.

CHECK OPERATION

Check the A/C system for normal operation. Refer to 

HA-32, "Inspection"

.

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REFRIGERANT

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