Infiniti FX35, FX50 (S51). Manual - part 1129

 

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Infiniti FX35, FX50 (S51). Manual - part 1129

 

 

LUBRICANT

HA-29

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LUBRICANT

Maintenance of Lubricant Quantity

INFOID:0000000005249897

The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large refrigerant leakage occurred. It is important to maintain the
specified amount.
The following malfunctions may result if lubricant quantity is not maintained normally:
• Lack of lubricant: May lead to a seized compressor.
• Excessive lubricant: Inadequate cooling (thermal exchange interference)

LUBRICANT

LUBRICANT RETURN OPERATION

Adjust the lubricant quantity according to the test group shown below.

1.

CHECK LUBRICANT RETURN OPERATION

Can lubricant return operation be performed?
• A/C system works normally.
• There is no evidence of a large amount of lubricant leakage.

CAUTION:

Never perform the lubricant return operation if a large amount of leakage of lubricant is detected.

Is it successful?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM LUBRICANT RETURN OPERATION

1.

Start the engine, and run it as following.

-

Engine speed: Idle – 1,200 rpm

-

A/C switch: ON

-

Blower 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.

REPAIR OR REPLACE MALFUNCTIONING PART

1.

Repair or replace the malfunctioning part.

2.

Perform the lubricant adjustment depending on the replaced part.

Compressor >>Refer to 

HA-30, "Lubricant Adjusting Procedure for Compressor Replacement"

.

Except compressor >>Refer to 

HA-29, "Lubricant Adjusting Procedure for Components Replacement Except

Compressor"

.

Lubricant Adjusting Procedure for Components Replacement Except Compressor

INFOID:0000000005249898

Add the correct amount of lubricant to the system after replacing any of the following major components.
Amount of lubricant to be added:

Name

: NISSAN A/C System Oil Type S

Replaced parts

Lubricant to be added to system

Remarks

Amount of lubricant

m

 (US fl oz., Imp fl oz.)

Evaporator

75 (2.5, 2.6)

Condenser

35 (1.2, 1.2)

HA-30

< PERIODIC MAINTENANCE >

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LUBRICANT

*1: No addition of lubricant is needed if the refrigerant leakage is small.

Lubricant Adjusting Procedure for Compressor Replacement

INFOID:0000000005249899

1.

Check recovery/recycling recharging equipment gauges before connecting recovery/recycling recharging
equipment to vehicle. No refrigerant pressure should be displayed. Recover refrigerant from equipment
lines if NG.

2.

Connect recovery/recycling recharging equipment to vehicle. Confirm refrigerant purity in supply tank
using recovery/recycling recharging equipment and refrigerant identifier. Refer to 

HA-12, "Working with

HFC-134a (R-134a)"

 if NG.

3.

Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrig-
erant identifier. If NG, refer to 

HA-12, "Working with HFC-134a (R-134a)"

.

4.

Discharge refrigerant into the recovery/recycling recharging equipment. Measure lubricant discharged into
the recovery/recycling recharging equipment.

5.

Drain the lubricant from the old (removed) compressor into a graduated container and recover the amount
of lubricant drained.

6.

Drain the lubricant from the new compressor into a separate. Then clean container.

7.

Measure an amount of new lubricant installed equal to amount drained from old compressor. Add this
lubricant to new compressor through the suction port opening.

8.

Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant
to new compressor through the suction port opening.

9.

Add another 5 m  (0.2 US fl oz., 0.2 Imp fl oz.) of lubricant at this time if the liquid tank also needs to be
replaced.

Liquid tank

10 (0.3, 0.4)

In case of refrigerant leakage

30 (1.0, 1.1)

Large leakage

Small leakage

 *1

Replaced parts

Lubricant to be added to system

Remarks

Amount of lubricant

m

 (US fl oz., Imp fl oz.)

LUBRICANT

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Do not add this 5 m  (0.2 US fl oz., 0.2 Imp fl oz.) of lubricant when replacing the compressor only.

RJIA3578E

HA-32

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REFRIGERATION SYSTEM

REFRIGERATION SYSTEM

Inspection

INFOID:0000000005249900

1.

CHECK BLOWER MOTOR OPERATION

Check blower motor operation. Refer to 

HAC-80, "Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the parts according to the inspection results.

2.

CHECK COMPRESSOR OPERATION

Check compressor operation. Refer to 

HAC-84, "Component Function Check"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the parts according to the inspection results.

3.

CHECK REFRIGERANT CYCLE PRESSURE

Connect recovery/recycling recharging equipment to the vehicle and perform the diagnosis with the gauge
pressure. Refer to 

HA-8, "Trouble Diagnosis For Unusual Pressure"

.

Is the inspection result normal?

YES

>> Perform the performance test. Refer to 

HA-32, "Performance Chart"

.

NO

>> Repair or replace the parts according to the inspection results.

Performance Chart

INFOID:0000000005249901

TEST CONDITION

Testing must be performed as per the following:

TEST READING

Recirculating-to-discharge Air Temperature Table

Vehicle condition

Indoors or in the shade (in a well-ventilated place)

Doors

Closed

Door windows

Open

Hood

Open

Temperature control switch or dial

Max. COLD

Mode switch

 (Ventilation) set

Intake switch

 (Recirculation) set

 Fan (blower) speed

Max. speed set

Engine speed

Idle speed

Operate the air conditioning system for 10 minutes before taking measurements.

Inside air (Recirculating air) at blower assembly inlet

Discharge air temperature at center ventilator

°

C (

°

F)

Relative humidity

%

Air temperature

°

C (

°

F)

50 - 60

20 (68)

5.1 – 7.1 (41 – 45)

25 (77)

8.4 – 10.9 (47 – 52)

30 (86)

14.5 – 17.5 (58 – 64)

60 - 70

20 (68)

7.1 – 9.1 (45 – 48)

25 (77)

10.9 – 13.4 (52 – 56)

30 (86)

17.5 – 20.5 (64 – 69)

 

 

 

 

 

 

 

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