Infiniti FX35, FX50 (S51). Manual — part 1129
LUBRICANT
HA-29
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LUBRICANT
Maintenance of Lubricant Quantity
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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
.
Lubricant Adjusting Procedure for Components Replacement Except Compressor
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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 >
[VQ35HR]
LUBRICANT
*1: No addition of lubricant is needed if the refrigerant leakage is small.
Lubricant Adjusting Procedure for Compressor Replacement
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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
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
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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
.
NO
>> Repair or replace the parts according to the inspection results.
Performance Chart
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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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