Infiniti Q45. Manual - part 107

LUBRICANT

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LUBRICANT

PFP:KLG00

Maintenance of Lubricant Quantity in Compressor

NJS0007Y

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.
If lubricant quantity is not maintained properly, the following malfunctions may result:

●

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 properly.

●

There is no evidence of a large amount of lubricant leakage.

CAUTION:

If excessive lubricant leakage is noted, never perform the lubricant return operation.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS

1.

Start engine, and set the following conditions:

–

Engine speed: Idling to 1,200 rpm

–

A/C or AUTO switch: ON

–

Blower speed: Max. position

–

Temp. control: Optional [Set so that intake air temperature is 25 to 30

°

C (77 to 86

°

F).]

–

Intake position: Recirculation (REC)

2.

Perform lubricant return operation for about 10 minutes.

3.

Stop engine.

>> GO TO 3.

3. 

CHECK REPLACEMENT PART

Should the compressor be replaced?

YES

>> GO TO 

ATC-24, "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-

MENT"

 .

NO

>> GO TO 

ATC-24, "LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACE-

MENT EXCEPT COMPRESSOR"

 .

Name

: Nissan A/C System Oil Type S

ATC-24

LUBRICANT

LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COM-
PRESSOR

After replacing any of the following major components, add the correct amount of lubricant to the system.
Amount of lubricant to be added

*1: If refrigerant leak is small, no addition of lubricant is needed.

LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT 

1.

Before connecting recovery/recycling recharging equipment to vehicle, check recovery/recycling recharg-
ing equipment gauges. No refrigerant pressure should be displayed. If NG, recover refrigerant from equip-
ment lines.

2.

Connect recovery/recycling recharging equipment to vehicle. Confirm refrigerant purity in supply tank
using recovery/recycling recharging equipment and refrigerant identifier. If NG, refer to 

ATC-6, "CONTAM-

INATED REFRIGERANT"

 .

3.

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

ATC-6, "CONTAMINATED REFRIGERANT"

 .

4.

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

If the liquid tank also needs to be replaced, add another 5 m  (0.2 US fl oz, 0.2 Imp fl oz) of lubricant at
this time.
Do not add this 5 m  (0.2 US fl oz, 0.2 Imp fl oz) of lubricant only when replaces the compressor.

Part replaced

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)

—

Liquid tank

10 (0.3, 0.4)

—

In case of refrigerant leak

30 (1.0, 1.1)

Large leak

—

Small leak 

*1

LUBRICANT

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ATC

RJIA3578E

ATC-26

AIR CONDITIONER CONTROL

AIR CONDITIONER CONTROL

PFP:27500

Description of Air Conditioner LAN Control System

NJS0007Z

The LAN (Local Area Network) system consists of auto amp., mode door motor, air mix door motor and intake
door motor.
A configuration of these components is shown in the figure below.

System Construction

NJS00080

A small network is constructed among the auto amp., air mix door motor, mode door motor and intake door
motor. The auto amp. and motors are connected by data transmission lines and motor power supply lines. The
LAN network is built through the ground circuits of each door motor.
Addresses, motor opening angle signals, motor stop signals and error checking messages are all transmitted
through the data transmission lines connecting the auto amp. and each door motor.
The following functions are contained in LCUs built into the air mix door motor, mode door motor and intake
door motor.

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Address

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Motor opening angle signals

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Data transmission

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Motor stop and drive decision

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Opening angle sensor (PBR function)

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Comparison

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Decision (Auto amp. indicated value and motor opening angle comparison)

RHA439GA

RJIA0200E