Nissan Sentra. Manual - part 533

HA-26

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OIL

Oil Adjusting Procedure for Compressor Replacement

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1. Before connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges.

No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.

2. Connect recovery/recycling equipment to vehicle. Confirm refrigerant purity in supply tank using recovery/

recycling equipment and refrigerant identifier. If NG, refer to 

HA-4, "Precautions For Refrigerant System

Service"

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3. Confirm refrigerant purity in vehicle A/C system using recovery/recycling equipment and refrigerant identi-

fier. If NG, refer to 

HA-4, "Precautions For Refrigerant System Service"

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4. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure oil discharged into the

recovery/recycling equipment.

Replace liquid tank

5 (0.2, 0.2)

Refrigerant leakage is detected

Large amount leakage

30 (1.0, 1.1)

Small amount leakage

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Oil amount that is recycled together with refrigerant during recycle operation

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Conditions

Oil amount to be added to A/C system

m  (US fl oz, Imp fl oz)

1.

New compressor

2.

Old compressor

3.

Recovery/recycling equipment

4.

Measuring cup X

5.

Measuring cup Y

6.

New oil

A.

Drain oil from the new compressor 
into clean container

B.

Record amount of oil recovered

C.

Add an additional 5 m  (0.2 US fl oz, 
0.2 Imp fl oz) of new oil when replacing 
liquid tank

D.

Install new oil equal to recorded 
amounts in measuring cups X plus Y 

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OIL

HA-27

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5. Drain the oil from the “old” (removed) compressor into a graduated container and recover the amount of

oil drained.

6. Drain the oil from the “new” compressor into a separate, clean container.
7. Measure an amount of new oil installed equal to amount drained from “old” compressor. Add this oil to

“new” compressor through the suction port opening.

8. Measure an amount of new oil equal to the amount recovered during discharging. Add this oil to “new”

compressor through the suction port opening.

9. If the liquid tank also needs to be replaced, add an additional 5 m  (0.2 US fl oz, 0.2 Imp fl oz) of oil at this

time.

CAUTION:

Do not add the 5 m  (0.2 US fl oz, 0.2 Imp fl oz) of oil if only replacing the compressor and not the

liquid tank.

HA-28

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PERFORMANCE TEST

PERFORMANCE TEST

Inspection

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INSPECTION PROCEDURE

1. Connect recovery/recycling/recharging equipment (for HFC-134a) or manifold gauge.
2. Start the engine, and set to the following condition.

Test condition

3. Maintain test condition until A/C system becomes stable. (Approximately 10 minutes)
4. Check that test results of “recirculating-to-discharge air temperature” and “ambient air temperature-to-

operating pressure” are within the specified value.

5. When test results are within the specified value, inspection is complete.

If any of test result is out of the specified value, perform diagnosis by gauge pressure. Refer to 

HA-18,

"Symptom Table"

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RECIRCULATING-TO-DISCHARGE AIR TEMPERATURE TABLE

AMBIENT AIR TEMPERATURE-TO-OPERATING PRESSURE TABLE

Surrounding condition

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

Vehicle condition

Door

Closed

Door glass

Full open

Hood

Open

Engine speed

Idle speed

A/C condition

Temperature control switch or dial

Full cold

A/C switch

ON

Air outlet

VENT (ventilation)

Intake door position

Recirculation

Fan (blower) speed

Maximum speed set

Inside air (Recirculating air) at blower assembly inlet

Discharge air temperature from center ventilator

°C (°F)

Relative humidity

%

Air temperature

°C (°F)

50 – 60

20 (68)

4.7 – 6.7 (40 – 44)

25 (77)

8.6 – 11.1 (47 – 52)

30 (86)

12.6 – 15.6 (55 – 60)

35 (95)

19.0 – 22.5 (66 – 73)

60 – 70

20 (68)

6.7 – 8.7 (44 – 48)

25 (77)

11.1 – 13.6 (52 – 56)

30 (86)

15.6 – 18.6 (60 – 65)

35 (95)

22.5 – 26.0 (73 – 79)

PERFORMANCE TEST

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Fresh air

High-pressure (Discharge side)

kPa (kg/cm

2

, psi)

Low-pressure (Suction side)

kPa (kg/cm

2

, psi)

Relative humidity

%

Air temperature

°C (°F)

50 – 70

25 (77)

909 – 1,112

(9.2 – 11.3, 131.8 – 161.2)

159 – 194

(1.6 – 2.0, 23.1 – 28.1)

30 (86)

1,073 -– 1,312

(10.9 – 13.4, 155.6 – 190.2)

211 – 259

(2.2 – 2.6, 30.6 – 37.6)

35 (95)

1,445 – 1,766

(14.7 – 18.0, 209.5 – 256.1)

247 – 300

(2.5 – 3.1, 35.8 – 43.5)

40 (104)

1,650 – 2,017

(16.8 – 20.6, 239.3 – 292.5)

290 – 355

(3.0 – 3.6, 42.1 – 51.5)