Nissan Cube. Manual - part 534

REFRIGERANT

HA-25

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2.

Operate recovery/recycling/recharging equipment, and evacuate air from A/C system for 25 minutes or
more.

CAUTION:

Evacuate air for 15 minutes or more if the parts are replaced.

3.

Check the airtightness of A/C system for 25 minutes or more. If pressure rises more than the specified
level, charge A/C system with approximately 200 g (0.4 lb) refrigerant and check that there is no refriger-
ant leakage. Refer to 

HA-22, "Leak Test"

.

CAUTION:

Check the airtightness for 15 minutes or more if the parts are replaced.

4.

If parts other than compressor are replaced, fill compressor lubricant according to parts that are replaced.

5.

Charge the specified amount of refrigerant to A/C system.

6.

Check that A/C system operates normally.

7.

Disconnect recovery/recycling/recharging equipment. (Collect the refrigerant from the high-pressure hose
and low-pressure hose of recovery/recycling/recharging equipment.)

8.

Install A/C service valve cap.

9.

Refrigerant charge is complete.

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LUBRICANT

LUBRICANT

Description

INFOID:0000000009950342

MAINTENANCE OF LUBRICANT LEVEL

The compressor lubricant is circulating in the system together with the refrigerant. It is necessary to fill com-
pressor with lubricant when replacing A/C system parts or when a large amount of refrigerant leakage is
detected. It is important to always maintain lubricant level within the specified level. Otherwise, the following
conditions may occur.
• Insufficient lubricant amount: Stuck compressor
• Excessive lubricant amount: Insufficient cooling (caused by insufficient heat exchange)

Inspection

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If a compressor is malfunctioning (internal noise, insufficient cooling), check the compressor oil.

1.

COMPRESSOR OIL JUDGMENT

1.

Remove the compressor. Refer to 

HA-31, "Exploded View"

.

2.

Sample a compressor oil and judge on the figure.

Judgement result 1>>Replace compressor only.
Judgement result 2>>Replace compressor and liquid tank.

Perform Lubricant Return Operation

INFOID:0000000009950344

CAUTION:

If a large amount of refrigerant or lubricant leakage is detected, never perform lubricant return opera-
tion.

1.

Start the engine and set to the following conditions.
• Engine speed: Idling to 1,200 rpm
• A/C switch: ON
• Fan speed: Maximum speed set
• Intake door position: Recirculation
• Temperature setting: Full cold

2.

Perform lubricant return operation for approximately 10 minutes.

3.

Stop the engine.

4.

Lubricant return operation is complete.

Lubricant Adjusting Procedure for Components Replacement Except Compressor

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Fill with lubricant for the amount that is calculated according to the following conditions.
Example: Lubricant amount to be added when replacing evaporator and liquid tank [m  (US fl oz., Imp fl oz.)]
= 35 (1.2, 1.2) + 5 (0.2, 0.2) + 

α

Name

: A/C System Oil Type R

JSIIA0927GB

LUBRICANT

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Lubricant Adjusting Procedure for Compressor Replacement

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1.

Drain lubricant from removed compressor and measure lubricant amount.
1.

Drain lubricant from high-pressure port (A) and low-pres-
sure port (B) while rotating magnet clutch.

2.

Measure total amount of lubricant that is drained from
removed compressor.

2.

Drain lubricant from a new compressor that is calculated accord-
ing to the following conditions.

CAUTION:

If lubricant amount that is drained from removed compressor is less than 60 m  (2.0 US fl oz., 2.1
Imp fl oz.), perform calculation by setting “D” as 40 m  (1.4 US fl oz., 1.4 Imp fl oz.).

Example: Lubricant amount to be drained from a new compressor when replacing compressor and liquid
tank [m  (US fl oz., Imp fl oz.)] [D = 60 (2.0, 2.1), 

α

 = 5 (0.2, 0.2)]

120 (4.1, 4.2) 

−

 [60 (1.5, 1.6) + 20 (0.7, 0.7) + 5 (0.2, 0.2) + 5 (0.2, 0.2)] = 30 (1.0, 1.0)

Conditions

Lubricant amount to be added to A/C system

m

 (US fl oz., Imp fl oz.)

Replace evaporator

35 (1.2, 1.2) 

Replace condenser

15 (0.5, 0.5)

Replace liquid tank

5 (0.2, 0.2)

Refrigerant leakage is detected

Large amount leakage

30 (1.0, 1.1)

Small amount leakage

—

Lubricant amount that is recycled together with refrigerant during recycle operation

α

JMIIA0940ZZ

Amount to be drained (A) [m  (US fl oz., Imp fl oz.)] 
= F 

−

 (D + S + R + 

α

)

F

: Lubricant amount that a new compressor 
contains [120 (4.1, 4.2)]

D

: Lubricant amount that is drained from re-
moved compressor

S

: Lubricant amount that remains inside of re-
moved compressor [20 (0.7, 0.7)]

R

: Lubricant amount to be added according to 
components that are removed except com-
pressor

α

: Lubricant amount that is recycled together 
with refrigerant during recycle operation

Conditions

Lubricant amount to be added to A/C system

m

 (US fl oz., Imp fl oz.)

Replace evaporator

35 (1.2, 1.2)

Replace condenser

15 (0.5, 0.5)

Replace liquid tank

5 (0.2, 0.2)

JPIIA1455GB

HA-28

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LUBRICANT

3.

Install compressor and check the operation.