Nissan Versa Sedan. Manual - part 480

REFRIGERANT

HA-19

< BASIC INSPECTION >

• Temperature setting: Full cold

• Fan speed: Maximum speed set

7. Run the engine at approximately 1,500 rpm for 2 minutes or more.
8. Stop the engine. Check again for refrigerant leakage. GO TO 4.

WARNING:

Be careful not to get burned when the engine is hot.

NOTE:

• Start refrigerant leak check immediately after the engine is

stopped.

• When refrigerant circulation is stopped, pressure on the low-

pressure side rises gradually, and after this, pressure on the

high-pressure side falls gradually.

• The higher the pressure is, the easier it is to find the refriger-

ant leakage.

Recycle Refrigerant

INFOID:0000000009269739

WARNING:

• Always use HFC-134a for A/C refrigerant. If CFC-12 is accidentally charged, compressor will be dam-

aged due to insufficient lubrication.

• Always observe and follow precautions described on refrigerant container. Incorrect handling may

result in an explosion of refrigerant container, frostbite, or the loss of eyesight.

• Do not breathe A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose, or throat.

• Do not allow HFC-134a to be exposed to an open flame etc. because it generates poisonous gas

when in contact with high temperature objects. Keep workshop well ventilated.

1. Perform oil return operation. Refer to

HA-21, "Perform Oil Return Operation"

. (If refrigerant or oil leakage

is detected in a large amount, omit this step, and then GO TO 2.)

CAUTION:

Do not perform oil return operation if a large amount of refrigerant or oil leakage is detected.

2. Check gauge pressure readings of recovery/recycling/recharging equipment. When remaining pressure

exists, recycle refrigerant from high-pressure hose and low-pressure hose.

NOTE:

Follow manufacturer instructions for the handling or maintenance of the equipment. Do not fill the equip-

ment with non-specified refrigerant.

3. Remove A/C service valve cap from the vehicle.
4. Connect recovery/recycling/recharging equipment to A/C service valve.
5. Operate recovery/recycling/recharging equipment, and recycle refrigerant from the vehicle.
6. Evacuate air for 10 minutes or more to remove any remaining refrigerant mixed with compressor oil, etc.
7. Refrigerant recycle operation is complete.

Charge Refrigerant

INFOID:0000000009269740

WARNING:

• Always use HFC-134a for A/C refrigerant. If CFC-12 is accidentally charged, compressor will be dam-

aged due to insufficient lubrication.

• Always observe and follow precautions described on refrigerant container. Incorrect handling may

result in an explosion of refrigerant container, frostbite, or the loss of eyesight.

• Do not breathe A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose, or throat.

• Do not allow HFC-134a to be exposed to an open flame etc. because it generates poisonous gas

when in contact with high-temperature objects. Keep workshop well ventilated.

1. Connect recovery/recycling/recharging equipment to the A/C service valve.
2. Operate recovery/recycling/recharging equipment, and evacuate air from A/C system for 25 minutes or

more.

CAUTION:

SHA839E

HA-20

< BASIC INSPECTION >

REFRIGERANT

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-17, "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 oil 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.

OIL

HA-21

< BASIC INSPECTION >

OIL

Description

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MAINTENANCE OF OIL LEVEL

The compressor oil is circulating in the system together with the refrigerant. It is necessary to fill compressor

with oil when replacing A/C system parts or when a large amount of refrigerant leakage is detected. It is impor-

tant to always maintain oil level within the specified level. Otherwise, the following conditions may occur;

• Insufficient oil amount: Stuck compressor

• Excessive oil amount: Insufficient cooling (caused by insufficient heat exchange)

Inspection

INFOID:0000000009269742

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

COMPRESSOR OIL JUDGMENT

1. Remove the compressor. Refer to

HA-29, "Removal and Installation"

2. Sample compressor oil and judge based on the figure.

Judgement result 1>>Replace compressor only.

Judgement result 2>>Replace compressor and liquid tank.

Perform Oil Return Operation

INFOID:0000000009269743

CAUTION:

If a large amount of refrigerant or oil leakage is detected, do not perform oil return operation.
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 oil return operation for approximately 10 minutes.
3. Stop the engine.
4. Oil return operation is complete.

Oil Adjusting Procedure for Components Replacement Except Compressor

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

(0.2) +

TYPE

: Refer to

HA-44, "Oil"

JSIIA0927GB

Conditions

Oil amount to be added to A/C system

m (Imp fl oz.)

Replace evaporator

35 (1.2)

Replace condenser

15 (0.5)

HA-22

< BASIC INSPECTION >

OIL

Oil Adjusting Procedure for Compressor Replacement

INFOID:0000000009269745

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

1. Drain oil from high-pressure port (A) and low-pressure port

(B) while rotating magnet clutch.

2. Measure total amount of oil that is drained from removed compressor.

2. Drain oil from a new compressor that is calculated according to

the following conditions;

CAUTION:

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

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

α = 5 (0.2)]

120 (4.2)

− [60 (2.1) + 20 (0.7) + 5 (0.2) + 5 (0.2)] = 30 (1.1)

3. Install compressor and check the operation.

Replace liquid tank

5 (0.2)

Refrigerant leakage is detected

Large amount leakage

30 (1.1)

Small amount leakage

—

Oil amount that is recycled together with refrigerant during recycle operation

Conditions

Oil amount to be added to A/C system

m (Imp fl oz.)

ALIIA0484ZZ

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

− (D

+ S + R +

α)

: Oil amount that a new compressor contains
[120 (4.2)]

: Oil amount that is drained from removed
compressor

: Oil amount that remains inside of removed
compressor [20 (0.7)]

: Oil amount to be added according to compo-
nents that are removed except compressor

: Oil amount that is recycled together with re-
frigerant during recycle operation

Conditions

Oil amount to be added to A/C system

m (Imp fl oz.)

Replace evaporator

35 (1.2)

Replace condenser

15 (0.5)

Replace liquid tank

5 (0.2)

JPIIA1455GB

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