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Nissan Rogue. Manual - part 738

HA-20

< SYMPTOM DIAGNOSIS >

COMPRESSOR SYSTEM SYMPTOMS

COMPRESSOR SYSTEM SYMPTOMS

Symptom Table

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Follow the next table and perform trouble diagnosis if there is a compressor unit malfunction (internal noise,

insufficient cooling).

*1: First conduct inspection according to trouble diagnosis for each malfunction.

*2: Applicable to variable capacity compressor only.

Symptom

Inspection method

Check list

Result

Action

Noise from compressor unit
When A/C is ON.
(rattling or rolling sound)

Cooker system in-
ternal pressure

Check with manifold gauge

Both high- and low-
pressure sides are
high.

Recharge with proper
amount of refrigerant.

High/low-pressures
hunt.

Replace compressor
only.

Check compressor
oil condition.

Sample compressor oil and
judge.

Refer to the criteria
shown in compressor
lubricant.

Judgment result 1: Re-
place compressor only.

Judgment result 2: Re-
place compressor and
liquid tank.

Insufficient cooling

Compressor body

Check rotation of compressor.
If sized or stuck, sample com-
pressor oil and judge.

Cooler system inter-
nal pressure

Check with a manifold gauge.
Sample compressor oil and
judge if the difference between
high-pressure and low-pres-
sure is small or if they are al-
most the same.

Outlet air temperature rises
temporarily while driving.

—

Replace compressor
only.

JSIIA0927GB

REFRIGERANT

HA-21

< PERIODIC MAINTENANCE >

PERIODIC MAINTENANCE

REFRIGERANT

Description

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CONNECTION OF SERVICE TOOLS AND EQUIPMENT

Leak Test

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CHECK REFRIGERANT LEAKS USING ELECTRONIC LEAK DETECTOR

WARNING:

Do not check for refrigerant leaks while the engine is running.

CAUTION:

Be careful of the following items so that inaccurate checks or misidentifications are avoided.

• Do not allow refrigerant vapor, shop chemical vapors, cigarette smoke or others around the vehicle.

• Always check for refrigerant leaks in a low air flow environment so that refrigerant may not disperse

when leaks occur.

1. Stop the engine.
2. Connect recovery/recycling/recharging equipment or manifold gauge set to A/C service valve.
3. Check that A/C refrigerant pressure is 345 kPa (3.52 kg/cm

, 50 psi) or more when temperature is 16

°C

(61

°F) or more. When pressure is lower than the specified value, recycle refrigerant completely and fill

refrigerant to the specified level.

NOTE:
Leaks may not be detected if A/C refrigerant pressure is 345 kPa (3.52 kg/cm

, 50 psi) or less when tem-

perature is less than 16

°C (61°F).

4. Clean area where refrigerant leak check is performed and check for refrigerant leak along all surfaces of

pipe connections and A/C system components using electronic leak detector probe.

CAUTION:

• Continue checking when a leak is found. Always continue and complete checking along all pipe

connections and A/C system components for additional leaks.

• When a leak is detected, clean leak area using compressed air and check again.

Shut-off valve

A/C service valve

Recovery/recycling/recharging
equipment

Refrigerant container (HFC-134a)

Weight scale

Vacuum pump

Manifold gauge set

Preferred (best) method

Alternative method

For charging

JSIIA0239ZZ

HA-22

< PERIODIC MAINTENANCE >

REFRIGERANT

• When checking leaks of cooling unit inside, always clean inside of drain hose so that the probe

surface may not be exposed to water or dirt.

NOTE:

• Always check for leaks starting from high-pressure side and continue to low-pressure side.

• When checking for leaks of cooling unit inside, operate blower fan motor for 15 minutes or more at the

maximum fan speed while the engine is stopped, and then insert electrical leak detector probe into drain

hose and hold for 10 minutes or more.

• When disconnecting shut-off valve that is connected to A/C service valve, always evacuate remaining

refrigerant so that misidentification can be avoided.

5. Repair or replace parts where refrigerant leaks are detected.
6. Start the engine and set A/C control in the following conditions.

• A/C switch ON

• Air flow: VENT (ventilation)

• Intake door position: Recirculation

• Temperature setting: Full cold

• Fan (blower) 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 leak. Go to step 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 leak.

Recycle Refrigerant

INFOID:0000000011279483

WARNING:

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

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 or others because it generates poisonous

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

1. Perform oil return operation. Refer to

HA-24, "Perform Oil Return Operation"

. (If refrigerant or oil leak is

detected in a large amount, omit this step, and go to step 2.)

CAUTION:

Do not perform oil return operation if a large amount of refrigerant or oil leak 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 integrated to compressor oil, etc.
7. Refrigerant recycle operation is complete.

SHA839E

REFRIGERANT

HA-23

< PERIODIC MAINTENANCE >

Charge Refrigerant

INFOID:0000000011279484

WARNING:

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

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 my irritate eyes, nose, or throat.

• Do not allow HFC-134a to be exposed to an open flame or others 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:

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 raises more than the specified

level, charge A/C system with approximately 200g refrigerant and check that there is no refrigerant leak.

Refer to

HA-21, "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.

Content .. 736 737 738 739 ..