Nissan Versa Sedan. Instruction — part 482

REFRIGERATION SYSTEM SYMPTOMS

HA-27

< SYMPTOM DIAGNOSIS >

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Both high- and low-pressure sides
are too low.

• The area around evapora-

tor outlet does not become
cold.

• The area around evapora-

tor inlet becomes frosted.

Clogged expansion valve.
• Breakage of temperature

sensor.

• Clogging by foreign material.

Eliminate foreign material from
expansion valve, or replace it.

• There is a temperature dif-

ference between the areas
around outlet and inlet
pipes of liquid tank.

• Liquid tank becomes frost-

ed.

Malfunction in inner liquid tank
(clogged strainer).

Replace liquid tank.

Evaporator becomes frosted.

Clogged or crushed low-pres-
sure pipe.

Repair or replace malfunction-
ing parts.

Malfunction in intake sensor
(AUTOMATIC AIR CONDI-
TIONER) or thermo control
amp. (MANUAL AIR CONDI-
TIONER).

• Check thermo control amp.

system. Refer to

HAC-45,

"Diagnosis Procedure"

.

There is a small temperature
difference between the high
and low pressure pipes for re-
frigerant cycle.

• Shortage of refrigerant.
• Leakage of refrigerant.

• Check for leakage.
• Collect all refrigerant, evacu-

ate refrigerant cycle again,
and then refill it with the spec-
ified amount of refrigerant.

Low-pressure side sometimes be-
comes negative.

• Sometimes the area

around evaporator outlet
does not become cold.

• Sometimes the area

around evaporator inlet is
frosted.

• Icing caused by the mixing of

water in cooler cycle.

• Deteriorated dryer in liquid

tank.

• Collect all refrigerant.
• Evacuate refrigerant cycle

completely, and then refill it
with the specified amount of
refrigerant. At this time, al-
ways replace liquid tank.

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

AC353A

AC354A

HA-28

< SYMPTOM DIAGNOSIS >

NOISE

NOISE

Symptom Table

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Symptom

Noise source

Probable cause

Corrective action

Unusual noise from compressor
when A/C is ON.

Inside of compressor

Wear, breakage, or clogging of foreign
material in inner parts.

Check compressor oil. Re-
fer to

HA-29, "Inspection"

.

Magnet clutch

Contact of clutch disc with pulley.

Check clearance between
clutch disc and pulley. Refer
to

HA-29, "Inspection"

.

Compressor body

Loosened compressor bolts.

Check bolts for tightness.
Refer to

HA-29, "Exploded

View"

.

Unusual noise from cooler piping.

Cooler piping (pipe and
flexible hose)

Improper installation of clip and brack-
et.

Check the installation condi-
tion of the cooler piping. Re-
fer to

HA-29, "Exploded

View"

.

Unusual noise from expansion
valve when A/C is ON.

Expansion valve

Shortage of refrigerant.

• Check for leakage.
• Collect all refrigerant,

evacuate refrigerant cycle
again, and then refill it
with the specified amount
of refrigerant.

Wear, breakage, or clogging of foreign
material in inner parts.

Eliminate foreign material
from expansion valve, or re-
place it.

Unusual noise from belt.

—

Loosened belt.

Check belt tension. Refer to

EM-18, "Adjustment"

.

Internal compressor parts get locked.

Replace compressor.

COMPRESSOR

HA-29

< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

COMPRESSOR

Exploded View

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Removal and Installation

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CAUTION:

Perform oil return operation before each refrigeration system disassembly. However, if a large amount

of refrigerant or oil is detected, do not perform oil return operation. Refer to

HA-21, "Perform Oil

Return Operation"

.

REMOVAL

1. Use refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. Refer to

HA-19, "Recy-

cle Refrigerant"

.

2. Remove the high and low-pressure flexible hose bolts and disconnect low-pressure flexible hose and

high-pressure flexible hose from the compressor.

CAUTION:

Cap or wrap the joint of the A/C piping and compressor with suitable material such as vinyl tape to

avoid the entry of air.

3. Remove the engine under cover. Refer to

EXT-19, "Removal and Installation"

.

4. Remove drive belt. Refer to

EM-16, "Removal and Installation"

.

5. Disconnect the harness connector from the compressor (magnet clutch).
6. Remove compressor bolts and the compressor.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Do not reuse O-rings.

• Apply A/C oil to the O-rings of the low-pressure flexible hose and high-pressure flexible hose for

installation.

• Perform oil adjusting procedure before installing new compressor. Refer to

HA-21, "Oil Adjusting

Procedure for Components Replacement Except Compressor"

.

• After charging the A/C refrigerant, check for leaks. Refer to

HA-17, "Leak Test"

.

• Check tension of the drive belt after installing compressor. Refer to

EM-17, "Inspection"

.

Inspection

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CHECK DISC TO PULLEY CLEARANCE

AWIIA1456GB

1.

Compressor

HA-30

< REMOVAL AND INSTALLATION >

COMPRESSOR

Check the clearance (B) between pulley assembly (1) and clutch

disc (2) along the entire periphery with a feeler gauge (A).

If specified clearance is not obtained, replace adjusting spacer and

readjust.

Clearance

: Refer to

HA-44, "Compressor"

.

AWIIA1462ZZ