Nissan X-Trail 32. Manual - part 1350

 

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Nissan X-Trail 32. Manual - part 1350

 

 

PREPARATION

HA-59

< PREPARATION >

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Tool name

Description

HFC-134a (R-134a) refrigerant

Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size

• Large container 1/2

-16 ACME

ND-OIL8

Type: Polyalkylene glycol oil (PAG), 
ND-OIL8
Application:
HFC-134a (R-134a) swash plate com-
pressors

S-NT196

JMIIA1759ZZ

HA-60

< SYSTEM DESCRIPTION >

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COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000011000263

JMIIA3357ZZ

In the heater & cooling unit assembly

No.

Location

Function

Compressor

Intakes, compresses, and discharges refrigerant, to circulate refrigerant inside the refrigerant 
cycle.

Refrigerant pressure sensor

• AUTOMATIC AIR CONDITIONING: Refer to 

HAC-19, "Refrigerant Pressure Sensor"

.

• MANUAL AIR CONDITIONING: Refer to 

HAC-148, "Refrigerant Pressure Sensor"

.

Condenser (condenser & Liq-
uid tank)

Cools refrigerant discharged from compressor, and transforms it to liquid refrigerant.

Liquid tank (condenser & Liq-
uid tank)

Eliminates foreign matter in refrigerant, and stores temporarily liquid refrigerant. 

Expansion valve

Transforms high-pressure liquid refrigerant to mist form low-pressure liquid refrigerant by 
drawing function.

Evaporator

The mist form liquid refrigerant transforms to gas by evaporation by the air conveyed from 
blower motor. The air is cooled by the heat by evaporation.

SYSTEM

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< SYSTEM DESCRIPTION >

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SYSTEM

System Diagram

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System Description

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REFRIGERANT CYCLE

Refrigerant Flow

The refrigerant from the compressor, flows the condenser with liquid tank, the evaporator, and returns to the
compressor. The refrigerant evaporation in the evaporator is controlled by an expansion valve.

Freeze Protection

To prevent evaporator from freezing up, the evaporator air temperature is monitored, and the voltage signal to
the A/C auto amp. makes the A/C relay go OFF and stop the compressor.

REFRIGERANT SYSTEM PROTECTION

Refrigerant Pressure Sensor

• The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure

sensor, located on the condenser. The refrigerant pressure sensor detects the pressure inside the refrigerant
line and sends the voltage signal to the ECM if the system pressure rises above, or falls below the specifica-
tions. 

• ECM turns the A/C relay to OFF and stops the compressor when the high-pressure side detected by refriger-

ant pressure sensor is following conditions;

- Approximately 3,120 kPa (31.2 bar, 31.8 kg/cm

2

, 452 psi) or more (Engine speed is 1,500 rpm or more.)

- Approximately 2,740 kPa (27.4 bar, 27.9 kg/cm

2

, 397 psi) or more (Engine speed is less than 1,500 rpm.)

- Approximately 140 kPa (1.4 bar, 1.2 kg/cm

2

, 17 psi) or less

Pressure Relief Valve

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
The release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere
when the pressure of refrigerant in the system increases to an unusual level [more than 3,800 kPa (38.0 bar,
38.8 kg/cm

2

, 551 psi)].

JPIIA1671GB

HA-62

< BASIC INSPECTION >

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DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

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OVERALL SEQUENCE

DETAILED FLOW

1.

INTERVIEW FOR MALFUNCTION

Interview the symptom to the customer.

NNIIA0143GB

 

 

 

 

 

 

 

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