Nissan Qashqai (2007-2010). Manual — part 859

HA-6

HIGH-PRESSURE FLEXIBLE HOSE . . . ..

196

Exploded View . . . . . . . . . . . . . ...

196

Removal and Installation . . . . . . . . . ...

196

HIGH-PRESSURE PIPE 1 (ENGINE COM-
PARTMENT) . . . . . . . . . . . . .

198

Exploded View . . . . . . . . . . . . . ...

198

Removal and Installation . . . . . . . . . ...

198

LOW-PRESSURE PIPE 1 AND HIGH-PRES-
SURE PIPE 2 . . . . . . . . . . . . ...

200

Exploded View . . . . . . . . . . . . . ...

200

Removal and Installation . . . . . . . . . ...

200

CONDENSER . . . . . . . . . . . . ..

202

Exploded View . . . . . . . . . . . . . ...

202

Removal and Installation . . . . . . . . . ...

202

LIQUID TANK . . . . . . . . . . . . ..

204

Exploded View . . . . . . . . . . . . . ...

204

Removal and Installation . . . . . . . . . ...

204

REFRIGERANT PRESSURE SENSOR . . ...

205

Exploded View . . . . . . . . . . . . . ..

205

Removal and Installation . . . . . . . . . ...

205

EVAPORATOR . . . . . . . . . . . . .

206

Exploded View . . . . . . . . . . . . . ..

206

Removal and Installation . . . . . . . . . ...

206

EXPANSION VALVE . . . . . . . . . .

208

Exploded View . . . . . . . . . . . . . ..

208

Removal and Installation . . . . . . . . . ...

208

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . .

210

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . .

210

Compressor . . . . . . . . . . . . . . ..

210

Lubricant . . . . . . . . . . . . . . . ...

210

Refrigerant . . . . . . . . . . . . . . .

210

Engine Idling Speed . . . . . . . . . . . ..

210

Belt Tension . . . . . . . . . . . . . . ..

210

DIAGNOSIS AND REPAIR WORKFLOW

HA-7

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONER (HR/MR)]

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000001093748

DETAILED FLOW

1.

LISTEN TO CUSTOMER COMPLAINT

Listen to customer complaint. (Get detailed information about the conditions and environment when the symp-
tom occurs.)

>> GO TO 2.

2.

VERIFY THE SYMPTOM WITH OPERATIONAL CHECK

Verify the symptom with operational check. Refer to

HAC-6, "Description & Inspection"

.

>> GO TO 3.

3.

GO TO APPROPRIATE TROUBLE DIAGNOSIS

Go to appropriate trouble diagnosis (Refer to

HAC-108, "Diagnosis Chart By Symptom"

).

>> GO TO 4.

4.

REPAIR OR REPLACE

Repair or replace the specific parts

>> GO TO 5.

5.

FINAL CHECK

Final check.
Is the inspection result normal?

YES

>> CHECK OUT

NO

>> GO TO 3.

HA-8

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER (HR/MR)]

REFRIGERATION SYSTEM

FUNCTION DIAGNOSIS

REFRIGERATION SYSTEM

System Diagram

INFOID:0000000001093749

System Description

INFOID:0000000001093750

REFRIGERANT CYCLE

Refrigerant Flow

The refrigerant flows from the compressor, through the condenser with liquid tank, through the evaporator, and
back to the compressor. The refrigerant evaporation in the evaporator is controlled by an externally equalized
expansion valve, located inside the evaporator case.

Freeze Protection

To prevent evaporator frozen up, the evaporator air temperature is monitored, and the voltage signal to the
display and A/C auto amp. will make 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 sen-
sor, located on the condenser. If the system pressure rises above, or falls below the specifications, the refrig-
erant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM.
ECM makes the A/C relay go OFF and stops the compressor when pressure on the high-pressure side
detected by refrigerant pressure sensor is over about 3,119 kPa (31.8 kg/cm

2

, 452 psi), or below about 118

kPa (1.2 kg/cm

2

, 17 psi).

Pressure Relief Valve

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system increases to an unusual level [more than 3,628 kPa (37 kg/
cm

2

, 526 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into

the atmosphere.

LUBRICANT

RJIA1552E

REFRIGERATION SYSTEM

HA-9

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER (HR/MR)]

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Maintenance of Lubricant Quantity in Compressor

The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large refrigerant leakage occurred. It is important to maintain the
specified amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:
• Lack of lubricant: May lead to a seized compressor.
• Excessive lubricant: Inadequate cooling (thermal exchange interference)

Lubricant

Component Parts Location

INFOID:0000000001093751

Name

: Nissan A/C System Oil Type S

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Текст

Политика конфиденциальности