Nissan X-Trail 32. Manual — part 1364

LUBRICANT

HA-115

< BASIC INSPECTION >

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4.

Install compressor and check the operation.

Specified torque

: 30 N·m (3.1 kg-m, 22 ft-lb)

HA-116

< BASIC INSPECTION >

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PERFORMANCE TEST

PERFORMANCE TEST

Inspection

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INSPECTION PROCEDURE

1.

Connect recovery/recycling/recharging equipment (for HFC-134a) or manifold gauge.

2.

Start the engine, and set to the following condition.

Test condition

3.

Maintain test condition until A/C system becomes stable. (Approximately 10 minutes)

4.

Check that test results of “recirculating-to-discharge air temperature” and “ambient air temperature-to-
operating pressure” are within the specified value.

5.

When test results are within the specified value, inspection is complete.
If any of test result is out of the specified value, perform diagnosis by gauge pressure. Refer to

HA-118,

"Symptom Table"

.

RECIRCULATING-TO-DISCHARGE AIR TEMPERATURE TABLE

AMBIENT AIR TEMPERATURE-TO-OPERATING PRESSURE TABLE

Surrounding condition

Indoors or in the shade (in a well-ventilated place)

Vehicle condition

Door

Closed

Door glass

Full open

Hood

Open

Engine speed

Idle speed

A/C condition

Temperature control switch or dial

Full cold

A/C switch

ON

Air outlet

VENT (ventilation)

Intake door position

Recirculation

Fan (blower) speed

Maximum speed set

Inside air (Recirculating air) at blower assembly inlet

Discharge air temperature from center ventilator

°

C (

°

F)

Relative humidity

%

Air temperature

°

C (

°

F)

50 – 60

20 (68)

4.9 – 6.9 (41 – 44)

25 (77)

9.1 – 11.6 (48 – 53)

30 (86)

13.2 – 16.2 (56 – 61)

35 (95)

17.6 – 21.1 (64 – 70)

60 – 70

20 (68)

6.9 – 8.9 (44 – 48)

25 (77)

11.6 – 14.1 (53 – 57)

30 (86)

16.2 – 19.2 (61 – 66)

35 (95)

21.1 – 24.6 (70 – 76)

PERFORMANCE TEST

HA-117

< BASIC INSPECTION >

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Fresh air

High-pressure (Discharge side)

kPa (bar, kg/cm

2

, psi)

Low-pressure (Suction side)

kPa (bar, kg/cm

2

, psi)

Relative humidity

%

Air temperature

°

C (

°

F)

50 – 70

25 (77)

926 – 1,133

(9.3 – 11.3, 9.5 – 11.6, 134.3 –

164.2)

196 – 240

(2.0 – 2.4, 2.0 – 2.5, 28.4 – 34.8)

30 (86)

1,070 -– 1,308

(10.7 – 13.1, 10.9 – 13.3, 155.1 –

189.6)

233 – 285

(2.3 – 2.9, 2.4 – 2.9, 33.8 – 41.3)

35 (95)

1,091 – 1,332

(10.9 – 13.3, 11.1 – 13.6, 158.1 –

193.2)

278 – 340

(2.8 – 3.4, 2.8 – 3.5, 40.3 – 49.2)

40 (104)

1,292 – 1,579

(12.9 – 15.8, 13.2 – 16.1, 187.3 –

228.9)

333 – 407

(3.3 – 4.1, 3.4 – 4.2, 48.3 – 59.0)

HA-118

< SYMPTOM DIAGNOSIS >

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REFRIGERATION SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

REFRIGERATION SYSTEM SYMPTOMS

Trouble Diagnosis For Unusual Pressure

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Diagnose using a manifold gauge whenever system’s high and/or low side pressure(s) is/are unusual. The
marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to
above table (Ambient air temperature-to-operating pressure table) since the standard (usual) pressure, how-
ever, differs from vehicle to vehicle.

Symptom Table

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Gauge indication

Refrigerant cycle

Probable cause

Corrective action

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

The pressure returns to nor-
mal soon after sprinkling wa-
ter on condenser.

Overfilled refrigerant.

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

Air flow to condenser is insuf-
ficient.

Insufficient condenser cooling
performance.
• Poor fan rotation of radiator

and condenser.

• Improper installation of air

guide.

• Clogged or dirty condenser

fins.

• Repair or replace malfunc-

tioning parts.

• Clean and repair condenser

fins.

When compressor is stopped,
a high-pressure reading
quickly drops by approximate-
ly 196 kPa (1.96 bar, 2 kg/

cm

2

, 28 psi). It then gradually

decreases.

Air mixed in refrigerant cycle.

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

• Low-pressure pipe is cooler

than the outlet of evapora-
tor.

• Low-pressure pipe is frost-

ed.

Expansion valve opened too
much (excessive flow of refrig-
erant).

Replace expansion valve.

High-pressure side is excessively
high and low-pressure side is too
low.

High-pressure pipe and upper
side of condenser become
hot, however, liquid tank does
not become so hot.

Clogged or crushed high-pres-
sure pipe located between
compressor and condenser.

Repair or replace the malfunc-
tioning parts.

High-pressure side is too low and
low-pressure side is too high.

• The readings of both sides

become equal soon after
compressor operation
stops.

• There is no temperature dif-

ference between high- and
low-pressure sides.

Malfunction in compressor sys-
tem (insufficient compressor
pressure operation).
• Damage or breakage of

valve.

• Malfunctioning gaskets.

Replace compressor.

AC359A

AC360A

AC356A