Nissan X-Trail 32. Instruction — 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
.
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 >
[QR25DE]
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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 >
[QR25DE]
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
INFOID:0000000011006117
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
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