Nissan X-Trail 32. Manual — part 1342
REFRIGERATION SYSTEM SYMPTOMS
HA-27
< SYMPTOM DIAGNOSIS >
[R9M (EXCEPT FOR RUSSIA)]
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SYMPTOM DIAGNOSIS
REFRIGERATION SYSTEM SYMPTOMS
Trouble Diagnosis For Unusual Pressure
INFOID:0000000010999984
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:0000000010999985
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 (1.96bar, 2 kg/cm
2
,
28 psi). It then gradually de-
creases.
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
HA-28
< SYMPTOM DIAGNOSIS >
[R9M (EXCEPT FOR RUSSIA)]
REFRIGERATION SYSTEM SYMPTOMS
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 condenser & liquid
tank assembly.
Evaporator becomes frosted.
Clogged or crushed low-pres-
sure pipe.
Repair or replace malfunction-
ing parts.
Malfunction in intake sensor.
Check intake sensor system.
Refer to
(AUTOMATIC AIR
CONDITIONING SYSTEM) or
HAC-192, "Diagnosis Proce-
dure"
(MANUAL AIR CONDI-
TIONING SYSTEM).
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 condenser &
liquid tank assembly.
Hunting in high-pressure side.
There is no temperature dif-
ference between high- and
low-pressure sides.
Malfunctioning variable valve
in compressor.
• Replace compressor.
• Check ECV system. Refer to
HAC-113, "Diagnosis Proce-
dure"
(AUTOMATIC AIR
CONDITIONING SYSTEM),
HAC-212, "Diagnosis Proce-
dure"
TIONING SYSTEM).
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
AC353A
AC354A
NOISE
HA-29
< SYMPTOM DIAGNOSIS >
[R9M (EXCEPT FOR RUSSIA)]
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NOISE
Symptom Table
INFOID:0000000010999986
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
.
Magnet clutch
Contact of clutch disc with pulley.
Check clearance between
clutch disc and pulley. Refer
to
Compressor body
Loosened compressor mounting bolts.
Check bolts for tightness.
Refer to
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
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
Internal compressor parts get locked
Replace compressor.
HA-30
< REMOVAL AND INSTALLATION >
[R9M (EXCEPT FOR RUSSIA)]
COMPRESSOR
REMOVAL AND INSTALLATION
COMPRESSOR
Exploded View
INFOID:0000000011000232
REMOVAL
Removal and Installation
INFOID:0000000011000233
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to
22, "Perform Lubricant Return Operation"
REMOVAL
1.
Use a refrigerant collecting equipment (for HFO-1234yf) to discharge the refrigerant. Refer to
.
2.
Remove alternator. Refer to
CHG-26, "R9M : Removal and Installation"
3.
Remove mounting bolt
, and then disconnect low-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.
Compressor
: N·m (kg-m, ft-lb)
JMIIA3526GB
JMIIA3739ZZ
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