Nissan Versa Note. Manual — part 486
HA-14
< SYMPTOM DIAGNOSIS >
REFRIGERATION SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
REFRIGERATION SYSTEM SYMPTOMS
Trouble Diagnosis For Unusual Pressure
INFOID:0000000008968519
Diagnose using a manifold gauge set whenever refrigerant pressures are unusual. The marker above the
gauge scale in the following table indicates the standard (usual) pressure range. Refer to
.
Symptom Table
INFOID:0000000008968520
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.
Recover refrigerant, evacuate
system, and recharge with the
specified amount of refrigerant.
Refer to
.
Air flow to condenser is insuf-
ficient.
Insufficient condenser cooling
performance.
• Poor cooling fan rotation.
• Missing and/or improper in-
stallation of air guides.
• Clogged or dirty condenser
fins.
• Repair or replace malfunc-
tioning parts.
• Clean and/or repair condens-
er fins.
When compressor stops,
high-pressure gauge quickly
drops by approximately 196
kPa (2 kg/cm
2
, 28 psi), then
gradually decreases.
Air mixed with refrigerant.
Recover refrigerant, evacuate
system, and recharge with the
specified amount of refrigerant.
Refer to
.
• 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. Refer
to
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 stops.
• There is no temperature dif-
ference between high and
low-pressure sides.
Malfunctioning compressor (in-
sufficient compressor pressure
operation).
• Damaged or broken of inter-
nal components.
• Malfunctioning gaskets.
Replace compressor. Refer to
HA-25, "Removal and Installa-
tion"
.
AC359A
AC360A
AC356A
REFRIGERATION SYSTEM SYMPTOMS
HA-15
< SYMPTOM DIAGNOSIS >
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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 inside liquid tank
(clogged strainer).
Replace condenser (includes
liquid tank). Refer to
"CONDENSER : Removal and
Installation"
Evaporator becomes frosted.
Clogged or crushed low-pres-
sure pipe.
Repair or replace malfunction-
ing parts.
Malfunctioning thermo amp.
Check thermo amp. system.
Refer to
.
There is a small temperature
difference between the high
and low pressure pipes.
• Low refrigerant charge.
• Leak or leaks in A/C system.
• Recover refrigerant, evacu-
ate system, and recharge
with the specified amount of
refrigerant. Refer to
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 moisture
mixed with refrigerant.
• Deteriorated dryer material
in liquid tank.
Recover refrigerant then re-
place condenser (includes liq-
uid tank). Refer to
"CONDENSER : Removal and
Installation"
. Evacuate system
and recharge with the specified
amount of refrigerant. Refer to
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
AC353A
AC354A
HA-16
< SYMPTOM DIAGNOSIS >
NOISE
NOISE
Symptom Table
INFOID:0000000008968521
Symptom
Noise source
Probable cause
Corrective action
Unusual noise from compressor
when A/C is ON.
Inside of compressor
Worn, broken, or clogged internal com-
ponents.
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
Loose compressor mounting bolts.
Check torque of mounting
bolts. Refer to
.
Unusual noise from cooler piping.
Cooler piping (pipe and
flexible hose)
Loose or improper installation of clip
and bracket.
Check installation of cooler
piping. Refer to
.
Unusual noise from expansion
valve when A/C is ON.
Expansion valve
Low refrigerant charge.
• Check for leaks. Refer to
.
• Recover refrigerant,
evacuate system, and re-
charge with the specified
amount of refrigerant.
Worn, broken, or clogged internal com-
ponents.
Eliminate foreign material
from expansion valve, or re-
place it.
Unusual noise from belt.
—
Loose belt
Check belt tension. Refer to
Damaged or broken components in-
side compressor.
Replace compressor. Refer
to
.
REFRIGERANT
HA-17
< PERIODIC MAINTENANCE >
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PERIODIC MAINTENANCE
REFRIGERANT
Description
INFOID:0000000009460329
CONNECTION OF SERVICE TOOLS AND EQUIPMENT
Leak Test
INFOID:0000000009460330
CHECK REFRIGERANT LEAKS USING FLUORESCENT LEAK DETECTION DYE
1. Install a fender cover (1).
2. Wear UV safety goggles (2) provided with refrigerant dye leak detection kit.
3. Connect power cable (4) of UV lamp (6) to positive and negative terminals of the battery (3).
1.
Shut-off valve
2.
A/C service valve
3.
Recovery/recycling/recharging
equipment
4.
Refrigerant container (HFC-134a)
5.
Weight scale
6.
Vacuum pump
7.
Manifold gauge set
A.
Preferred (best) method
B.
Alternative method
C.
For charging
JSIIA0239ZZ
RJIA3815J
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