Page 2425 of 2896

PREPARATION
MTC-13
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MTC
Revision: June 20062007 Versa
KV991J0130
(ACR2005-NI)
ACR5 A/C Service CenterRefrigerant recovery, recycling and re-
charging
—
(J-41995)
Electronic refrigerant leak detectorChecking for refrigerant leaks
Power supply: DC 12V (battery termi-
nal)
—
(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220)
UV lamp and UV safety goggles
(J-41459)
Refrigerant dye injector
(J-41447)
Quantity 24, 1/4 ounce bottles of
HFC-134a (R-134a) fluorescent
leak detection dye
(J-43872)
Refrigerant dye cleanerLeak detection dye
Power supply: DC 12V (battery termi-
nal)
—
(J-42220)
Fluorescent dye leak detectorChecking for refrigerant leaks when flu-
orescent dye is installed in A/C system.
Includes: UV lamp and UV safety gog-
gles
Power supply: DC 12V (battery termi-
nal)
—
(J-41447)
HFC-134a (R-134a) fluorescent
leak detection dye
(Box of 24, 1/4 ounce bottles)Application: For HFC-134a (R-134a)
PAG oil
Container: 1/4 ounce (7.4cc) bottle
(Includes self-adhesive dye identifica-
tion labels for affixing to vehicle after
charging system with dye.)
—
(J-41459)
HFC-134a (R-134a) Dye injector
Use with (J-41447) 1/4 ounce bot-
tlesFor injecting 1/4 ounce of fluorescent
leak detection dye into A/C system. Tool number
(Kent-Moore No.)
Tool nameDescription
WJIA0293E
AHA2 81 A
ZHA2 00 H
SHA438F
SHA439F
SHA440F
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MTC-14
PREPARATION
Revision: June 20062007 Versa
—
(J-43872)
Refrigerant dye cleanerFor cleaning dye spills.
—
(J-39183-C)
Manifold gauge set (with hoses
and couplers)Identification:
The gauge face indicates R-134a.
Fitting size: Thread size
1/2”-16 ACME
Service hoses:
(J-39500-72B)
High side hose
(J-39500-72R)
Low side hose
(J-39500-72Y)
Utility hoseHose colors:
Low side hose: Blue with black stripe
High side hose: Red with black stripe
Utility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:
1/2”-16 ACME
Service couplers:
(J-39500-20A)
High side coupler
(J-39500-24A)
Low side couplerHose fitting to service hose:
M14 x 1.5 fitting is optional or perma-
nently attached.
—
(J-39699)
Refrigerant weight scaleFor measuring of refrigerant
Fitting size - thread size:
1/2” - 16 ACME
—
(J-39649)
Vacuum pump
(Including the isolator valve)Capacity:
Air displacement: 4 CFM
Micron rating: 20 microns
Oil capacity: 482 g (17 oz)
Fitting size: Thread size
1/2”-16 ACME Tool number
(Kent-Moore No.)
Tool nameDescription
SHA441F
RJIA0196E
S-NT201
S-NT202
S-NT200
S-NT203
Page 2427 of 2896
PREPARATION
MTC-15
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MTC
Revision: June 20062007 Versa
Commercial Service ToolsEJS00590
(Kent-Moore No.)
Tool nameDescription
(J-41810-NI)
Refrigerant identifier equipment (R-
134a)For checking refrigerant purity and
system contamination
Power toolLoosening bolts and nuts
(J-44614)
Clutch disc holding toolClutch disc holding tool
RJIA0197E
PBIC0190E
WHA230
Page 2428 of 2896

MTC-16
REFRIGERATION SYSTEM
Revision: June 20062007 Versa
REFRIGERATION SYSTEMPFP:KA990
Refrigerant CycleEJS00576
REFRIGERANT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank,
through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator is
controlled by an externally equalized expansion valve, located inside the evaporator case.
FREEZE PROTECTION
Under usual operating conditions, when the A/C is switched ON, the compressor runs continuously, and the
evaporator pressure, and temperature is controlled by the compressor to prevent freeze up.
Refrigerant System ProtectionEJS00577
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 2,746 kPa (27.46 bar, 28.0 kg/cm
2 , 398 psi), or below
about 134 kPa (1.34 bar, 1.4 kg/cm
2 , 20 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 3.8 MPa (38 bar,
38.76 kg/cm
2 , 551 psi)], the release port on the pressure relief valve automatically opens and releases refrig-
erant into the atmosphere.
RJIA0849E
Page 2429 of 2896
REFRIGERATION SYSTEM
MTC-17
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MTC
Revision: June 20062007 Versa
Component LayoutEJS00578
SJIA0698E
Page 2430 of 2896

MTC-18
OIL
Revision: June 20062007 Versa
OILPFP:KLG00
Maintenance of Oil Quantity in CompressorEJS00579
The oil in the compressor circulates through the system with the refrigerant. Add oil to compressor when
replacing any component or after a large refrigerant leakage occurred. It is important to maintain the specified
amount.
If oil quantity is not maintained properly, the following malfunctions may result:
Lack of oil: May lead to a seized compressor.
Excessive oil: Inadequate cooling (thermal exchange interference)
OIL
OIL RETURN OPERATION
Adjust the oil quantity according to the test group shown below.
1. CHECK OIL RETURN OPERATION
Can oil return operation be performed?
A/C system works properly.
There is no evidence of a large amount of oil leakage.
CAUTION:
If excessive oil leakage is noted, do not perform the oil return operation.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. PERFORM OIL RETURN OPERATION, PROCEEDING AS FOLLOWS
1. Start engine, and set the following conditions:
–Engine speed: Idling to 1,200 rpm
–A/C blower switch: ON
–Blower speed: Max. position
–Temp. control: Optional [Set so that intake air temperature is 25° to 30°C (77° to 86° F)].
–Intake position: Recirculation (REC)
2. Perform oil return operation for about 10 minutes.
3. Stop engine.
>> GO TO 3.
3. CHECK REPLACEMENT PART
Should the compressor be replaced?
YES >> GO TO MTC-19, "OIL ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT" .
NO >> GO TO MTC-19, "
OIL ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT
EXCEPT COMPRESSOR" . TYPE 1 Compressor (CR-10) : NISSAN A/C System Oil Type R
TYPE 2 Compressor (CSV511) : NISSAN A/C System Oil Type S
Page 2431 of 2896

OIL
MTC-19
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MTC
Revision: June 20062007 Versa
OIL ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COMPRESSOR
After replacing any of the following major components, add the correct amount of oil to the system.
Amount Of Oil To Be Added
*1: If refrigerant leak is small, no addition of oil is needed.
OIL ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT
1. Before connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges.
No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.
Part replacedOil to be added to system
Remarks
Amount of oil
m (US fl oz, Imp fl oz)
Evaporator 35 (1.2, 1.2) -
Condenser 15 (0.5, 0.5) -
Liquid tank 5 (0.2, 0.2) -
In case of refrigerant leak30 (1.0, 1.1) Large leak
None *1
Small leak
*1
1. New compressor 2. Old compressor 3. Recovery/recycling equipment
4. Measuring cup X 5. Measuring cup Y 6. New oil
A. Drain oil from the new compressor
into clean containerB. Record amount of oil recovered C.
Add an additional 5 m (0.2 US fl oz,
0.2 Imp fl oz) of new oil when replac-
ing liquid tank
D. Install new oil equal to recorded
amounts in measuring cups X plus Y
WJIA1716E
Page 2432 of 2896
MTC-20
OIL
Revision: June 20062007 Versa
2. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure oil discharged into the
recovery/recycling equipment.
3. Drain the oil from the old (removed) compressor into a graduated container and recover the amount of oil
drained.
4. Drain the oil from the new compressor into a separate, clean container.
5. Measure an amount of new oil installed equal to amount drained from old compressor. Add this oil to new
compressor through the suction port opening.
6. Measure an amount of new oil equal to the amount recovered during discharging. Add this oil to new com-
pressor through the suction port opening.
7. If the liquid tank also needs to be replaced, add another 5 m (0.2 US fl oz, 0.2 Imp fl oz.) of oil at this
time.
Add this 5 m (0.2 US fl oz, 0.2 Imp fl oz.) of oil only when replacing the compressor.