Nissan X-Trail 32. Manual — part 1361
PREPARATION
HA-103
< PREPARATION >
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Sealant or/and Lubricant
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HFC-134a (R-134a) Service Tool and Equipment
• Never mix HFC-134a (R-134a) refrigerant and/or its specified lubricant with CFC-12 (R-12) refrigerant and/
or its lubricant.
• Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/
lubricant.
• Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles
refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid
mixed use of the refrigerants/lubricant.
• Never use adapters that convert one size fitting to another: refrigerant/lubricant contamination occurs and
compressor malfunction may result.
Manifold gauge set (with hos-
es and couplers)
Identification:
• The gauge face indicates HFC-134a (R-
134a).
Fitting size: Thread size
• 1/2
″
-16 ACME
Service hoses
• High-pressure side hose
• Low-pressure side hose
• Utility hose
Hose color:
• Low-pressure side hose: Blue with black
stripe
• High-pressure 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
• High-pressure side coupler
• Low-pressure side coupler
Hose fitting to service hose:
M14 x 1.5 fitting is optional or permanently
attached.
Refrigerant weight scale
For measuring of refrigerant
Fitting size: Thread size
1/2
″
-16 ACME
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 name
Description
RJIA0196E
S-NT201
S-NT202
S-NT200
S-NT203
HA-104
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PREPARATION
Tool name
Description
HFC-134a (R-134a) refrigerant
Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size
• Large container 1/2
″
-16 ACME
ND-OIL8
Type: Polyalkylene glycol oil (PAG),
ND-OIL8
Application:
HFC-134a (R-134a) swash plate com-
pressors
S-NT196
JMIIA1759ZZ
COMPONENT PARTS
HA-105
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
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JMIIA3357ZZ
In the heater & cooling unit assembly
No.
Location
Function
Compressor
Intakes, compresses, and discharges refrigerant, to circulate refrigerant inside the refrigerant
cycle.
Refrigerant pressure sensor
• AUTOMATIC AIR CONDITIONING: Refer to
HAC-19, "Refrigerant Pressure Sensor"
.
• MANUAL AIR CONDITIONING: Refer to
HAC-148, "Refrigerant Pressure Sensor"
Condenser (condenser & Liq-
uid tank)
Cools refrigerant discharged from compressor, and transforms it to liquid refrigerant.
Liquid tank (condenser & Liq-
uid tank)
Eliminates foreign matter in refrigerant, and stores temporarily liquid refrigerant.
Expansion valve
Transforms high-pressure liquid refrigerant to mist form low-pressure liquid refrigerant by
drawing function.
Evaporator
The mist form liquid refrigerant transforms to gas by evaporation by the air conveyed from
blower motor. The air is cooled by the heat by evaporation.
HA-106
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SYSTEM
SYSTEM
System Diagram
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System Description
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REFRIGERANT CYCLE
Refrigerant Flow
The refrigerant from the compressor, flows the condenser with liquid tank, the evaporator, and returns to the
compressor. The refrigerant evaporation in the evaporator is controlled by an expansion valve.
Freeze Protection
To prevent evaporator from freezing up, the evaporator air temperature is monitored, and the voltage signal to
the A/C auto amp. makes the A/C relay go OFF and stop the compressor.
REFRIGERANT SYSTEM PROTECTION
Refrigerant Pressure Sensor
• The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure
sensor, located on the condenser. The refrigerant pressure sensor detects the pressure inside the refrigerant
line and sends the voltage signal to the ECM if the system pressure rises above, or falls below the specifica-
tions.
• ECM turns the A/C relay to OFF and stops the compressor when the high-pressure side detected by refriger-
ant pressure sensor is following conditions;
- Approximately 3,120 kPa (31.2 bar, 31.8 kg/cm
2
, 452 psi) or more (Engine speed is 1,500 rpm or more.)
- Approximately 2,740 kPa (27.4 bar, 27.9 kg/cm
2
, 397 psi) or more (Engine speed is less than 1,500 rpm.)
- Approximately 140 kPa (1.4 bar, 1.2 kg/cm
2
, 17 psi) or less
Pressure Relief Valve
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
The release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere
when the pressure of refrigerant in the system increases to an unusual level [more than 3,800 kPa (38.0 bar,
38.8 kg/cm
2
, 551 psi)].
JPIIA1671GB
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