Nissan Rogue. Manual — part 736
HA-12
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
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Component Description
INFOID:0000000011279474
1.
Condenser
2.
Compressor
3.
Refrigerant pressure sensor
4.
Liquid tank
5.
Expansion valve
6.
Evaporator
ALIIA0902ZZ
Component
Description
Compressor
Intakes, compresses and discharges refrigerant to circulate refrigerant inside the refrigerant system.
Condenser
Cools refrigerant discharged from compressor and transforms it to liquid refrigerant.
Liquid tank
Eliminates foreign matter in refrigerant and stores temporarily liquid refrigerant.
Refrigerant pressure sensor
Refer to
EC-485, "Component Function Check"
Expansion valve
Transforms high-pressure liquid refrigerant to mist from low-pressure liquid refrigerant.
Evaporator
The mist from liquid refrigerant transforms to gas by evaporation by the air conveyed from blower
motor. The air is cooled by the heat by evaporation.
SYSTEM
HA-13
< SYSTEM DESCRIPTION >
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SYSTEM
System Diagram
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System Description
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REFRIGERANT CYCLE
Refrigerant Flow
The refrigerant from the compressor flows through the condenser and liquid tank, 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 liquid tank. 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 to have the following conditions:
- Approximately 3,120 kPa (31.8 kg/cm
2
, 452 psi) or more (Engine speed is 1,500 rpm or more.)
- Approximately 2,740 kPa (27.9 kg/cm
2
, 397 psi) or more (Engine speed is less than 1,500 rpm.)
1.
Compressor
2.
Pressure relief valve
3.
Liquid tank
4.
Refrigerant pressure sensor
5.
Condenser
6.
Expansion valve
7.
Evaporator
8.
Blower motor
A.
High-pressure gas
B.
High-pressure liquid
C.
Low-pressure liquid
D.
Low-pressure gas
E.
Suction port
F.
Discharge port
G
Outside air
AWIIA0054ZZ
HA-14
< SYSTEM DESCRIPTION >
SYSTEM
- Approximately 120 kPa (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 (38.8 kg/
cm
2
, 551 psi)].
DIAGNOSIS AND REPAIR WORKFLOW
HA-15
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Workflow
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OVERALL SEQUENCE
DETAILED FLOW
1.
INTERVIEW CUSTOMER
Interview the customer to obtain as much information as possible about the conditions and environment under
which the malfunction occurred.
ALIIA0440GB
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