Nissan Qashqai J11. Manual — part 1058
HA-58
< PREPARATION >
[TYPE 2]
PREPARATION
Tool name
Description
HFO-1234yf (R-1234yf) refrigerant
Container color: Light blue
Container marking: HFO-1234yf (R-
1234yf)
Fitting size: Thread size
• Large container 1/2
″
-16 ACME
ND-OIL12
Type: Polyalkylene glycol oil (PAG)
Application:
HFO-1234yf (R-1234yf) swash plate
compressors
Capacity: 40 m
(1.4 Imp fl oz.)
S-NT196
JMIIA1759ZZ
COMPONENT PARTS
HA-59
< SYSTEM DESCRIPTION >
[TYPE 2]
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
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Component Description
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JMIIA3523ZZ
1.
Refrigerant pressure sensor
2.
Compressor
3.
Condenser
4.
Liquid tank
5.
Expansion valve
6.
Evaporator
A.
Built-in A/C unit assembly
Component
Description
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.
Condenser
Cools refrigerant discharged from compressor, and transforms it to liquid refrigerant.
Compressor
Intakes, compresses, and discharges refrigerant, to circulate refrigerant inside the refrigerant cycle.
Refrigerant pressure sensor
Refer to
HAC-19, "Refrigerant Pressure Sensor"
(AUTOMATIC AIR CONDITIONING SYSTEM) or
HAC-148, "Refrigerant Pressure Sensor"
(MANUAL AIR CINDITIONING SYSTEM).
Liquid 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.
HA-60
< SYSTEM DESCRIPTION >
[TYPE 2]
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
When intake sensor detects that evaporator surface temperature is 2
°
C (36
°
F) or less, A/C auto amp. (Auto-
matic air conditioning) or A/C amp. (Manual air conditioning) requests ECM to turn the compressor OFF, and
ECM makes A/C relay to OFF, and stops the compressor.
REFRIGERANT SYSTEM PROTECTION
Refrigerant Pressure Sensor
• The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure
sensor, installed at the high-pressure pipe 1. 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 specifications.
• 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 less than 1,500 rpm.)
- Approximately 2,740 kPa (27.4 bar, 27.9 kg/cm
2
, 397 psi) or more (Engine speed is 1,500 rpm or more.)
- Approximately 140 kPa (1.4 bar, 1.4 kg/cm
2
, 20 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 bar,
38.8 kg/cm
2
, 551 psi)].
JMIIA3115GB
DIAGNOSIS AND REPAIR WORKFLOW
HA-61
< BASIC INSPECTION >
[TYPE 2]
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow
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OVERALL SEQUENCE
DETAILED FLOW
1.
INTERVIEW FOR MALFUNCTION
Interview the symptom to the customer.
NNIIA0143GB
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