Nissan Maxima. Instruction — part 697
HA-14
< SYSTEM DESCRIPTION >
REFRIGERATION SYSTEM
SYSTEM DESCRIPTION
REFRIGERATION SYSTEM
Refrigerant Cycle
INFOID:0000000009465923
Refrigerant flow
The refrigerant from the compressor flows through the condenser with liquid tank, the evaporator and returns
to the compressor. The refrigerant evaporation in the evaporator is controlled by an expansion valve.
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
REFRIGERATION SYSTEM
HA-15
< SYSTEM DESCRIPTION >
C
D
E
F
G
H
J
K
L
M
A
B
HA
N
O
P
Component Part Location
INFOID:0000000009465924
Refrigerant System Protection
INFOID:0000000009465925
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 refriger-
ant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM.
The ECM then ceases to supply power to the A/C relay which disengages and stops the compressor when
pressure on the high pressure side (as detected by refrigerant pressure sensor) is over approximately 2,746
kPa (28 kg/cm
2
, 398 psi), or below approximately 120 kPa (1.22 kg/cm
2
, 17.4 psi).
Pressure Relief Valve
1.
Heater and cooling unit assembly
2.
High-pressure pipe
3.
High-pressure A/C service valve
4.
High-pressure flexible hose
5.
Air deflector (RH)
6.
Junction pipe
7.
Condenser
8.
Liquid tank
9.
Refrigerant pressure sensor
10. Condenser, liquid tank and refrig-
erant pressure sensor
11. Air deflector (LH)
12. Compressor
13. Low-pressure flexible hose
14. Low-pressure A/C service valve
15. Low-pressure pipe
A.
High-pressure pipe to heater and
cooling unit assembly
B.
High-pressure flexible hose to com-
pressor
C.
Low-pressure flexible hose to com-
pressor
AWIIA1616ZZ
HA-16
< SYSTEM DESCRIPTION >
REFRIGERATION SYSTEM
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 abnormal level [more than 3,727 kPa (38 kg/
cm
2
, 540 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into
the atmosphere.
DIAGNOSIS AND REPAIR WORK FLOW
HA-17
< BASIC INSPECTION >
C
D
E
F
G
H
J
K
L
M
A
B
HA
N
O
P
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
WITH COLOR DISPLAY
WITH COLOR DISPLAY : How to Perform Trouble Diagnosis For Quick And Accurate
Repair
INFOID:0000000009465926
WORK FLOW
1.
LISTEN TO CUSTOMER COMPLAINT
Interview the customer to obtain as much information as possible about the conditions and environment under
which the symptom occurs.
>> GO TO 2.
2.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.
CHECK FOR HVAC DTCS WITH CONSULT
Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC. Refer to
Are there any HVAC DTCs present?
YES
>> Go to HVAC DTC index. Refer to
NO
>> GO TO 4.
4.
CHECK FOR AUDIO DTCS WITH CONSULT
Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of MULTI AV. Refer to
(with-
out navigation) or
(with navigation).
Are there any audio DTCs present?
YES
>> Go to audio DTC index. Refer to
NO
>> GO TO 5.
5.
PERFORM OPERATIONAL CHECK
Verify the symptom with operational check based on the information obtained from the customer. Refer to
.
>> GO TO 6.
6.
GO TO APPROPRIATE TROUBLE DIAGNOSIS
Go to appropriate trouble diagnosis. Refer to
HA-21, "WITH COLOR DISPLAY : Symptom Matrix Chart"
NOTE:
If DTC is displayed, erase DTC after repairing or replacing malfunctioning parts.
Is the inspection result normal?
YES
>> Repair or replace malfunctioning parts.
NO
>> GO TO 7.
7.
FINAL CHECK
Check that the A/C system operates normally.
Is the inspection result normal?
YES
>> Inspection End
NO
>> GO TO 3.
WITH MONOCHROME DISPLAY
WITH MONOCHROME DISPLAY : How to Perform Trouble Diagnosis For Quick And
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст