Nissan Qashqai (2007-2010). Manual — part 879

HA-86

< ON-VEHICLE MAINTENANCE >

[AUTOMATIC AIR CONDITIONER (K9K)]

ELECTRICAL LEAK DETECTOR

After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any
false readings by leak detector.
Cooling unit (Evaporator)
With engine OFF, turn blower fan on “High” for at least 15 seconds to dissipate any refrigerant trace in the
cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer’s recommended
procedure for actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water
or dirt that may be in the drain hose.

5.

If a leak detector detects a leak, verify at least once by blowing compressed air into area of suspected
leak, then repeat check as outlined above.

6.

Do not stop when one leak is found. Continue to check for additional leaks at all system components.
If no leaks are found, perform steps 7 - 10.

7.

Start the engine.

8.

Set the A/C control as follows;

a.

A/C switch: ON

b.

MODE door position: VENT (Ventilation)

c.

Intake door position: Recirculation

d.

Temperature setting: Max. cold

e.

Fan speed: High

9.

Run engine at 1,500 rpm for at least 2 minutes.

10. Stop the engine and perform leak check again following steps 4

through 6 above.
Refrigerant leaks should be checked immediately after stopping
the engine. Begin with the leak detector at the compressor. The
pressure on the high-pressure side will gradually drop after
refrigerant circulation stops and pressure on the low-pressure
side will gradually rise, as shown in the graph. Some leaks are
more easily detected when pressure is high.

11. Before connecting recovery/recycling recharging equipment to vehicle, check recovery/recycling recharg-

ing equipment gauges. No refrigerant pressure should be displayed. If pressure is displayed, recover
refrigerant from equipment lines and then check refrigerant purity.

12. Confirm refrigerant purity in supply tank using recovery/recycling recharging equipment and refrigerant

identifier.

13. Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrig-

erant identifier.

14. Discharge A/C system using approved refrigerant recovery equipment. Repair the leaking fitting or com-

ponent if necessary.

15. Evacuate and recharge A/C system and perform the leak test to confirm no refrigerant leaks.

16. Perform A/C performance test to ensure system works properly.

SHA839E

REFRIGERATION SYSTEM

HA-87

< ON-VEHICLE REPAIR >

[AUTOMATIC AIR CONDITIONER (K9K)]

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ON-VEHICLE REPAIR

REFRIGERATION SYSTEM

Exploded View

INFOID:0000000001093909

Refer to

HA-69, "Refrigerant Connection"

.

Inspection After Installation

INFOID:0000000001093910

SETTING OF SERVICE TOOLS AND EQUIPMENT

Discharging Refrigerant

WARNING:

Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Remove HFC-134a (R-134a) from A/C system using certified service equipment meeting
requirements of SAE J-2210 [HFC-134a (R-134a) recycling equipment] or J-2209 [HFC-134a (R-134a)
recovery equipment]. If accidental system discharge occurs, ventilate work area before resuming ser-
vice. Additional health and safety information may be obtained from refrigerant and lubricant manu-
facturers.

1.

Heater sealing

2.

Expansion valve

3.

Low pressure pipe 1 and high pres-
sure pipe 2 assembly

4.

Evaporator

5.

O-ring

6.

Connector pipe fixing bolt

7.

High pressure pipe 1

8.

Condenser assembly

9.

Fixing bolt

10. Compressor

11.

Heater & cooling unit assembly

12. Heater & blower unit assembly

13. Refrigerant pressure sensor

14. Liquid tank

15. Liquid tank fixing screw

16. Low pressure flexible hose

17. Fixing bolt

18. Pipes fixing clip

19. Low & high pressure pipe bracket

20. Liquid tank fixing bracket

21. High pressure flexible hose

22. Low pressure pipe 2

23. Low pressure pipe fixing clamp as-

sembly

24. Pipe mantening clip

E1KIA0063GB

HA-88

< ON-VEHICLE REPAIR >

[AUTOMATIC AIR CONDITIONER (K9K)]

REFRIGERATION SYSTEM

Evacuating System and Charging Refrigerant

1.

Shut-off valve

2.

A/C service valve

3.

Recovery/Recycling/Recharging
equipment

JSIIA0238ZZ

1.

Shut-off valve

2.

A/C service valve

3.

Recovery/Recycling/Recharging
equipment

4.

Refrigerant container (HFC-134a)

5.

Weight scale (J-39650)

6.

Vacuum pump (J-39649)

7.

Manifold gauge set (J-39183)

A.

Preferred (best) method

B.

Alternative method

C.

For charging

JSIIA0239ZZ

REFRIGERATION SYSTEM

HA-89

< ON-VEHICLE REPAIR >

[AUTOMATIC AIR CONDITIONER (K9K)]

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*1

HA-78, "Adjustment"

*2

“REFRIGERANT LEAKS” in

HA-81,

"Refrigerant Leaks"

.

*3

“CHECKING PROCEDURE” in

HA-

80, "Inspection"

.

*4

“PERFORMANCE TEST DIAGNO-
SIS” in

HA-80, "Inspection"

.

*5

“CONTAMINATED REFRIGERANT”
in

HAC-118, "Working with HFC-134a

(R-134a)"

.

SJIA1275E