Nissan March K13. Manual - part 359

SYSTEM

HA-15

< SYSTEM DESCRIPTION >

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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)].

HA-16

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000006032315

OVERALL SEQUENCE

DETAILED FLOW

1.

INTERVIEW FOR MALFUNCTION

Interview the symptom to the customer.

NNIIA0143GB

DIAGNOSIS AND REPAIR WORKFLOW

HA-17

< BASIC INSPECTION >

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>> GO TO 2.

2.

SYMPTOM CHECK

Check the symptom from the customer's information. Check that any symptom occurs other than the inter-
viewed symptom.

Insufficient cooling/heating>>GO TO 3.
Refrigerant leakage>>GO TO 6.
Noise >> GO TO 7.

3.

CONTROL SYSTEM DIAGNOSIS

Perform the system diagnosis for the A/C control system. Refer to 

HAC-36, "Work Flow"

 (AUTOMATIC AIR

CONDITIONER) or 

HAC-97, "Work Flow"

 (MANUAL AIR CONDITIONER), 

HAC-136, "Work Flow"

 (HEATER

AND VENTILATION).

Is A/C control system normal?

YES

>> GO TO 4.

NO

>> GO TO 8.

4.

PERFORMANCE TEST

Perform the performance test. Check the operation of each part. Refer to 

HA-25, "Inspection"

.

>> GO TO 5.

5.

TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE

Diagnose using a manifold gauge whenever system's high and/or low side pressure(s) is/are unusual. Specify
the malfunctioning part. Refer to 

HA-27, "Symptom Table"

.

Low refrigerant charge>>GO TO 6.
Except above>>GO TO 8.

6.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Specify the malfunctioning part. Refer to 

HA-18, "Leak Test"

.

>> GO TO 8.

7.

TROUBLE DIAGNOSIS FOR NOISE

Perform trouble diagnosis for noise. Specify the malfunctioning part. Refer to 

HA-29, "Symptom Table"

.

>> GO TO 8.

8.

MALFUNCTION PART REPAIR

Repair or replace the malfunctioning part.

>> GO TO 9.

9.

REPAIR CHECK (OPERATION CHECK)

Check the operation of each part.

Does it operate normally?

YES

>> INSPECTION END

NO

>> GO TO 2.

HA-18

< BASIC INSPECTION >

REFRIGERANT

REFRIGERANT

Description

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CONNECTION OF SERVICE TOOLS AND EQUIPMENT

Leak Test

INFOID:0000000006032317

CHECK REFRIGERANT LEAKAGE USING FLUORESCENT LEAK DETECTION DYE

1.

Install a fender cover (1).

2.

Wear UV safety goggles (2) provided with refrigerant dye leak detection kit.

3.

Connect power cable (4) of UV lamp (6) to positive and negative terminals of the battery (3).

4.

Press UV lamp switch (5) and check A/C system for refrigerant leakage. (Where refrigerant leakage
occurs, fluorescent leak detection dye appears in green color.)

WARNING:

1.

Shut-off valve

2.

A/C service valve

3.

Recovery/recycling/recharging 
equipment

4.

Vacuum pump

5.

Manifold gauge set

6.

Refrigerant container (HFC-134a)

7.

Weight scale

A.

Preferred (best) method

B.

Alternative method

C.

For charging

JSIIA0258ZZ

RJIA3815J