Nissan March K13. Manual - part 358

PREPARATION

HA-11

< PREPARATION >

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Sealant or/and Lubricant

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HFC-134a (R-134a) Service Tool and Equipment

• Never mix HFC-134a (R-134a) refrigerant and/or its specified lubricant with CFC-12 (R-12) refrigerant and/

or its lubricant.

• Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/

lubricant.

• Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles

refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid
mixed use of the refrigerants/lubricant.

• Never use adapters that convert one size fitting to another: refrigerant/lubricant contamination occurs and

compressor malfunction may result.

Manifold gauge set (with hos-
es and couplers)

Identification:
• The gauge face indicates HFC-134a (R-

134a).

Fitting size: Thread size

• 1/2

″

-16 ACME

Service hoses
• High-pressure side hose
• Low-pressure side hose
• Utility hose

Hose color:
• Low-pressure side hose: Blue with black 

stripe

• High-pressure side hose: Red with black 

stripe

• Utility hose: Yellow with black stripe or 

green with black stripe

Hose fitting to gauge:

• 1/2

″

-16 ACME

Service couplers
• High-pressure side coupler
• Low-pressure side coupler

Hose fitting to service hose:
M14 x 1.5 fitting is optional or permanently 
attached.

Refrigerant weight scale

For measuring of refrigerant
Fitting size: Thread size

1/2

″

-16 ACME

Vacuum pump
(Including the isolator valve)

Capacity:
• Air displacement: 4 CFM
• Micron rating: 20 microns
• Oil capacity: 482 g (17 oz.)
Fitting size: Thread size

• 1/2

″

-16 ACME

Tool name

Description

RJIA0196E

S-NT201

S-NT202

S-NT200

S-NT203

HA-12

< PREPARATION >

PREPARATION

Tool name

Description

HFC-134a (R-134a) refrigerant

Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size

• Large container 1/2

″

-16 ACME

UV Luminous Oil Type S (DH-PS)

Type: Polyalkylene glycol oil (PAG), 
type S (DH-PS)
Application:
HFC-134a (R-134a) swash plate com-
pressors

Capacity: 40 m

 (1.4 Imp fl oz.) 

S-NT196

S-NT197

COMPONENT PARTS

HA-13

< SYSTEM DESCRIPTION >

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SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

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Component Description

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JMIIA0653ZZ

1.

Condenser

2.

Compressor

3.

Refrigerant pressure sensor

4.

Liquid tank

5.

Evaporator

6.

Expansion valve

A.

Built-in heater & cooling unit assem-
bly

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 

EC-29, "Refrigerant Pressure Sensor"

 (for thailand) or 

EC-333, "Refrigerant Pressure Sen-

sor"

 (except for thailand).

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-14

< SYSTEM DESCRIPTION >

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

Automatic air conditioner

• When intake sensor detects that evaporator surface temperature is 2

°

C (36

°

F) or less, A/C auto amp.

requests BCM to turn the compressor OFF.

• BCM requests ECM to turn the compressor to OFF by the signal from A/C auto amp., and ECM makes A/C

relay to OFF, and stops the compressor.

Manual air conditioner

• When thermo control amp. detects that evaporator surface temperature becomes 2

°

C (36

°

F) or less, BCM

requests ECM to turn the compressor 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 condenser exit. 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 120 kPa (1.2 bar, 1.2 kg/cm

2

, 17 psi) or less

JPIIA1671GB