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Nissan Leaf. Manual - part 752

PRECAUTIONS

HAC-11

< PRECAUTION >

[AUTO A/C (WITH HEAT PUMP)]

HAC

Indicate "HIGH VOLTAGE. DO NOT TOUCH" on the vehicle under repair/inspection to call attention to other

workers.

Precaution for Removing 12V Battery

INFOID:0000000010121723

1. Check that EVSE is not connected.

NOTE:

If EVSE is connected, the air conditioning system may be automatically activated by the timer A/C func-

tion.

2. Turn the power switch OFF

→ ON → OFF. Get out of the vehicle. Close all doors (including back door).

JSAIA1600GB

HAC-12

< PRECAUTION >

[AUTO A/C (WITH HEAT PUMP)]

PRECAUTIONS

3. Check that the charge status indicator lamp does not blink and wait for 5 minutes or more.

NOTE:

If the battery is removed within 5 minutes after the power switch is turned OFF, plural DTCs may be

detected.

4. Remove 12V battery within 1 hour after turning the power switch OFF

→ ON → OFF.

NOTE:

• The 12V battery automatic charge control may start automatically even when the power switch is in

OFF state.

• Once the power switch is turned ON

→ OFF, the 12V battery automatic charge control does not start for

approximately 1 hour.

CAUTION:

• After all doors (including back door) are closed, if a door (including back door) is opened before

battery terminals are disconnected, start over from Step 1.

• After turning the power switch OFF, if “Remote A/C” is activated by user operation, stop the air

conditioner and start over from Step 1.

Precautions for Service Work of Cooler System

INFOID:0000000010121724

GENERAL REFRIGERANT PRECAUTION

WARNING:

• Never breathe A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and

throat. Remove HFC-134a (R-134a) from the 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]. Ventilate work area before resuming service if accidental system discharge

occurs. Additional health and safety information may be obtained from refrigerant and lubricant

manufacturers.

• Never release refrigerant into the air. Use approved recovery/recycling recharging equipment to cap-

ture the refrigerant each time an air conditioning system is discharged.

• Wear always eye and hand protection (goggles and gloves) when working with any refrigerant or air

conditioning system.

• Never store or heat refrigerant containers above 52

°C (126°F).

• Never heat a refrigerant container with an open flame; Place the bottom of the container in a warm

pail of water if container warming is required.

• Never intentionally drop, puncture, or incinerate refrigerant containers.

• Keep refrigerant away from open flames: poisonous gas is produced if refrigerant burns.

• Refrigerant displaces oxygen, therefore be certain to work in well ventilated areas to prevent suffo-

cation.

• Never pressure test or leakage test HFC-134a (R-134a) service equipment and/or vehicle air condi-

tioning systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a)

have been shown to be combustible at elevated pressures. These mixtures, if ignited, may cause

injury or property damage. Additional health and safety information may be obtained from refriger-

ant manufacturers.

WORKING WITH HFC-134a (R-134a)

CAUTION:

• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. Compressor mal-

function is likely to occur if the refrigerants are mixed, refer to “CONTAMINATED REFRIGERANT”

below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refriger-

ant recovery/recycling recharging equipment and Refrigerant Identifier.

• Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo-

nents. Compressor malfunction is likely to occur if lubricant other than that specified is used.

• If rotary compressor oil (DH-PR), swash plate compressor oil (DH-PS), or CFC-12 compressor oil

(mineral oil) is used, the insulation resistance may be reduced. Never use these oils.

• The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol-

lowing handling precautions must be observed:

- Cap (seal) immediately the component to minimize the entry of moisture from the atmosphere when

removing refrigerant components from a vehicle.

- Never remove the caps (unseal) until just before connecting the components when installing refrig-

erant components to a vehicle. Connect all refrigerant loop components as quickly as possible to

minimize the entry of moisture into system.

PRECAUTIONS

HAC-13

< PRECAUTION >

[AUTO A/C (WITH HEAT PUMP)]

HAC

- Use only the specified lubricant from a sealed container. Reseal immediately containers of lubricant.

Lubricant becomes moisture saturated and should not be used without proper sealing.

- Never allow lubricant to come in contact with styrene foam parts. Damage may result.

REFRIGERANT CONNECTION

A new type refrigerant connection has been introduced to all refrigerant lines except the following location.

• Expansion valve to evaporator

• Refrigerant pressure sensor to liquid tank

WARNING:

Check that all refrigerant is discharged into the recycling equipment and the pressure in the system is

less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.

CAUTION:

Observe the following when replacing or cleaning refrigerant cycle components.

• To prevent fluorescent indicator from entering, prepare and use exclusive hose for EV (electric vehi-

cle) and HEV (hybrid vehicle) when connecting recovery/recycling/recharging equipment.

• Store it in the same way at it is when mounted on the car when the compressor is removed. Failure

to do so will cause lubricant to enter the low-pressure chamber.

• Use the torque wrench or the backup wrench when installing the piping.

• Plug immediately all openings to prevent entry of dust and moisture after disconnecting tubes.

• Connect the pipes at the final stage of the operation when installing an air conditioner in the vehicle.

Never remove the seal caps of pipes and other components until just before required for connection.

• Allow components stored in cool areas to warm to working area temperature before removing seal

caps. This prevents condensation from forming inside A/C components.

• Remove thoroughly moisture from the refrigeration system before charging the refrigerant.

• Replace always used O-rings.

• Apply lubricant to circle of the O-rings shown in illustration when connecting tube. Be careful not to

apply lubricant to threaded portion.

• O-ring must be closely attached to the groove portion of tube.

• Be careful not to damage O-ring and tube when replacing the O-ring.

• Connect tube until a click can be heard. Then tighten the nut or bolt by hand. Check that the O-ring is

installed to tube correctly.

• Perform leakage test and make sure that there is no leakage from connections after connecting line.

Disconnect that line and replace the O-ring when the refrigerant leaking point is found. Then tighten

connections of seal seat to the specified torque.

COMPRESSOR

CAUTION:

• Plug all openings to prevent moisture and foreign matter from entering.

• Store it in the same way at it is when mounted on the car when the compressor is removed.

• Follow “Maintenance of Lubricant Quantity in Compressor” exactly when replacing or repairing

compressor. Refer to

HA-29, "Description"

REFRIGERANT LEAKAGE DETECTING FLOURESCENT INDICATOR

CAUTION:

RHA861F

HAC-14

< PRECAUTION >

[AUTO A/C (WITH HEAT PUMP)]

PRECAUTIONS

• Never use fluorescent indicators as these may reduce the insulation resistance.

• If a fluorescent indicator enters the refrigerant cycle, either wash the refrigerant cycle parts or

replace the parts.

Service Equipment

INFOID:0000000010121725

RECOVERY/RECYCLING RECHARGING EQUIPMENT

Be certain to follow the manufacturer’s instructions for machine operation and machine maintenance. Never

introduce any refrigerant other than that specified into the machine.

VACUUM PUMP

The lubricant contained inside the vacuum pump is not compatible

with the specified lubricant for HFC-134a (R-134a) A/C systems.

The vent side of the vacuum pump is exposed to atmospheric pres-

sure. So the vacuum pump lubricant may migrate out of the pump

into the service hose. This is possible when the pump is switched

OFF after evacuation (vacuuming) and hose is connected to it.

To prevent this migration, use a manual valve placed near the hose-

to-pump connection, as per the following.

• Vacuum pumps usually have a manual isolator valve as part of the

pump. Close this valve to isolate the service hose from the pump.

• Use a hose equipped with a manual shut-off valve near the pump

end for pumps without an isolator. Close the valve to isolate the

hose from the pump.

• Disconnect the hose from the pump if the hose has an automatic

shut-off valve. As long as the hose is connected, the valve is open

and lubricating oil may migrate.

Some one-way valves open when vacuum is applied and close

under no vacuum condition. Such valves may restrict the pump’s

ability to pull a deep vacuum and are not recommended.

MANIFOLD GAUGE SET

Be certain that the gauge face indicates HFC-134a or R-134a. Be

sure the gauge set has 1/2

″-16 ACME threaded connections for ser-

vice hoses. Confirm the set has been used only with refrigerant

HFC-134a (R-134a) and specified lubricants.

SERVICE HOSES

Be certain that the service hoses display the markings described

(colored hose with black stripe). All hoses must equip positive shut-

off devices (either manual or automatic) near the end of the hoses

opposite to the manifold gauge.

RHA270DA

SHA533D

RHA272D

Content .. 750 751 752 753 ..