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Nissan Leaf. Manual - part 722

HA-10

< PRECAUTION >

[WITH HEAT PUMP SYSTEM]

PRECAUTIONS

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

replace the parts.

Service Equipment

INFOID:0000000010122085

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.

SERVICE COUPLERS

RHA270DA

SHA533D

RHA272D

PRECAUTIONS

HA-11

< PRECAUTION >

[WITH HEAT PUMP SYSTEM]

Never attempt to connect HFC-134a (R-134a) service couplers to

the CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers

do not properly connect to the CFC-12 (R-12) system. However, if an

improper connection is attempted, discharging and contamination

may occur.

REFRIGERANT WEIGHT SCALE

Verify that no refrigerant other than HFC-134a (R-134a) and speci-

fied lubricants have been used with the scale. The hose fitting must

be 1/2

″-16 ACME if the scale controls refrigerant flow electronically.

CALIBRATING ACR4 WEIGHT SCALE

Calibrate the scale each three month.

To calibrate the weight scale on the ACR4:
1. Press “Shift/Reset” and “Enter” at the same time.
2. Press “8787”. “A1” is displayed.
3. Remove all weight from the scale.
4. Press “0”, then press “Enter”. “0.00” is displayed and change to “A2”.
5. Place a known weight (dumbbell or similar weight), between 4.5 and 8.6 kg (10 and 19 lb.) on the center

of the weight scale.

6. Enter the known weight using four digits. (Example 10 lb. = 10.00, 10.5 lb. = 10.50)
7. Press “Enter” — the display returns to the vacuum mode.
8. Press “Shift/Reset” and “Enter” at the same time.
9. Press “6” — the known weight on the scale is displayed.
10. Remove the known weight from the scale. “0.00” is displayed.
11. Press “Shift/Reset” to return the ACR4 to the program mode.

CHARGING CYLINDER

Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder’s top valve

when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an

electronic scale or of quality recycle/recharge equipment.

Shut-off valve rotation

A/C service valve

Clockwise

Open

Counterclockwise

RHA273D

RHA274D

HA-12

< PREPARATION >

[WITH HEAT PUMP SYSTEM]

PREPARATION

PREPARATION

Commercial Service Tools

INFOID:0000000010122086

Tool name

Description

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

Insulated gloves

Comply with EN60903:

• Use protective gloves made of

insulating material.

• The protective gloves must be

capable of resisting the voltage
of 600 or more.

Removing and installing high voltage
components

Leather gloves
[Use leather gloves that can fas-
ten the wrist tight]

• Removing and installing high volt-

age components

• Protect insulated gloves

Insulated safety shoes

Comply with EN60903:

• Use protective shoes made of

insulating material.

• The protective shoes must be

capable of resisting the voltage
of 600 or more.

Removing and installing high voltage
components

Face shield
[Comply with EN166.]

• Removing and installing high volt-

age components

• To protect face from the spatter on

the work to electric line

Insulated helmet

Removing and installing high voltage
components

S-NT201

JMCIA0149ZZ

JPCIA0066ZZ

JPCIA0011ZZ

JPCIA0167ZZ

JPCIA0013ZZ

PREPARATION

HA-13

< PREPARATION >

[WITH HEAT PUMP SYSTEM]

Insulation resistance tester
(Multi tester)

Measuring insulation resistance,volt-
age and resistance

(J-48710)
NISSAN ACR2009 RRR Unit

Function: Refrigerant recovery, recy-
cling and recharging

(J-41995)
Electrical leak detector

Power supply:
DC12V(Battery terminal)

Manifold gauge set
(with hoses and couplers)

Identification:
• The gauge face indicates HFC-

134a (R-134a).

Fitting size: Thread size
• 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 perma-
nently attached.

Tool name

Description

JPCIA0014ZZ

WJIA0293E

AHA281A

RJIA0196E

S-NT202

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