Nissan Leaf. Instruction — 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 instruction valve placed near the hose-
to-pump connection, as per the following.
• Vacuum pumps usually have a instruction isolator valve as part of the
pump. Close this valve to isolate the service hose from the pump.
• Use a hose equipped with a instruction 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 instruction 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]
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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
Close
RHA273D
RHA274D
HA-12
< PREPARATION >
[WITH HEAT PUMP SYSTEM]
PREPARATION
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]
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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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