Nissan Leaf. Manual — part 741
HA-86
< BASIC INSPECTION >
[WITHOUT HEAT PUMP SYSTEM]
REFRIGERANT
6. Evacuate air for 10 minutes or more to remove any remaining refrigerant integrated to compressor lubri-
cant, etc.
7. Refrigerant recycle operation is complete.
Charge Refrigerant
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WARNING:
• Always use HFC-134a for refrigerant. If CFC-12 is accidentally charged, compressor is damaged due
to insufficient lubrication.
• Always observe and follow precautions described on refrigerant container. Incorrect handling may
result in an explosion of refrigerant container, frostbite, or the loss of eyesight.
• When charging with refrigerant gas, charge with the prescribed amount from a new service can.
• Do not breathe refrigerant gas and lubricant vapor or mist. Exposure my irritate eyes, nose, or
throat.
• Do not allow HFC-134a to be exposed to an open flame or others because it generates poisonous
gas when in contact with high temperature objects. Keep workshop well ventilated.
• 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.
1. Connect manifold gauge (for HFC-134a) to the service valve.
2. Connect vacuum pump to manifold gauge and operate the pump. Apply vacuum to the cooler cycle for
approximately 25 minutes or longer.
CAUTION:
Evacuate air for 15 minutes or more if the parts are replaced.
3. Check the airtightness of A/C system for 25 minutes or more. If pressure raises more than the specified
level, charge A/C system with approximately 200 g (0.4 lb) refrigerant and check that there is no refriger-
HA-84, "Check Refrigerant Leakage"
CAUTION:
Check the airtightness for 15 minutes or more if the parts are replaced.
4. If parts other than compressor were replaced, add compressor oil according to parts that were replaced.
HA-87, "Lubricant Adjusting Procedure for Components Replacement Except Compressor"
5. Charge the A/C system from a service can with the specified amount of refrigerant.
6. Check that A/C system operates normally.
7. Disconnect manifold gauge.
8. Install A/C service valve cap.
9. Refrigerant charge is complete.
LUBRICANT
HA-87
< BASIC INSPECTION >
[WITHOUT HEAT PUMP SYSTEM]
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LUBRICANT
Description
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MAINTENANCE OF LUBRICANT LEVEL
The compressor lubricant is circulating in the system together with the refrigerant. It is necessary to fill com-
pressor with lubricant when replacing A/C system parts or when a large amount of refrigerant leakage is
detected. It is important to always maintain lubricant level within the specified level. Or otherwise, the following
conditions may occur.
• Insufficient lubricant amount: Stuck compressor
• Excessive lubricant amount: Insufficient cooling (caused by insufficient heat exchange)
Inspection
INFOID:0000000010122161
If there is a malfunction (abnormal noise from inside, cooling failure) in the compressor unit, check the com-
pressor oil.
1.
CHECK COMPRESSOR OIL
1. Remove electric compressor. Refer to
HA-95, "Removal and Installation"
2. Refer to the diagram and judge the drained compressor oil.
Judgment result 1:>>Replace only compressor.
Judgment result 2:>>Replace compressor and liquid tank.
Perform Lubricant Return Operation
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CAUTION:
If a large amount of refrigerant or lubricant leakage is detected, never perform lubricant return opera-
tion.
1. Start the vehicle and set to the following conditions.
• A/C switch: ON
• Blower motor speed: Maximum speed set
• Intake switch: Recirculation set
• Temperature setting: Full cold
2. Perform lubricant return operation for approximately 10 minutes.
3. Stop A/C operation.
4. Oil return operation is complete.
Lubricant Adjusting Procedure for Components Replacement Except Compressor
INFOID:0000000010122163
Fill with lubricant for the amount that is calculated according to the following conditions.
Example: Lubricant amount to be added when replacing evaporator and liquid tank [m (Imp fl oz)] = 35 (1.2)
+ 10 (0.4) +
α
Specified lubricant
AE10 (special oil for electric compressors)
JSIIA0927GB
HA-88
< BASIC INSPECTION >
[WITHOUT HEAT PUMP SYSTEM]
LUBRICANT
Lubricant Adjusting Procedure for Compressor Replacement
INFOID:0000000010122164
1. Drain lubricant from removed compressor and measure lubricant amount.
1. Turn the compressor so that it faces downward, and drain
the compressor oil from high-pressure port (A) and low-
pressure port (B).
2. Measure total amount of lubricant that is drained from
removed compressor.
2. Drain lubricant from a new compressor that is calculated accord-
ing to the following conditions.
CAUTION:
If lubricant amount that is drained from removed compressor is less than 60 m (2.1 Imp fl oz),
perform calculation by setting “D” as 40 m (1.4 Imp fl oz).
Example: Lubricant amount to be drained from a new compressor when replacing compressor and liquid
tank [m (Imp fl oz)] [D = 60 (2.1),
α = 5 (0.2)]
150 (5.3)
− [60 (2.1) + 20 (0.7) + 5 (0.2) + 5 (0.2)] = 60 (2.1)
3. Install compressor and check the operation.
Item
Lubricant amount to be added to A/C system
m (Imp fl oz)
Replace evaporator
35 (1.2)
Replace condenser
15 (0.5)
Replace liquid tank
5 (0.2)
Refrigerant leakage is detected
Large amount leakage
30 (1.1)
Small amount leakage
—
Lubricant amount that is recycled together with refrigerant during recycle operation
α
JMIIA2630ZZ
Amount to be drained (A)
[m (Imp fl oz)] = F
− (D + S + R + α)
F
: Lubricant amount that a new compressor con-
tains [150 (5.3)]
D
: Lubricant amount that is drained from removed
compressor
S
: Lubricant amount that remains inside of removed
compressor [20 (0.7)]
R
: Lubricant amount to be added according to com-
ponents that are removed except compressor
α
: Lubricant amount that is recycled together with
refrigerant during recycle operation
Item
Lubricant amount to be added to A/C system
m (Imp fl oz)
Replace evaporator
35 (1.2)
Replace condenser
15 (0.5)
Replace liquid tank
5 (0.2)
JPIIA1455GB
PERFORMANCE TEST
HA-89
< BASIC INSPECTION >
[WITHOUT HEAT PUMP SYSTEM]
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PERFORMANCE TEST
Inspection
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INSPECTION PROCEDURE
1. Connect the manifold gauge set.
2. Set the vehicle, and set to the following condition.
Test condition
3. Maintain test condition until A/C system becomes stable. (Approximately 10 minutes)
4. Check that the characteristics for “intake temperature vs. discharge temperature” and “ambient tempera-
ture vs. pressure” are within the standard values.
5. When test results are within the specified value, inspection is complete.
If any of test result is out of the specified value, perform diagnosis by gauge pressure. Refer to
"Trouble Diagnosis For Unusual Pressure"
.
Surrounding condition
Indoors or in the shade (in a well-ventilated place)
Vehicle condition
Door
Closed
Door glass
Full open
Hood
Open
A/C condition
Temperature control switch or
dial
Full cold
A/C switch
ON
Mode switch
(Ventilation) set
Intake switch
(Recirculation) set
Blower motor speed
Maximum speed set
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