Nissan Note E12. Instruction — part 365
HA-18
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REFRIGERANT
4. Press UV lamp switch (5) and check A/C system for refrigerant leaks. (Where refrigerant leaks occur, flu-
orescent leak detection dye appears green in color.)
WARNING:
Do not look directly into UV lamp light source.
NOTE:
• For continuous operating time of UV lamp, follow the manufacturer’s operating instructions.
• Illuminate pipe joints from different angles using UV lamp to check for leaks.
• Use a mirror in areas that are difficult to see to check for leaks.
• Refrigerant leaks from the evaporator can be detected by soaking a cotton swab or similar material with
drain hose water and illuminating it using the UV lamp.
• Dust, dirt, and packing material adhesives used for condenser, evaporator, and other components may
fluoresce. Be careful not to misidentify leaks.
5. Repair or replace parts where refrigerant leaks occur and wipe off fluorescent leak detection dye.
NOTE:
Completely wipe off fluorescent leak detection dye from gaps between parts, screw threads, and other
components using a cotton swab or similar material.
6. Use a UV lamp to check that no fluorescent leak detection dye remains after finishing work.
WARNING:
Do not look directly into UV lamp light source.
NOTE:
• For continuous operating time of UV lamp, follow the manufacturer’s operating instructions.
• Dust, dirt, and packing material adhesives used for condenser, evaporator, and other components may
fluoresce. Be careful not to misidentify leaks.
CHECK REFRIGERANT LEAKS USING ELECTRONIC LEAK DETECTOR
WARNING:
Do not check for refrigerant leaks while the engine is running.
CAUTION:
Be careful of the following items so that inaccurate checks or misidentifications are avoided.
• Do not allow refrigerant vapor, shop chemical vapors, cigarette smoke or other contaminates around
the vehicle.
• Always check refrigerant leaks in a low air flow environment so that refrigerant may not disperse.
1. Stop the engine.
2. Connect recovery/recycling/recharging equipment or manifold gauge set to the A/C service valves.
3. Check that A/C refrigerant pressure is 345 kPa (3.52 kg/cm
2
, 50 psi) or more when temperature is 16
°C
(61
°F) or more. When pressure is lower than the specified value, recycle refrigerant completely and
recharge refrigerant to the specified level.
NOTE:
Leaks may not be detected if A/C refrigerant pressure is 345 kPa (3.52 kg/cm
2
, 50 psi) or less when tem-
perature is less than 16
°C (61°F).
4. Clean the area where the refrigerant leak check is performed and check for refrigerant leaks along all sur-
faces of pipe connections and A/C system components using electronic leak detector probe.
CAUTION:
• Continue checking once leaks are found. Always continue and complete checking along all pipe
connections and A/C system components for additional leaks.
• When leaks are detected, clean leak area using compressed air and re-check.
• When checking the evaporator for leaks, always clean inside of drain hose so that the probe sur-
face may not be exposed to water or dirt.
NOTE:
• Always check for leaks starting from the high-pressure side and continue to the low-pressure side.
• When checking the evaporator for leaks, operate blower motor for 15 minutes or more at the maximum
speed while the engine is stopped. Insert electronic leak detector probe into drain hose and hold for 10
minutes or more.
• When disconnecting shut-off valve that is connected to A/C service valve, always evacuate remaining
refrigerant so that misidentification can be avoided.
5. Repair or replace parts where refrigerant leaks occur.
6. Start the engine and set A/C control in the following conditions.
• A/C switch: ON
REFRIGERANT
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• Air flow: VENT (ventilation)
• Intake door position: Recirculation
• Temperature setting: Full cold
• Blower speed: Maximum
7. Run the engine at approximately 1,500 rpm for two minutes or more.
8. Stop the engine. Check for refrigerant leaks. Go to step 4.
WARNING:
Be careful not to get burned when the engine is hot.
NOTE:
• Start refrigerant leak check immediately after the engine is
stopped.
• When refrigerant circulation is stopped, pressure on the low-
pressure side rises gradually and pressure on the high-pres-
sure side falls gradually.
• The higher the pressure is, the easier it is to find refrigerant
leaks.
Recycle Refrigerant
INFOID:0000000009460335
WARNING:
• Always use HFC-134a for A/C refrigerant. If CFC-12 is accidentally charged, compressor damage
may result 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.
• Do not breathe A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose, or throat.
• Do not allow HFC-134a to be exposed to an open flame. Poisonous gas is produced if refrigerant
burns. Keep workshop well ventilated.
1. Perform oil return operation. Refer to
HA-21, "Perform Oil Return Operation"
. (If refrigerant or oil leaks are
detected in a large amount, omit this step, and go to step 2.)
CAUTION:
Do not perform oil return operation if a large amount of refrigerant or oil has leaked.
2. Check pressure gauge readings of recovery/recycling/recharging equipment. When remaining pressure
exists, recycle refrigerant from high-pressure hose and low-pressure hose.
NOTE:
Follow manufacturer instructions for the handling or maintenance of the equipment. Do not fill the equip-
ment with non-specified refrigerant.
3. Remove A/C service valve caps from the vehicle.
4. Connect recovery/recycling/recharging equipment to A/C service valves.
5. Operate recovery/recycling/recharging equipment, and recycle refrigerant from the vehicle.
6. Evacuate air for 10 minutes or more to remove any remaining refrigerant integrated in the compressor oil,
etc.
7. Refrigerant recycle operation is complete.
Charge Refrigerant
INFOID:0000000009460336
WARNING:
• Always use HFC-134a for A/C refrigerant. If CFC-12 is accidentally charged, compressor damage
may result 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.
• Do not breathe A/C refrigerant and oil vapor or mist. Exposure my irritate eyes, nose, or throat.
• Do not allow HFC-134a to be exposed to an open flame. Poisonous gas is produce if refrigerant
burns. Keep workshop well ventilated.
1. Connect recovery/recycling/recharging equipment to the A/C service valves.
SHA839E
HA-20
< PERIODIC MAINTENANCE >
REFRIGERANT
2. Operate recovery/recycling/recharging equipment, and evacuate air from A/C system for 25 minutes or
more.
CAUTION:
Evacuate air for 15 minutes or more if 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 200g of refrigerant and check that there are no refrigerant
leaks. Refer to
.
CAUTION:
Check the airtightness for 15 minutes or more if parts are replaced.
4. If parts other than the compressor are replaced, fill compressor oil according to parts that are replaced.
HA-21, "Oil Adjusting Procedure for Components Replacement Except Compressor"
.
5. Charge the specified amount of refrigerant into A/C system.
6. Check that the A/C system operates normally.
7. Collect the refrigerant from the high-pressure hose and low-pressure hose of recovery/recycling/recharg-
ing equipment. Disconnect recovery/recycling/recharging equipment.
8. Install A/C service valve caps.
9. Refrigerant charge is complete.
OIL
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OIL
Description
INFOID:0000000009014865
MAINTENANCE OF OIL LEVEL
The compressor oil circulates in the system together with the refrigerant. It is necessary to add oil to the com-
pressor when replacing A/C system components or when a large amount of refrigerant leaks from the system.
It is important to always maintain oil level within the specified level. Otherwise, the following conditions may
occur.
• Insufficient oil amount: Stuck compressor
• Excessive oil amount: Insufficient cooling (caused by insufficient heat exchange)
Inspection
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If a compressor is malfunctioning (internal noise, insufficient cooling), check the compressor oil.
1.
COMPRESSOR OIL JUDGMENT
1. Remove the compressor. Refer to
HA-25, "Removal and Installation"
.
2. Sample the compressor oil and judge on the figure.
Judgement result 1>>Replace compressor only.
Judgement result 2>>Replace compressor and condenser (includes liquid tank).
Perform Oil Return Operation
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CAUTION:
If a large amount of refrigerant or oil leaks from the system, do not perform oil return operation.
1. Start the engine and set the front air control to the following conditions.
• Engine speed: Idling to 1,200 rpm
• A/C switch: ON
• Blower speed: Maximum
• Intake door position: Recirculation
• Temperature setting: Full cold
2. Perform oil return operation for approximately 10 minutes.
3. Stop the engine.
4. Oil return operation is complete.
Oil Adjusting Procedure for Components Replacement Except Compressor
INFOID:0000000009014868
Add the amount of oil that is calculated according to the following conditions.
Example: Oil amount to be added when replacing evaporator [m (Imp fl oz.)] = 35 (1.2) +
α
Name
A/C System Oil Type: DH-PR
JSIIA0927GB
Conditions
Oil amount to be added to A/C system
m (Imp fl oz.)
Replace evaporator
35 (1.2)
Replace condenser (includes liquid tank)
20 (0.7)
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