Đang tải... (xem toàn văn)
HỆ THỐNG ĐIỀU HÒA, SƯỞI TRÊN NISSAN VERSA SEDAN ĐỜI 2012
HA-1 VENTILATION, HEATER & AIR CONDITIONER C D E F G H J K L M SECTION HA A B HA N O P CONTENTS HEATER & AIR CONDITIONING SYSTEM PRECAUTION 3 PRECAUTIONS 3 Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TEN- SIONER" 3 Precaution for Work 3 Precaution for Refrigerant Connection 3 Precautions For Refrigerant System Service 5 Service Equipment 7 PREPARATION 9 PREPARATION 9 Special Service Tool 9 HFC-134a (R-134a) Service Tool and Equipment 9 Commercial Service Tool 11 SYSTEM DESCRIPTION 12 COMPONENT PARTS 12 Component Parts Location 12 Component Description 12 SYSTEM 13 System Diagram 13 System Description 13 BASIC INSPECTION 14 DIAGNOSIS AND REPAIR WORKFLOW 14 Workflow 14 REFRIGERANT 16 Description 16 Leak Test 16 Recycle Refrigerant 18 Charge Refrigerant 18 OIL 20 Description 20 Inspection 20 Perform Oil Return Operation 20 Oil Adjusting Procedure for Components Replace- ment Except Compressor 20 Oil Adjusting Procedure for Compressor Replace- ment 21 PERFORMANCE TEST 22 Inspection 22 SYMPTOM DIAGNOSIS 24 HEATER AND AIR CONDITIONING SYSTEM SYMPTOMS 24 Symptom Table 24 REFRIGERATION SYSTEM SYMPTOMS 25 Trouble Diagnosis For Unusual Pressure 25 Symptom Table 25 NOISE 27 Symptom Table 27 REMOVAL AND INSTALLATION 28 COMPRESSOR 28 Exploded View 28 COMPRESSOR 28 COMPRESSOR : Removal and Installation 28 Inspection 29 COOLER PIPE AND HOSE 30 Exploded View 30 HIGH-PRESSURE FLEXIBLE HOSE 30 HIGH-PRESSURE FLEXIBLE HOSE : Removal and Installation 30 LOW-PRESSURE FLEXIBLE HOSE 31 LOW-PRESSURE FLEXIBLE HOSE : Removal and Installation 31 HIGH-PRESSURE PIPE 31 Revision: July 2011 2012 Versa Sedan HA-2 HIGH-PRESSURE PIPE : Removal and Installa- tion 31 CONDENSER 33 Exploded View 33 CONDENSER 33 CONDENSER : Removal and Installation 33 LIQUID TANK 34 LIQUID TANK : Removal and Installation 34 REFRIGERANT PRESSURE SENSOR 34 REFRIGERANT PRESSURE SENSOR : Remov- al and Installation 34 A/C UNIT ASSEMBLY 36 Exploded View 36 A/C UNIT ASSEMBLY 36 A/C UNIT ASSEMBLY : Removal and Installation 36 EVAPORATOR 37 EVAPORATOR : Removal and Installation 37 HEATER CORE 37 HEATER CORE : Removal and Installation 37 EXPANSION VALVE 38 EXPANSION VALVE : Removal and Installation 38 UNIT DISASSEMBLY AND ASSEMBLY 39 A/C UNIT ASSEMBLY 39 Exploded View 39 SERVICE DATA AND SPECIFICATIONS (SDS) 40 SERVICE DATA AND SPECIFICATIONS (SDS) 40 Compressor 40 Oil 40 Refrigerant 40 Revision: July 2011 2012 Versa Sedan PRECAUTIONS HA-3 < PRECAUTION > C D E F G H J K L M A B HA N O P PRECAUTION PRECAUTIONS Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" INFOID:0000000007631094 The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SR and SB section of this Service Man- ual. WARNING: • To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. • Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SR section. • Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har- ness connectors. PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS WARNING: • When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni- tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. • When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service. Precaution for Work INFOID:0000000007631097 • When removing or disassembling each component, be careful not to damage or deform it. If a component may be subject to interference, be sure to protect it with a shop cloth. • When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component with a shop cloth or vinyl tape to protect it. • Protect the removed parts with a shop cloth and prevent them from being dropped. • Replace a deformed or damaged clip. • If a part is specified as a non-reusable part, always replace it with new one. • Be sure to tighten bolts and nuts securely to the specified torque. • After installation is complete, be sure to check that each part works properly. • Follow the steps below to clean components. - Water soluble dirt: Dip a soft cloth into lukewarm water, and wring the water out of the cloth to wipe the dirty area. Then rub with a soft and dry cloth. - Oily dirt: Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%), and wipe the dirty area. Then dip a cloth into fresh water, and wring the water out of the cloth to wipe the detergent off. Then rub with a soft and dry cloth. • Do not use organic solvent such as thinner, benzene, alcohol, or gasoline. • For genuine leather seats, use a genuine leather seat cleaner. Precaution for Refrigerant Connection INFOID:0000000007631340 A new type refrigerant connection has been introduced to all refrigerant lines except the following location. • Expansion valve to evaporator • Refrigerant pressure sensor to condenser Revision: July 2011 2012 Versa Sedan HA-4 < PRECAUTION > PRECAUTIONS FEATURES OF NEW TYPE REFRIGERANT CONNECTION • The O-ring has been relocated. It has also been provided with a groove for proper installation. This elimi- nates the chance of the O-ring being caught in, or damaged by, the mating part. The sealing direction of the O-ring is now set vertically in relation to the contacting surface of the mating part to improve sealing charac- teristics. • O-rings facilitate piping connections because the reaction force of the O-ring will not occur in the direction that causes the joint to pull out. O-RING AND REFRIGERANT CONNECTION WARNING: WJIA1994E 1. Plug 2. O-ring A. Torque wrench B. Apply oil C. Do not apply oil to thread D. No good E. Good SJIA0697E Revision: July 2011 2012 Versa Sedan PRECAUTIONS HA-5 < PRECAUTION > C D E F G H J K L M A B HA N O P Make sure 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: The new and former refrigerant connections use different O-ring configurations. Do not confuse O- rings, since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at, or around, the connection. O-Ring Specifications* * : Always check with the parts department for the latest parts information. CAUTION: When replacing or cleaning refrigerant cycle components, observe the following: • When the compressor is removed, store it in the same position as it is when installed on the vehicle. Doing so will cause oil to enter the low-pressure chamber. • When connecting pipes, always use a torque wrench and a back-up wrench. • After disconnecting pipes, immediately plug all openings to prevent entry of dirt and moisture. • When installing an air conditioner in the vehicle, connect the pipes as the final stage of the opera- tion. Do not remove the seal caps of pipes and other components until just before required for con- nection. • 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. • Thoroughly remove moisture from the refrigeration system before charging the refrigerant. • Do not reuse O-rings. • O-ring must be installed near the dented portion of pipe. • When replacing the O-ring, be careful not to damage O-ring and pipe. • Connect tube until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that the O-ring is installed to pipe correctly. • After connecting pipe, perform leak test and make sure that there is no leakage from connections. When the refrigerant leaking point is found, disconnect that line and replace the O-ring. Then tighten connections of seal seat to the specified torque. Precautions For Refrigerant System Service INFOID:0000000007207514 GENERAL REFRIGERANT PRECAUTION WARNING: • Never breathe A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat. Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. Ventilate work area before resuming service if accidental system discharge occurs. Additional health and safety information may be obtained from refrigerant and oil 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). Connection type Piping connection point QTY O-ring size New Condenser to high-pressure flexible hose 1 12 Condenser to high-pressure pipe 1 8 Low-pressure flexible hose to expansion valve 1 16 High-pressure pipe to expansion valve 1 8 Compressor to low-pressure flexible hose 1 19 Compressor to high-pressure flexible hose 1 12 Liquid tank to condenser pipe Inlet 1 8 Outlet 1 Former Refrigerant pressure sensor to condenser 1 10 Expansion valve to evaporator Inlet 2 12 Outlet 2 16 Revision: July 2011 2012 Versa Sedan HA-6 < PRECAUTION > PRECAUTIONS • Never heat a refrigerant container with an open flame; place the bottom of the container in a pail of warm 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. These refrigerants must never be mixed, even in the smallest amounts. Compressor malfunction is likely to occur if the refrigerants are mixed. • Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. Compressor malfunction is likely to occur if oil other than that specified is used. • The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following 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. - Use only the specified oil from a sealed container. Reseal containers of oil immediately. Oil becomes moisture saturated and should not be used without proper sealing. - Never allow oil (A/C System Oil Type R) to come in contact with styrene foam parts. Damage may result. Precaution for Service of Compressor • Plug all openings to prevent moisture and foreign matter from entering. • When the compressor is removed, store it in the same position as it is when mounted on the vehicle. • When replacing or repairing compressor, follow “Maintenance of Oil Level” exactly. Refer to HA-20, "Description". • Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with oil, wipe it off using a clean waste cloth moistened with thinner. • After compressor service operation, turn the compressor shaft by hand more than 5 turns in both directions. This will equally distribute oil inside the compressor. After the compressor is installed, let the engine idle and operate the compressor for 1 hour. LEAK DETECTION DYE CAUTION: • The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet (UV) lamp is required to illuminate the dye when inspecting for leaks. • Always wear fluorescence enhancing UV safety goggles to protect eyes and enhance the visibility of the fluorescent dye. • The fluorescent dye leak detector is not a replacement for an electrical leak detector. The fluorescent dye leak detector should be used in conjunction with an electrical leak detector to pin-point refriger- ant leakages. • Read and follow all manufacturer’s operating instructions and precautions prior to performing the work for the purpose of safety and customer’s satisfaction. • A compressor shaft seal should not necessarily be repaired because of dye seepage. The compres- sor shaft seal should only be repaired after confirming the leak with an electrical leak detector. • Always remove any remaining dye from the leakage area after repairs are completed to avoid a mis- diagnosis during a future service. • Never allow dye to come into contact with painted body panels or interior components. Clean imme- diately with the approved dye cleaner if dye is spilled. Fluorescent dye left on a surface for an extended period of time cannot be removed. • Never spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.). Revision: July 2011 2012 Versa Sedan PRECAUTIONS HA-7 < PRECAUTION > C D E F G H J K L M A B HA N O P • Never use more than one refrigerant dye bottle [1/4 ounce (7.4 cc)] per A/C system. • Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Never use HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C system, or CFC-12 (R-12) leak detection dye in HFC-134a (R-134a) A/C system, or A/C system damage may result. • The fluorescent properties of the dye remain for three or more years unless a compressor malfunc- tion occurs. NOTE: Identification • Vehicles with factory installed fluorescent dye have a green label. • Vehicles without factory installed fluorescent dye have a blue label. Service Equipment INFOID:0000000007207515 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. ELECTRICAL LEAK DETECTOR Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance. 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 oils. SERVICE HOSES Be certain that the service hoses display the markings described (colored hose with black stripe). All hoses must have positive shut- off devices (either manual or automatic) near the end of the hoses opposite to the manifold gauge. SERVICE COUPLERS 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. If an improper connection is attempted, discharging and contamination may occur. CHARGING CYLINDER SHA533D RHA272D Shut-off valve rotation A/C service valve Clockwise Open Counterclockwise Close RHA273D Revision: July 2011 2012 Versa Sedan HA-8 < PRECAUTION > PRECAUTIONS 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. Revision: July 2011 2012 Versa Sedan PREPARATION HA-9 < PREPARATION > C D E F G H J K L M A B HA N O P PREPARATION PREPARATION Special Service Tool INFOID:0000000007631238 The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here. HFC-134a (R-134a) Service Tool and Equipment INFOID:0000000007631239 Never mix HFC-134a (R-134a) refrigerant and/or its specified oil with CFC-12 (R-12) refrigerant and/or its oil. Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/oil. Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles refrigerant and/or oil) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid mixed use of the refrigerants/oil. Adapters that convert one size fitting to another must never be used; refrigerant/oil contamination will occur and compressor failure will result. Tool number (Kent-Moore No.) Tool name Description — (J-41425-NIS) Aluminum tube repair kit Repairing leaks in A/C tubes — (J-38873-A) Drive plate installer Installing pulley and drive plate ALIIA0390ZZ WJIA0367E Tool number (Kent-Moore No.) Tool name Description HFC-134a (R-134a) (—) Refrigerant Container color: Light blue Container marking: HFC-134a (R- 134a) Fitting size: Thread size • large container 1/2”-16 ACME — (—) NISSAN A/C System Oil Type R Type: Poly alkylene glycol oil (PAG), type R Application: HFC-134a (R-134a) vane rotary compressors (NISSAN only) Lubricity: 40 m (1.4 US fl oz, 1.4 Imp fl oz) S-NT196 S-NT197 Revision: July 2011 2012 Versa Sedan HA-10 < PREPARATION > PREPARATION — (J-48710) Nissan ACR2009 RRR Unit Refrigerant Recovery, Recycling and Recharging — (J-43926) A/C leak detection kit Kit includes: (J-42220) UV lamp and UV safety goggles (J-41459) Refrigerant dye injector (J-41447) Fluorescent leak detection dye (box of 24, 1/4 ounce bottles) (J-43872) Refrigerant dye cleaner Power supply: • DC 12V (battery terminal) Service hoses: • High side hose (J-39500-72B) • Low side hose (J-39500-72R) • Utility hose (J-39500-72Y) Hose color: • Low side hose: Blue with black stripe • High 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 Service couplers • High side coupler (J-39500-20A) • Low side coupler (J-39500-24A) Hose fitting to service hose: • M14 x 1.5 fitting is optional or perma- nently attached. — (J-39699) Refrigerant weight scale For measuring of refrigerant Fitting size-Thread size • 1/2”-16 ACME — (J-39649) Vacuum pump (Including the isolator valve) Capacity: • Air displacement: 4 CFM • Micron rating: 20 microns • Oil capacity: 482 g (17 oz) Fitting size-Thread size • 1/2”-16 ACME Tool number (Kent-Moore No.) Tool name Description WJIA0293E ZHA200H S-NT201 S-NT202 S-NT200 S-NT203 Revision: July 2011 2012 Versa Sedan [...]... Abnormal Pressure HA- 25 Low-pressure side sometimes becomes negative Go to Trouble Diagnosis Procedure for Abnormal Pressure HA- 25 Low-pressure side becomes negative Go to Trouble Diagnosis Procedure for Abnormal Pressure HA- 25 Revision: July 2011 HA- 24 HAC-27 HA- 14 HA- 27 HAC-34 2012 Versa Sedan REFRIGERATION SYSTEM SYMPTOMS < SYMPTOM DIAGNOSIS > REFRIGERATION SYSTEM SYMPTOMS A Trouble Diagnosis For Unusual... A/C system operates normally 7 Disconnect recovery/recycling/recharging equipment (Collect the refrigerant from the high-pressure hose and low-pressure hose of recovery/recycling/recharging equipment.) 8 Install A/C service valve cap 9 Refrigerant charge is complete A B C D E F G H HA J K L M N O P Revision: July 2011 HA- 19 2012 Versa Sedan OIL < BASIC INSPECTION > OIL Description INFOID:0000000007207528... Self-diagnosis Function Air outlet does not change Go to Adjustment Procedure for Mode Door HAC-50 Discharge air temperature does not change Go to Adjustment Procedure for Air Mix Door HAC-51 Intake door does not change Go to Adjustment Procedure for Intake Door HAC-49 Front blower motor operation is malfunctioning Go to Trouble Diagnosis Procedure for Front Blower Motor HAC-35 Magnet clutch does not engage... 2011 HA- 13 2012 Versa Sedan DIAGNOSIS AND REPAIR WORKFLOW < BASIC INSPECTION > BASIC INSPECTION DIAGNOSIS AND REPAIR WORKFLOW Workflow INFOID:0000000007629504 OVERALL SEQUENCE ALIIA0440GB DETAILED FLOW 1.INTERVIEW CUSTOMER Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurred Revision: July 2011 HA- 14 2012 Versa Sedan. .. level, charge A/C system with approximately 200 g (0.4 lb) refrigerant and check that there is no refrigerant leakage Refer to HA- 16, "Leak Test" CAUTION: Check the airtightness for 15 minutes or more if the parts are replaced 4 If parts other than compressor are replaced, fill compressor lubricant according to parts that are replaced 5 Charge the specified amount of refrigerant to A/C system 6 Check that... recovery/recycling/recharging equipment to the A/C service valve Revision: July 2011 HA- 18 2012 Versa Sedan REFRIGERANT < BASIC INSPECTION > 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 the parts are replaced 3 Check the airtightness of A/C system for 25 minutes or more If pressure rises more than the specified... return operation Refer to HA- 20, "Perform Oil Return Operation" REMOVAL 1 2 Use refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant Refer to HA- 18, "Recycle Refrigerant" Remove the high and low-pressure flexible hose bolts, and then disconnect low-pressure flexible hose and high-pressure flexible hose from the compressor Revision: July 2011 HA- 28 2012 Versa Sedan COMPRESSOR < REMOVAL... reuse O-rings • Apply A/C oil to the O-ring of the high-pressure pipe for installation • After charging the A/C refrigerant, check for leaks Refer to HA- 16, "Leak Test" Revision: July 2011 HA- 32 2012 Versa Sedan CONDENSER < REMOVAL AND INSTALLATION > CONDENSER A Exploded View INFOID:0000000007207545 B C D E F G H HA AWIIA1460GB 1 Condenser 2 Refrigerant pressure sensor 3 O-ring 4 O-ring 5 Liquid tank bracket... reuse O-rings • Apply A/C oil to the O-rings of the high-pressure pipe and refrigerant pressure sensor for installation • After charging the A/C refrigerant, check for leaks Refer to HA- 16, "Leak Test" A B C D E F G H HA J K L M N O P Revision: July 2011 HA- 35 2012 Versa Sedan A/C UNIT ASSEMBLY < REMOVAL AND INSTALLATION > A/C UNIT ASSEMBLY Exploded View INFOID:0000000007207549 REMOVAL AWIIA1457GB... Perform the operation check Refer to HAC-27, "Work Procedure" Does it operate normally? YES >> Inspection End NO >> GO TO 2 N O P Revision: July 2011 HA- 15 2012 Versa Sedan REFRIGERANT < BASIC INSPECTION > REFRIGERANT Description INFOID:0000000007207524 CONNECTION OF SERVICE TOOLS AND EQUIPMENT JSIIA0258ZZ 1 Shut-off valve 2 A/C service valve 3 Recovery/recycling/recharging equipment 4 Vacuum pump 5 Manifold . US fl oz, 1.4 Imp fl oz) S-NT196 S-NT197 Revision: July 2011 2012 Versa Sedan HA-10 < PREPARATION > PREPARATION — (J-48710) Nissan ACR2009 RRR Unit Refrigerant Recovery, Recycling and Recharging — (J-43926) A/C. DATA AND SPECIFICATIONS (SDS) 40 Compressor 40 Oil 40 Refrigerant 40 Revision: July 2011 2012 Versa Sedan PRECAUTIONS HA-3 < PRECAUTION > C D E F G H J K L M A B HA N O P PRECAUTION PRECAUTIONS Precaution. Expansion valve to evaporator • Refrigerant pressure sensor to condenser Revision: July 2011 2012 Versa Sedan HA-4 < PRECAUTION > PRECAUTIONS FEATURES OF NEW TYPE REFRIGERANT CONNECTION •