Mitsubishi Electronics PUY-A36NHA2-BS, PUZ-A42NHA2-BS, PUZ-A30NHA2, PUZ-A18NHA2-BS, PUZ-A36NHA2 R22

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3Tools for R410A (The

2-3. CAUTIONS FOR REFRIGERANT PIPING WORK

New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.

1Thickness of pipes

Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7mm [7/256 inch] or below.)

Diagram below: Piping diameter and thickness

Nominal

Outside

Thickness : mm [inch]

dimensions[inch]

diameter (mm)

R410A

R22

1/4

6.35

0.8 [1/32]

0.8 [1/32]

3/8

9.52

0.8 [1/32]

0.8 [1/32]

1/2

12.70

0.8 [1/32]

0.8 [1/32]

5/8

15.88

1.0 [5/128]

1.0 [5/128]

3/4

19.05

—

1.0 [5/128]

2Dimensions of flare cutting and flare nut

The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because of its working pressure is higher than that of other refrigerants. Therefore, to enhance air tightness and intensity, flare cutting dimension of copper pipe for R410A has been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has partly been changed to increase intensity as shown below. Set copper pipe correctly referring to cop- per pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes.

Use torque wrench corresponding to each dimension.

Dimension A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimension B

 

 

Flare cutting dimensions

 

Unit : mm [inch] Flare nut dimensions

 

 

Unit : mm [inch]

Nominal

Outside

 

Dimension A ( -+00.4)

 

Nominal

 

Outside

 

Dimension B

dimensions[inch]

diameter

 

R410A

R22

 

dimensions[inch]

 

diameter

R410A

R22

1/4

6.35

9.1

[11/32-23/64]

9.0

 

1/4

 

6.35

17.0

[43/64]

17.0

3/8

9.52

13.2

[1/2-33/64]

13.0

 

3/8

 

9.52

22.0

[7/8]

22.0

1/2

12.70

16.6

[41/64-21/32]

16.2

 

1/2

 

12.70

26.0

[1-3/64]

24.0

5/8

15.88

19.7

[49/64-25/32]

19.4

 

5/8

 

15.88

29.0

[1-9/64]

27.0

3/4

19.05

 

—

23.3

 

3/4

 

19.05

 

—

36.0

following table shows whether conventional tools can be used or not.)

Tools and materials

Use

R410A tools

Can R22 tools be used?

Gauge manifold

Air purge, refrigerant charge

Tool exclusive for R410A

 

Charge hose

and operation check

Tool exclusive for R410A

 

Gas leak detector

Gas leak check

Tool for HFC refrigerant

 

Refrigerant recovery equipment

Collection of refrigerant

Tool exclusive for R410A

 

Refrigerant cylinder

Refrigerant charge

Tool exclusive for R410A

 

Applied oil

Apply to flared section

Ester oil, ether oil and

 

 

 

alkylbenzene oil(minimum amount)

 

Safety charger

Prevent compressor malfunction

Tool exclusive for R410A

 

 

when charging refrigerant by

 

 

 

spraying liquid refrigerant

 

 

Charge valve

Prevent gas from blowing out

Tool exclusive for R410A

 

 

when detaching charge hose

 

 

Vacuum pump

Vacuum drying and air

Tools for other refrigerants can

(Usable if equipped

 

purge

be used if equipped with adop-

with adopter for rever-

 

 

ter for reverse flow check

se flow)

Flare tool

Flaring work of piping

Tools for other refrigerants

(Usable by adjusting

 

 

can be used by adjusting

flaring dimension)

 

 

flaring dimension

 

Bender

Bend the pipes

Tools can be used for other refrigerants

 

Pipe cutter

Cut the pipes

Tools can be used for other refrigerants

 

Welder and nitrogen gas cylinder

Weld the pipes

Tools can be used for other refrigerants

 

Refrigerant charging scale

Refrigerant charge

Tools can be used for other refrigerants

 

Vacuum gauge or thermis-

Check the degree of vacuum. (Vacuum

Tools can be used for other

 

tor vacuum gauge and

valve prevents back flow of oil and refri-

refrigerants

 

vacuum valve

gerant to thermistor vacuum gauge)

 

 

Charging cylinder

Refrigerant charge

Tool exclusive for R410A

 

:Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)

:Tools for other refrigerants can be used under certain conditions.

:Tools for other refrigerants can be used.

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Contents Parts Catalog OCB429 ContentsIndoor Unit Reference ManualAlways Observe for Safety Safety PrecautionAdditional refrigerant charge When charging directly from cylinderR22 PUZ-A42NHA2 PUZ-A42NHA2-BS PUY-A42NHA2 PUY-A42NHA2-BS FeaturesPUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS PUZ-A18NHA2 PUZ-A24NHA2 PUZ-A30NHA2 PUZ-A36NHA2 PUZ-A42NHA2 SpecificationsPUY-A18NHA2-BS PUY-A24NHA2-BS Data Compressor Technical DataPUZ-A18NHA2-BS Noise Criterion CurvesHeat pump Standard Operation DataPKA-A12GA PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BA Cooling onlyUnit mminch Outdoor UnitExample of Notes 662-5/8 Air outlet Service SpaceNET Adapter Wiring DiagramNET Adapter PUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BSWUse copper supply wires TABU/V/W System Simultaneous twin system Wiring SpecificationsOFF Separate Indoor UNIT/OUTDOOR Unit Power SuppliesIndoor Outdoor Connecting Cable Refrigerant address NET address Control Remote Controller NET Wiring MethodRefrigerant address setting NET address settingRegulations in address settings NET wiringPUZ-A18NHA2 PUZ-A18NHA2-BS Refrigerant System DiagramPUZ-A42NHA2 PUZ-A42NHA2-BS Way valve solenoid coil Heating on Cooling OFFPUY-A42NHA2 PUY-A42NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BSStart and finish of test run Refrigerant recovering pump downTroubleshooting TroubleshootingCheck Point Under Test RUN Before test runContents of inferior phenomena Operating proceduresSymptoms in test run mode Cause Remote Controller Display Test run for wireless remote controller Self-Diagnosis During Maintenance or Service HOW to Proceed SELF-DIAGNOSISWhen a Problem Occurs During Operation ON/OFF Remote Controller DiagnosisMalfunction-diagnosis method at maintenance service Malfunction-diagnosis method by wireless remote controllerProcedure Case of trouble during operationU9,UH 63L connector open Error Code Abnormal point and detection method CaseSELF-DIAGNOSIS Action Table CndcCase Judgment and action 63H connector open Error CodeConnector open Indoor/outdoor unit connectorHigh discharging temperature Case Judgment and action High pressure High-pressure switchAbnormalities detected while unit is operating 63H workedTemperature of heatsink Temperature thermistor TH4Power module Case Judgment and action Open/short circuit of dischargeWhen compressor locked Synchronous signal to main circuitCurrent sensor error Case Judgment and action Outdoor fan motorErrorE0/signal receiving errorE4 Remote controller transmissionRemote controller control board Case Judgment and action Low pressure 63L workedErrorE3/signal receiving errorE5 Case Judgment and action Remote controller transmissionError Signal receiving error Non defined error codeCase Judgment and action Pipe temperature NET communication errorHardware error of transmission Case Judgment and action Address duplicate definitionTo the next Fresh Master From the previousMaster LossnayPhenomena Factor Countermeasure Troubleshooting by Inferior PhenomenaVCTF, VCTFK, CVV CVS, VVR, VVF, VCT Melans YES Please WaitPower supply To the outdoor unit Check the breaker Outdoor power circuit boardOutdoor connecting wire Miswiring, breakingDefective indoor Replace the indoor Power board Indoor/outdoor connecting wire BlinkingNot lighting Breaking or poor Fix the breaking or poorCheck if there is breaking Action Table Before repair Frequent calling from customersSometimes This is the sound which is heard when the flow Phone Calls From Customers How to RespondRefrigerant in the air conditioner is switched This is not a malfunctionThere might be a case that With Blower…With Airflow Direction… Page HOW to Check the Parts Power supply check Remove the connector CNF1 Wiring contact checkFuse check ENDThermistor feature chart Low temperature thermistors HOW to Check the ComponentsMedium temperature thermistor High temperature thermistorLinear expansion valve operation Output pulse signal and the valve operationOperation summary of the linear expansion valve Linear expansion valve A24, 30, 36 How to attach the coil How to detach the coilBe sure to attach the stopper Emergency Operation Emergency operation procedureReleasing emergency operation SW4Operation data during emergency operation Test Point Diagram CNAC1, CNAC2 LI, NICN5 LO, noPUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BS RS1 DIP-PFC LD1-LD2DIP-IPM CN3 CN4 CN5CN3 CnafTABP2/SC-P2 ActmL1, L2 Upper sideLower side Function of switches Function of SWITCHES, Connectors and JumpersFunction Action by the switch operation Effective timing OFFSW9 2Function of connector75% Special function50% Display function of inspection for outdoor unit 1Check the outdoor fan motor 1Check if stop valves are open Blinking Abnormality of outdoor fan Motor rotational speedDigital indicator LED1 working details Operation indicator~9999 When it is 100 hours or more, hundreds digit, tens Example When 42500 times 425 100 times Secs 5secsExample When 2450 hours 245 10 hours Lighting Cancellation of postponementSW2 setting Display detail Explanation for display Unit Single phase 2 3 phase Outdoor unit setting informationUnit Cooling onlyDegF Fan step on error occurring ~10 Step Example When 130 pulse Secs Sub cool on error occurring. SC ~234 0~130degC Discharge superheat on error occurring ~327 0~182degC SHdExample When 415 minutes Minute Secs U9 Error status during the ErrorLED Rise of discharge temperatureMaintenance Mode Operation Method Easy Maintenance FunctionSwitching to maintenance mode Fixed Hz operationTo check the data for each item, repeat steps 5 to Data measurementGuide for Operation Condition Unit Function Setting by the Remote Controller Function SettingData of the sensor Ta=C On main remote Controller Average data Initial Ta=A+B/2 Sensor on allPLA-BA PCA-GA Mode No.11Setting No Settings For modes 15 and higher Selecting functions using the wired remote controllerSpecified indoor unit Press E FAN operationOperating Procedure Operating instructions Flow of function selection procedureMode Selection Function Selection of Remote ControllerFunction selection flowchart FAN Mode VaneCheck button for 3 seconds to return to maintenance mode Button for 3 seconds to switch to Maintenance monitorTurn on the Monitoring the operation data PressRequest Code List Outdoor unit-Control state Code Description For indoor fan pulsation control 100101 Detail Contents in Request Code102 Error content U9 Request codeFan control state Request code Actuator output state Request codeOutdoor unit Setting information Request code Outdoor unit --Capacity setting display Request code103 Contact demand capacity Request code104 Indoor unit Capacity setting information Request code Indoor unit Model setting information Request code105 Data display See the table on the rightPUZ-A18NHA2 PUZ-A18NHA2-BS Operating Procedure Photos Disassembly Procedure106 Photo107 Removing the thermistor Outdoor 2-phase pipe TH6Removing the electrical parts box Thermistor Outdoor pipe TH3108 Operating Procedure PhotosRemoving linear expansion valve 109Removing the 4-way valve 110 Separator Recover refrigerantRemoving the compressor MC Removing the accumulatorRemoving the service panel and top panel Operating Procedure Photos & Illustration111 Removing the fan motor MF1Thermistor Discharge TH4 112Removing the thermistor Outdoor pipe TH3 Removing the 4-way valve coil 113Removing the linear expansion valve coil Removing the bypass valve coilRemoving the reactor ACLA24 114Removing the bypass valve Remove 2 receiver leg fixing screws 4 115Removing the reactor DCL A30 Removing the fan motor MF1, MF2 116Remove the top panel. See figure Controller Remove the service panel. See figure Outdoor pipe117 Are not oxidized 118Linear expansion Coil Valve coil119 Low pressure switch 63LRemoving the reactor DCL and capacitor CE DCLRemove 2 back cover panel fixing screws 5 10

PUZ-A36NHA2-BS, PUY-A12NHA2, PUY-A42NHA2-BS, PUY-A30NHA2, PUZ-A36NHA2 specifications

Mitsubishi Electronics has long been a leader in the HVAC industry, and their range of air conditioning units, including the PUY-A24NHA2, PUZ-A24NHA2, PUY-A24NHA2-BS, PUZ-A42NHA2-BS, and PUY-A42NHA2, exemplifies their commitment to innovation and energy efficiency. These models are designed to provide optimal climate control for both residential and commercial applications, ensuring comfort throughout the year.

One of the defining features of these models is their advanced inverter technology, which allows for precise temperature control and reduced energy consumption. The inverter technology adjusts the compressor speed according to the cooling load, significantly lowering operating costs compared to traditional fixed-speed systems. This means that users can enjoy consistent comfort without worrying about surging energy bills.

The PUY and PUZ units come equipped with powerful indoor and outdoor components that enable efficient heat exchange. These systems provide excellent performance even in extreme weather conditions, with reliable operation at low ambient temperatures. This capability ensures that you can maintain a comfortable environment, no matter the season.

Additionally, the models are designed with quiet operation in mind. The outdoor units incorporate noise-reduction technology, ensuring that the systems operate at minimal sound levels. This is especially beneficial for residential areas or office environments, where maintaining a peaceful atmosphere is crucial.

Mitsubishi Electronics has also integrated smart technology into these units. With options for remote control via Wi-Fi, users can manage their air conditioning settings from anywhere, using their smartphones or tablets. This integration enhances user convenience and allows for more efficient scheduling and energy management.

These models are also known for their environmentally friendly refrigerants, such as R410A, which contribute to lower global warming potential and align with modern sustainability practices. By choosing Mitsubishi's PUY and PUZ series, consumers not only prioritize their comfort but also contribute to environmental conservation.

In summary, the Mitsubishi Electronics PUY-A24NHA2, PUZ-A24NHA2, PUY-A24NHA2-BS, PUZ-A42NHA2-BS, and PUY-A42NHA2 air conditioning units are equipped with cutting-edge technology, offering energy efficiency, quiet operation, and smart functionality. Whether for residential or commercial use, these units are designed to meet the demands of modern climate control while prioritizing energy savings and sustainability.
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