Mitsubishi Electronics PUY-A36NHA2-BS Not lighting, Indoor/outdoor connecting wire Blinking

Page 49

Symptoms: Nothing is displayed on the remote controller 2

LED display of the indoor controller board

LED1 : LED2 :

LED3 : or

Diagnosis flow

Cause

Inspection method and

troubleshooting

 

 

Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit.

AC 187V to AC 253V?

NO

 

YES

 

Check the status

Not lighting.

of the indoor controller

 

board LED3 display.

Check the looseness or disconnection

 

of the indoor/outdoor connecting wire.

Blinking

Are there looseness or

YES

 

disconnection of the indoor/

 

• Breaking or poor

• Fix the breaking or poor

outdoor connecting wire?

 

contact of the indoor/

contact of the indoor/outdoor

 

 

 

NO

 

outdoor connecting

connecting wire.

 

wire

 

 

 

 

 

Check the refrigerant address of the outdoor unit. (SW1-3 to 1-6)

Is the refrigerant

 

NO

• Normal

• Set the refrigerant

address “0”?

 

 

 

 

Only the unit which

address to “0”. In case of

 

 

 

 

YES

 

 

has the refrigerant

the multiple grouping

Check the LED display of the

 

 

address “0” supplies

system, recheck the

 

 

power to the remote

refrigerant address again.

outdoor unit after turning on the

 

main power again.

 

 

controller.

 

Is anything displayed?

 

Not displayed.

• Defective outdoor

• Replace the outdoor

 

 

 

 

 

 

 

controller circuit

controller circuit board.

Displayed.

 

 

board

 

Is “EA” or “Eb”

NO

 

 

 

 

displayed?

 

 

 

 

 

YES

 

Is “E8” displayed?

YES

• Defective outdoor

• Replace the outdoor

 

 

 

 

 

 

 

controller circuit

controller circuit board.

 

 

NO

 

board

 

 

 

Can the unit be restarted?

 

 

 

 

 

Can all the indoor

NO

• Defective indoor

• Replace the indoor controller

 

 

unit be operated?

 

controller board

board of the indoor unit which

 

 

 

 

Check the voltage between S2

YES

 

 

doesn’t operate.

and S3 on the terminal block of

 

 

• Influence of

• Not abnormal.

the outdoor unit.

 

 

 

electromagnetic noise

There may be the influence

 

 

 

 

 

 

 

 

 

of electromagnetic noise.

 

 

 

 

 

Check the transmission wire

 

 

 

 

 

and get rid of the causes.

DC 17V to DC 28V?

NO

 

 

• Defective outdoor

• Replace the outdoor

 

 

 

 

 

 

 

power circuit board

power circuit board.

YES

 

 

 

• Defective indoor

• Replace the indoor

 

 

 

 

 

 

 

 

power board

power board.

49

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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-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS FeaturesPUZ-A42NHA2 PUZ-A42NHA2-BS PUY-A42NHA2 PUY-A42NHA2-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 runSymptoms in test run mode Cause Remote Controller Display Operating proceduresContents of inferior phenomena Test run for wireless remote controller When a Problem Occurs During Operation HOW to Proceed SELF-DIAGNOSISSelf-Diagnosis During Maintenance or Service 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 LossnayVCTF, VCTFK, CVV CVS, VVR, VVF, VCT Troubleshooting by Inferior PhenomenaPhenomena Factor Countermeasure 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 malfunctionWith Airflow Direction… With Blower…There might be a case that 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 thermistorOperation summary of the linear expansion valve Output pulse signal and the valve operationLinear expansion valve operation 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 ActmLower side Upper sideL1, L2 Function of switches Function of SWITCHES, Connectors and JumpersFunction Action by the switch operation Effective timing OFFSW9 2Function of connector50% Special function75% 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 allSetting No Settings Mode No.11PLA-BA PCA-GA 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 the 4-way valve 109Removing linear expansion 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 MF1Removing the thermistor Outdoor pipe TH3 112Thermistor Discharge TH4 Removing the 4-way valve coil 113Removing the linear expansion valve coil Removing the bypass valve coilRemoving the bypass valve 114Removing the reactor ACLA24 Removing the reactor DCL A30 115Remove 2 receiver leg fixing screws 4 Removing the fan motor MF1, MF2 116117 Remove the service panel. See figure Outdoor pipeRemove the top panel. See figure Controller 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.

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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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