Mitsubishi Electronics PUY-A30NHA2 Blinking Abnormality of outdoor fan Motor rotational speed

Page 75

Indication

Outdoor controller board

Contents

LED1 (Green) LED2 (Red)

3 blinking 1 blinking Abnormality of shell thermostat and discharging temperature (TH4)

2 blinking Abnormal high pressure (High pressure switch 63H worked.)

 

Error

Error

Inspection method

code

w1

 

U2

1Check if stop valves are open.

 

2Check if connectors (TH4, LEV-A) on outdoor controller board are not

 

disconnected.

 

3Check if unit is filled with specified amount of refrigerant.

 

4Measure resistance values among terminals on indoor valve and outdoor linear

 

expansion valve using a tester.

U1

1Check if indoor/outdoor units have a short cycle on their air ducts.

 

2Check if connector (63H) on outdoor controller board is not disconnected.

3Check if heat exchanger and filter is not dirty.

4Measure resistance values among terminals on linear expansion valve using a tester.

Detailed

reference

page

P.37

P.37

3 blinking Abnormality of outdoor fan

U8

motor rotational speed

 

4 blinking Compressor overcurrent breaking (Start-up locked)

UF

Compressor overcurrent breaking

UP

Abnormality of current sensor (P.B.)

UH

Abnormality of power module

U6

5 blinking Open/short of discharge thermistor (TH4)

U3

Open/short of outdoor thermistors

U4

(TH3, TH6, TH7 and TH8)

 

6 blinking Abnormality of heatsink

U5

temperature

 

7 blinking Abnormality of voltage

U9

1Check the outdoor fan motor.

1Check if stop valves are open.

2Check looseness, disconnection, and converse connection of compressor wiring. 3Measure resistance values among terminals on compressor using a tester.

4Check if outdoor unit has a short cycle on its air duct.

1Check if connectors (TH3, TH4, TH6 and TH7) on outdoor controller board and conn- ector (CN3) on outdoor power board are not disconnected.

2Measure resistance value of outdoor thermistors.

1Check if indoor/outdoor units have a short cycle on their air ducts. 2Measure resistance value of outdoor thermistor(TH8).

1Check looseness, disconnection, and converse connection of compressor wiring. 2Measure resistance value among terminals on compressor using a tester.

3Check the continuity of contactor (52C).

4Check if power supply voltage decreases.

5Check the wiring of CN52C.

6Check the wiring of CNAF.

P.39

P.39

P.40

P.39

P.38

P.38

P.38

P.38

P.39

4 blinking 1 blinking Abnormality of room temperature thermistor (TH1) Abnormality of pipe temperature thermistor /Liquid (TH2) Abnormality of pipe temperature thermistor/Condenser-Evaporator(TH5)

2 blinking Abnormality of drain sensor (DS) Float switch connector open(FS) Indoor drain overflow protection

3 blinking Freezing (cooling)/overheating

(heating) protection

4 blinking Abnormality of pipe temperature

5 blinking Abnormality of indoor con- troller board

–– Abnormality of remote con- troller board

W1 Error code displayed on remote controller W2 Refer to service manual for indoor unit.

P1

P2

P9

P4

P5

P6

P8

Fb

E1

E2

1Check if connectors (CN20, CN21, CN29, and CN44) on indoor controller board are not disconnected.

2Measure resistance value of indoor thermistors.

1Check if connector (CN31)(CN4F) on indoor controller board is not disconnected. 2Measure resistance value of indoor thermistors.

3Measure resistance value among terminals on drain-up machine using a tester.

4Check if drain-up machine works.

5Check drain function.

1Check if indoor unit has a short cycle on its air duct.

2Check if heat exchanger and filter is not dirty.

3Measure resistance value on indoor and outdoor fan motors.

4Check if the inside of refrigerant piping is not clogged.

1Check if indoor thermistors (TH2 and TH5) are not disconnected from holder. 2Check if stop valve is open.

3Check converse connection of extension pipe. (on plural units connection)

4Check if indoor/outdoor connecting wire is connected correctly. (on plural units connection)

1Replace indoor controller board.

1Replace remote controller.

W2

W2

W2

W2

W2

W2

w2

P.40

75

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Contents Parts Catalog OCB429 ContentsIndoor Unit Reference ManualAlways Observe for Safety Safety PrecautionAdditional refrigerant charge When charging directly from cylinderR22 Features PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BSPUZ-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 MethodNET wiring NET address settingRefrigerant address setting Regulations in address settingsWay valve solenoid coil Heating on Cooling OFF Refrigerant System DiagramPUZ-A18NHA2 PUZ-A18NHA2-BS PUZ-A42NHA2 PUZ-A42NHA2-BSPUY-A42NHA2 PUY-A42NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BSStart and finish of test run Refrigerant recovering pump downBefore test run TroubleshootingTroubleshooting Check Point Under Test RUNOperating procedures Symptoms in test run mode Cause Remote Controller DisplayContents of inferior phenomena Test run for wireless remote controller HOW to Proceed SELF-DIAGNOSIS When a Problem Occurs During OperationSelf-Diagnosis During Maintenance or Service ON/OFF Remote Controller DiagnosisCase of trouble during operation Malfunction-diagnosis method by wireless remote controllerMalfunction-diagnosis method at maintenance service ProcedureU9,UH Cndc Error Code Abnormal point and detection method Case63L connector open SELF-DIAGNOSIS Action TableIndoor/outdoor unit connector Error CodeCase Judgment and action 63H connector open Connector open63H worked Case Judgment and action High pressure High-pressure switchHigh discharging temperature Abnormalities detected while unit is operatingCase Judgment and action Open/short circuit of discharge Temperature thermistor TH4Temperature of heatsink Power moduleCase Judgment and action Outdoor fan motor Synchronous signal to main circuitWhen compressor locked Current sensor errorCase Judgment and action Low pressure 63L worked Remote controller transmissionErrorE0/signal receiving errorE4 Remote controller control boardNon defined error code Case Judgment and action Remote controller transmissionErrorE3/signal receiving errorE5 Error Signal receiving errorCase Judgment and action Address duplicate definition NET communication errorCase Judgment and action Pipe temperature Hardware error of transmissionTo the next Lossnay From the previousFresh Master MasterTroubleshooting by Inferior Phenomena VCTF, VCTFK, CVV CVS, VVR, VVF, VCTPhenomena Factor Countermeasure Melans YES Please WaitMiswiring, breaking Outdoor power circuit boardPower supply To the outdoor unit Check the breaker Outdoor connecting wireBreaking or poor Fix the breaking or poor Indoor/outdoor connecting wire BlinkingDefective indoor Replace the indoor Power board Not lightingCheck if there is breaking Action Table Before repair Frequent calling from customersThis is not a malfunction Phone Calls From Customers How to RespondSometimes This is the sound which is heard when the flow Refrigerant in the air conditioner is switchedWith Blower… With Airflow Direction…There might be a case that Page HOW to Check the Parts END Wiring contact checkPower supply check Remove the connector CNF1 Fuse checkHigh temperature thermistor HOW to Check the ComponentsThermistor feature chart Low temperature thermistors Medium temperature thermistorOutput pulse signal and the valve operation Operation summary of the linear expansion valveLinear expansion valve operation Linear expansion valve A24, 30, 36 How to attach the coil How to detach the coilBe sure to attach the stopper SW4 Emergency operation procedureEmergency Operation Releasing emergency operationOperation data during emergency operation Test Point Diagram LO, no LI, NICNAC1, CNAC2 CN5PUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BS RS1 CN3 CN4 CN5 LD1-LD2DIP-PFC DIP-IPMActm CnafCN3 TABP2/SC-P2Upper side Lower sideL1, L2 OFF Function of SWITCHES, Connectors and JumpersFunction of switches Function Action by the switch operation Effective timingSW9 2Function of connectorSpecial function 50%75% 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 indicatorLighting Cancellation of postponement Example When 42500 times 425 100 times Secs 5secs~9999 When it is 100 hours or more, hundreds digit, tens Example When 2450 hours 245 10 hoursSW2 setting Display detail Explanation for display Unit Cooling only Outdoor unit setting informationSingle phase 2 3 phase UnitDegF Fan step on error occurring ~10 Step Example When 130 pulse U9 Error status during the Error Discharge superheat on error occurring ~327 0~182degC SHdSecs Sub cool on error occurring. SC ~234 0~130degC Example When 415 minutes Minute SecsLED Rise of discharge temperatureFixed Hz operation Easy Maintenance FunctionMaintenance Mode Operation Method Switching to maintenance modeTo check the data for each item, repeat steps 5 to Data measurementGuide for Operation Condition Average data Initial Ta=A+B/2 Sensor on all Function SettingUnit Function Setting by the Remote Controller Data of the sensor Ta=C On main remote ControllerMode No.11 Setting No SettingsPLA-BA PCA-GA Press E FAN operation Selecting functions using the wired remote controllerFor modes 15 and higher Specified indoor unitOperating Procedure Operating instructions Flow of function selection procedureMode Selection Function Selection of Remote ControllerFunction selection flowchart FAN Mode VanePress Button for 3 seconds to switch to Maintenance monitorCheck button for 3 seconds to return to maintenance mode Turn on the Monitoring the operation dataRequest Code List Outdoor unit-Control state Code Description For indoor fan pulsation control 100101 Detail Contents in Request CodeActuator output state Request code Error content U9 Request code102 Fan control state Request codeContact demand capacity Request code Outdoor unit --Capacity setting display Request codeOutdoor unit Setting information Request code 103104 Data display See the table on the right Indoor unit Model setting information Request codeIndoor unit Capacity setting information Request code 105Photo Disassembly ProcedurePUZ-A18NHA2 PUZ-A18NHA2-BS Operating Procedure Photos 106Thermistor Outdoor pipe TH3 Removing the thermistor Outdoor 2-phase pipe TH6107 Removing the electrical parts box108 Operating Procedure Photos109 Removing the 4-way valveRemoving linear expansion valve Removing the accumulator Separator Recover refrigerant110 Removing the compressor MCRemoving the fan motor MF1 Operating Procedure Photos & IllustrationRemoving the service panel and top panel 111112 Removing the thermistor Outdoor pipe TH3Thermistor Discharge TH4 Removing the bypass valve coil 113Removing the 4-way valve coil Removing the linear expansion valve coil114 Removing the bypass valveRemoving the reactor ACLA24 115 Removing the reactor DCL A30Remove 2 receiver leg fixing screws 4 Removing the fan motor MF1, MF2 116Remove the service panel. See figure Outdoor pipe 117Remove the top panel. See figure Controller Coil Valve coil 118Are not oxidized Linear expansionDCL Low pressure switch 63L119 Removing the reactor DCL and capacitor CERemove 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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