Mitsubishi Electronics PUY-A18NHA2-BS Error Code, Case Judgment and action 63H connector open

Page 36

Error Code

Abnormal point and detection method

Case

Judgment and action

 

 

 

 

 

63H connector open

1 Disconnection or contact failure

1 Check connection of 63H connector on

 

Abnormal if 63H connector circuit is open

of 63H connector on outdoor

outdoor controller circuit board.

 

for 3 minutes continuously after power sup-

controller circuit board

Refer to 10-9.

F5

ply.

2 Disconnection or contact failure

2 Check the 63H side of connecting wire.

63H: High-pressure switch

of 63H

 

(5201)

 

3 63H is working due to defective

3 Check continuity by tester.

 

 

parts.

Replace the parts if the parts are defective.

 

 

4 Defective outdoor controller

4 Replace outdoor controller circuit board.

 

 

circuit board

 

 

 

 

 

 

2 connector open

1 Disconnection or contact failure

1 Check connection of connector(63H,63L) on

 

Abnormal if both 63H and 63L connector

of connector (63H,63L) on

outdoor controller circuit board.

 

circuits are open for 3 minutes continuous-

outdoor controller circuit board.

Refer to 10-9.

 

ly after power supply.

2 Disconnection or contact failure

2 Check the 63H and 63L side of connecting

F9

63H: High-pressure switch

of 63H, 63L

wire.

(4119)

3 63H and 63L are working due

3 Check continuity by tester.

 

63L: Low-pressure switch

to defective parts.

Replace the parts if the parts are defective.

 

<A42N only>

4 Defective outdoor controller

4 Replace outdoor controller circuit board.

 

board

 

 

 

 

 

 

Indoor/outdoor unit connector

1 Contact failure or miswiring of

1 Check disconnection or looseness or polarity

 

miswiring, excessive number of units

indoor/outdoor unit connecting

of indoor/outdoor unit connecting wire of

 

1. Outdoor controller circuit board can

wire

indoor and outdoor units.

 

automatically check the number of

2 Diameter or length of

 

 

connected indoor units. Abnormal if the

indoor/outdoor unit connecting

2 Check diameter and length of indoor/outdoor

 

number cannot be checked automatically

wire is out of specified capacity.

unit connecting wire.

 

due to miswiring of indoor/outdoor unit

3 4 or more indoor units are

Total wiring length: 80m[262ft]

 

connecting wire and etc. after power is

connected to 1 outdoor unit.

(including wiring connecting each indoor unit

 

turned on for 4 minutes.

4 Defective transmitting receiving

and between indoor and outdoor unit)

EA

2. Abnormal if outdoor controller circuit

circuit of outdoor controller

Also check if the connection order of flat

board recognizes excessive number of

circuit board

cable is S1, S2, S3.

(6844)

indoor units.

5 Defective transmitting receiving

 

 

3 Check the number of indoor units that are

 

 

circuit of indoor controller

 

 

board

connected to one outdoor unit. (If EA is

 

 

6 Defective indoor power board

detected)

 

 

7 2 or more outdoor units have

4~6 Turn the power off once, and on again to

 

 

refrigerant address “0” .

 

 

(In case of group control)

check.

 

 

8 Noise has entered into power

Replace outdoor controller circuit board,

 

 

supply or indoor / outdoor unit

indoor controller board or indoor power

 

 

connecting wire.

board if abnormality occurs again.

 

 

 

 

 

Miswiring of indoor/outdoor unit

1 Contact failure or miswiring of

7 Check if refrigerant addresses (SW1-3 to

 

connecting wire (converse wiring or

indoor/outdoor unit connecting

SW1-6 on outdoor controller circuit board)

 

disconnection)

wire

 

are overlapping in case of group control

 

Outdoor controller circuit board can

2 Diameter or length of

 

system.

 

automatically set the unit number of indoor

indoor/outdoor unit connecting

 

 

 

units.

wire is out of specified capacity.

8 Check transmission path, and remove the

 

Abnormal if the indoor unit number cannot

4 Defective transmitting receiving

 

be set within 4 minutes after power on

circuit of outdoor controller circuit

cause.

 

 

Eb

because of miswiring (converse wiring or

board

w The descriptions above, 1-8, are for EA, Eb

(6845)

disconnection) of indoor/outdoor unit con-

5 Defective transmitting receiving

 

necting wire.

circuit of indoor controller board

and EC.

 

 

 

 

6 Defective indoor power board

 

 

 

7 2 or more outdoor units have

 

 

 

refrigerant address “0” .

 

 

 

(In case of group control)

 

 

 

8 Noise has entered into power

 

 

 

supply or indoor/outdoor unit

 

 

 

connecting wire.

 

 

 

 

 

 

Start-up time over

1 Contact failure of indoor/

 

 

The unit cannot finish start-up process

outdoor unit connecting wire

 

 

within 4 minutes after power on.

2 Diameter or length of indoor/

 

 

 

outdoor unit connecting wire is

 

EC

 

out of specified capacity.

 

 

7 2 or more outdoor units have

 

(6846)

 

refrigerant address “0” .

 

 

 

(In case of group control)

 

 

 

8 Noise has entered into power

 

 

 

supply or indoor/outdoor unit

 

 

 

connecting wire.

 

 

 

 

 

36

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Contents Contents Parts Catalog OCB429Reference Manual Indoor UnitSafety Precaution Always Observe for SafetyWhen charging directly from cylinder Additional refrigerant chargeR22 Features PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BSPUZ-A42NHA2 PUZ-A42NHA2-BS PUY-A42NHA2 PUY-A42NHA2-BS Specifications PUZ-A18NHA2 PUZ-A24NHA2 PUZ-A30NHA2 PUZ-A36NHA2 PUZ-A42NHA2PUY-A18NHA2-BS PUY-A24NHA2-BS Compressor Technical Data DataNoise Criterion Curves PUZ-A18NHA2-BSStandard Operation Data Heat pumpCooling only PKA-A12GA PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BAOutdoor Unit Unit mminchExample of Notes Service Space 662-5/8 Air outletWiring Diagram NET AdapterPUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BS NET AdapterWUse copper supply wires TABU/V/W Wiring Specifications System Simultaneous twin systemSeparate Indoor UNIT/OUTDOOR Unit Power Supplies OFFIndoor Outdoor Connecting Cable NET Wiring Method Refrigerant address NET address Control Remote ControllerNET address setting Refrigerant address settingRegulations in address settings NET wiringRefrigerant System Diagram PUZ-A18NHA2 PUZ-A18NHA2-BSPUZ-A42NHA2 PUZ-A42NHA2-BS Way valve solenoid coil Heating on Cooling OFFPUY-A12/18NHA2 PUY-A12/18NHA2-BS PUY-A42NHA2 PUY-A42NHA2-BSRefrigerant recovering pump down Start and finish of test runTroubleshooting TroubleshootingCheck Point Under Test RUN Before 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 Remote Controller Diagnosis ON/OFFMalfunction-diagnosis method by wireless remote controller Malfunction-diagnosis method at maintenance serviceProcedure Case of trouble during operationU9,UH Error Code Abnormal point and detection method Case 63L connector openSELF-DIAGNOSIS Action Table CndcError Code Case Judgment and action 63H connector openConnector open Indoor/outdoor unit connectorCase Judgment and action High pressure High-pressure switch High discharging temperatureAbnormalities detected while unit is operating 63H workedTemperature thermistor TH4 Temperature of heatsinkPower module Case Judgment and action Open/short circuit of dischargeSynchronous signal to main circuit When compressor lockedCurrent sensor error Case Judgment and action Outdoor fan motorRemote controller transmission ErrorE0/signal receiving errorE4Remote controller control board Case Judgment and action Low pressure 63L workedCase Judgment and action Remote controller transmission ErrorE3/signal receiving errorE5Error Signal receiving error Non defined error codeNET communication error Case Judgment and action Pipe temperatureHardware error of transmission Case Judgment and action Address duplicate definitionTo the next From the previous Fresh MasterMaster LossnayTroubleshooting by Inferior Phenomena VCTF, VCTFK, CVV CVS, VVR, VVF, VCTPhenomena Factor Countermeasure Melans Please Wait YESOutdoor power circuit board Power supply To the outdoor unit Check the breakerOutdoor connecting wire Miswiring, breakingIndoor/outdoor connecting wire Blinking Defective indoor Replace the indoor Power boardNot lighting Breaking or poor Fix the breaking or poorCheck if there is breaking Before repair Frequent calling from customers Action TablePhone Calls From Customers How to Respond Sometimes This is the sound which is heard when the flowRefrigerant in the air conditioner is switched This is not a malfunctionWith Blower… With Airflow Direction…There might be a case that Page HOW to Check the Parts Wiring contact check Power supply check Remove the connector CNF1Fuse check ENDHOW to Check the Components Thermistor feature chart Low temperature thermistorsMedium temperature thermistor High 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 detach the coil How to attach the coilBe sure to attach the stopper Emergency operation procedure Emergency OperationReleasing emergency operation SW4Operation data during emergency operation Test Point Diagram LI, NI CNAC1, CNAC2CN5 LO, noPUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BS RS1 LD1-LD2 DIP-PFCDIP-IPM CN3 CN4 CN5Cnaf CN3TABP2/SC-P2 ActmUpper side Lower sideL1, L2 Function of SWITCHES, Connectors and Jumpers Function of switchesFunction Action by the switch operation Effective timing OFF2Function of connector SW9Special function 50%75% Display function of inspection for outdoor unit Blinking Abnormality of outdoor fan Motor rotational speed 1Check the outdoor fan motor 1Check if stop valves are openOperation indicator Digital indicator LED1 working detailsExample When 42500 times 425 100 times Secs 5secs ~9999 When it is 100 hours or more, hundreds digit, tensExample When 2450 hours 245 10 hours Lighting Cancellation of postponementSW2 setting Display detail Explanation for display Unit Outdoor unit setting information Single phase 2 3 phaseUnit Cooling onlyDegF Fan step on error occurring ~10 Step Example When 130 pulse Discharge superheat on error occurring ~327 0~182degC SHd Secs Sub cool on error occurring. SC ~234 0~130degCExample When 415 minutes Minute Secs U9 Error status during the ErrorRise of discharge temperature LEDEasy Maintenance Function Maintenance Mode Operation MethodSwitching to maintenance mode Fixed Hz operationData measurement To check the data for each item, repeat steps 5 toGuide for Operation Condition Function Setting Unit Function Setting by the Remote ControllerData of the sensor Ta=C On main remote Controller Average data Initial Ta=A+B/2 Sensor on allMode No.11 Setting No SettingsPLA-BA PCA-GA Selecting functions using the wired remote controller For modes 15 and higherSpecified indoor unit Press E FAN operationOperating Procedure Flow of function selection procedure Operating instructionsFunction Selection of Remote Controller Mode SelectionFunction selection flowchart Mode Vane FANButton for 3 seconds to switch to Maintenance monitor Check button for 3 seconds to return to maintenance modeTurn on the Monitoring the operation data PressRequest Code List Outdoor unit-Control state Code Description 100 For indoor fan pulsation controlDetail Contents in Request Code 101Error content U9 Request code 102Fan control state Request code Actuator output state Request codeOutdoor unit --Capacity setting display Request code Outdoor unit Setting information Request code103 Contact demand capacity Request code104 Indoor unit Model setting information Request code Indoor unit Capacity setting information Request code105 Data display See the table on the rightDisassembly Procedure PUZ-A18NHA2 PUZ-A18NHA2-BS Operating Procedure Photos106 PhotoRemoving the thermistor Outdoor 2-phase pipe TH6 107Removing the electrical parts box Thermistor Outdoor pipe TH3Operating Procedure Photos 108109 Removing the 4-way valveRemoving linear expansion valve Separator Recover refrigerant 110Removing the compressor MC Removing the accumulatorOperating Procedure Photos & Illustration Removing the service panel and top panel111 Removing the fan motor MF1112 Removing the thermistor Outdoor pipe TH3Thermistor Discharge TH4 113 Removing the 4-way valve coilRemoving the linear expansion valve coil Removing the bypass valve coil114 Removing the bypass valveRemoving the reactor ACLA24 115 Removing the reactor DCL A30Remove 2 receiver leg fixing screws 4 116 Removing the fan motor MF1, MF2Remove the service panel. See figure Outdoor pipe 117Remove the top panel. See figure Controller 118 Are not oxidizedLinear expansion Coil Valve coilLow pressure switch 63L 119Removing 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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