Mitsubishi Electronics PUZ-A24NHA2-BS Case Judgment and action Remote controller transmission

Page 41

Error Code

Abnormal point and detection method

Case

Judgment and action

 

Remote controller transmission

 

1 Set a remote controller to main, and the

 

error(E3)/signal receiving error(E5)

1 2 remote controller are set as

other to sub.

 

1 Abnormal if remote controller could not

“main.”

 

 

find blank of transmission path for 6 sec-

(In case of 2 remote con-

 

 

onds and could not transmit.

trollers)

 

 

(Error code: E3)

 

 

2 Remote controller is connected

2 Remote controller is connected with only one

 

2 Remote controller receives transmitted

 

data at the same time, compares the

with 2 indoor units or more.

indoor unit.

 

data, and when detecting it, judges

3 Repetition of refrigerant

3 The address changes to a separate setting.

E3

different data to be abnormal 30

address

 

or

continuous times. (Error code: E3)

4 Defective transmitting receiving

4~6 Diagnose remote controller.

E5

1 Abnormal if indoor controller board could

circuit of remote controller

a) When “RC OK”is displayed, remote con-

 

5 Defective transmitting receiving

trollers have no problem.

 

not find blank of transmission path.

circuit of indoor controller

Turn the power off, and on again to check.

 

(Error code: E5)

 

When becoming abnormal again, replace

 

2 Indoor controller board receives trans-

board

 

indoor controller board.

 

mitted data at the same time, compares

6 Noise has entered into trans-

 

b)When “RC NG”is displayed, replace

 

the data,and when detecting it, judges

mission wire of remote con-

 

remote controller.

 

different data to be abnormal 30

troller.

 

c)When “RC E3”or “ERC 00-66”is displayed,

 

continuous times. (Error code: E5)

 

 

noise may be causing abnormality.

 

 

 

 

 

 

 

 

Indoor/outdoor unit communication

1 Contact failure of indoor/out-

1 Check disconnection or looseness of indoor/

 

error (Signal receiving error)

door unit connecting wire

outdoor unit connecting wire of indoor or out-

 

(Outdoor unit)

2 Defective communication circuit

door units.

E8

(1) Abnormal if outdoor controller circuit

of outdoor controller circuit board

2~4 Turn the power off, and on again to

(6840)

board could not receive anything

3 Defective communication cir-

check. Replace indoor controller board or

 

normally for 3 minutes.

cuit of indoor controller board

outdoor controller circuit board if abnormal-

 

 

4 Noise has entered into indoor/

ity is displayed again.

 

 

outdoor unit connecting wire.

 

 

 

 

 

 

Indoor/outdoor unit communication

1 Indoor/ outdoor unit connecting

1 Check disconnection or looseness of

 

error (Transmitting error) (Outdoor unit)

wire has contact failure.

indoor/outdoor unit connecting wire.

 

(1) Abnormal if “0” receiving is detected 30

2 Defective communication circuit

2~4 Turn the power off, and on again to

E9

times continuously though outdoor con-

of outdoor controller circuit board

check. Replace outdoor controller circuit

(6841)

troller circuit board has transmitted “1”.

3 Noise has entered power supply.

board if abnormality is displayed again.

 

(2) Abnormal if outdoor controller circuit

4 Noise has entered indoor/ out-

 

 

board could not find blank of transmission

door unit connecting wire.

 

 

 

 

 

path for 3 minutes.

 

 

 

 

 

 

 

Non defined error code

1 Noise has entered transmission

12 Turn the power off, and on again to check.

 

This code is displayed when non defined

wire of remote controller.

Replace indoor controller board or outdoor

EF

error code is received.

2 Noise has entered indoor/ out-

controller circuit board if abnormality is

(6607

 

door unit connecting wire.

displayed again.

or

 

3 Outdoor unit is not a power-

3 Replace outdoor unit with power-inverter type

6608)

 

inverter models.

outdoor unit.

 

 

4 Model name of remote con-

4 Replace remote controller with MA remote

 

 

troller is PAR-S25A.

controller.

 

 

 

 

 

Serial communication error

1 Breaking of wire or contact

12 Check connection of each connector CN2

 

1.Abnormal if serial communication

failure of connector CN2

and CN4 between the outdoor controller

 

between outdoor controller circuit

between the outdoor controller

circuit board and the outdoor power circuit

 

board and outdoor power circuit board

circuit board and the outdoor

board.

 

is defective.

power circuit board

 

 

 

2 Breaking of wire or contact

 

 

 

failure of connector CN4

 

 

 

between the outdoor controller

 

 

 

circuit board and the outdoor

 

 

 

power circuit board

 

 

 

3 Defective communication circuit

3 Replace outdoor power circuit board.

 

 

of outdoor power circuit board

 

Ed

 

4 Defective communication circuit

4 Replace outdoor controller circuit board.

(0403)

 

of outdoor controller circuit board

 

 

 

for outdoor power circuit board

 

 

2. Abnormal if communication between

1 Breaking of wire or contact

1 Check disconnection, looseness, or breaking of

 

outdoor controller circuit board and

failure of connector between

connection wire between outdoor controller cir-

 

M-NET board is not available.

outdoor controller circuit board

cuit board (CNMNT) and M-NET board (CN5).

 

 

and M-NET board

 

 

 

2 Contact failure of M-NET board

2 Check disconnection, looseness, or breaking of

 

 

power supply line

connection wire between outdoor controller cir-

 

 

 

cuit board(CNMNT) and M-NET board (CND).

 

 

3 Noise has entered into M-NET

3 Check M-NET transmission wiring method.

 

 

transmission wire.

 

 

 

 

 

41

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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.

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