Mitsubishi Electronics PUY-A12NHA2-BS, PUZ-A42NHA2-BS, PUZ-A30NHA2, PUY-A36NHA2 To the next

Page 43

Error Code

Abnormal point and detection method

Case

Judgment and action

 

 

 

 

 

Communication error with communica-

1 Data of transmission proces-

Turn off the power supply of outdoor unit and

 

tion processor

sor or unit processor is not

indoor unit and FRESH MASTER or LOSSNAY

 

Defective communication between unit

transmitted normally because

at the same time for 2 minutes or more, and

 

processor and transmission processor

of accidental trouble such as

turn the power on again. System returns to nor-

 

Note) The address and attribute display at

noise or thunder surge.

mal if abnormality was accidental malfunction.

A6

remote controller indicate the con-

2 Address forwarding from unit

If the same abnormality generates again,

(6606)

troller that detected abnormality.

processor is not transmitted

abnormality-generated controller may be defec-

normally because of defective

tive.

 

 

 

 

transmission processor hard-

 

 

 

ware.

 

 

 

 

 

 

NO ACK signal

Common factor that has no rela-

Always try the followings when the error

 

1. Transmitting side controller detects

tion with abnormality source.

“A7” occurs.

 

abnormal if a massage was transmitted

1 The unit of former address

 

 

but there is no reply (ACK) that a mes-

does not exist as address

1 Turn off the power supply of outdoor unit and

 

sage was received. Transmitting side

switch has changed while the

indoor unit and FRESH MASTER or LOSS-

 

unit was energized.

NAY at the same time for 2 minutes or more,

 

detects abnormality every 30 seconds, 6

 

2 Extinction of transmission wire

and turn the power on again. If malfunction

 

times continuously.

voltage and signal is caused by

was accidental, the unit returns to normal.

 

Note) The address and attribute displayed

 

over-range transmission wire.

2 Check address switch of abnormality gener-

 

at remote controller is indicate the

 

• Maximum distance ······200m

ated address.

 

controller that did not reply (ACK).

 

[656ft]

3 Check disconnection or looseness of abnor-

 

 

 

 

• Remote controller line ··(12m

mality generated or abnormality detected

 

 

[39ft])

transmission wire (terminal block and con-

 

 

3 Extinction of transmission wire

nector)

 

 

voltage and signal is caused by

4 Check if tolerance range of transmission wire

 

 

type-unmatched transmission

is not exceeded.

 

 

wire.

5 Check if type of transmission wire is correct

 

 

Type ······

or not.

 

 

With shield wire-

 

 

 

CVVS, CPEVS

If there were some troubles of 1-5above,

 

 

With normal wire (no shield)-

repair the defective, then turn off the power

 

 

VCTF, VCTFK, CVV

supply of outdoor unit and indoor unit and

 

 

CVS, VVR, VVF, VCT

FRESH MASTER or LOSSNAY at the same

 

 

Diameter····1.25mm2 [AWG16]

time for 2 minutes or more, and turn the power

 

 

or more

on again.

 

 

4 Extinction of transmission wire

• If there was no trouble with 1-5above in sin-

 

 

voltage and signal is caused

gle refrigerant system (one outdoor unit), con-

 

 

by over-numbered units.

troller of displayed address or attribute is

 

 

5 Accidental malfunction of

defective.

 

 

abnormality-detected controller

• If there was no trouble with 1-5above in dif-

 

 

(noise, thunder surge)

ferent refrigerant system (2 or more outdoor

A7

 

6 Defective of abnormality gen-

units), judge with 6.

(6607)

 

erated controller

6 If address of abnormality source is the

 

 

 

 

 

 

2. If displayed address or attribute is out-

1 Contact failure of transmission

address that should not exist, there is the

 

door unit, Indoor unit detects abnormali-

wire of outdoor unit or indoor

unit that memorizes nonexistent address

 

ty when indoor unit transmitted to out-

unit

information. Delete useless address informa-

 

door unit and there was no reply (ACK).

2 Disconnection of transmission

tion with manual setting function of remote

 

 

connector (CN2M) of outdoor

controller.

 

 

unit

Only the system FRESH MASTER or LOSS-

 

 

3 Defective transmitting receiv-

NAY are connected to, or the system that is

 

 

ing circuit of outdoor unit or

equipped with group setting of different

 

 

indoor unit

refrigerant system.

 

 

 

If there was no trouble with 1-6above,

 

 

 

replace the controller board of displayed

 

3. If displayed address or attribute is

1 During group operation with

 

address or attribute.

 

indoor unit, remote controller detects

indoor unit of multi- refrigerant

 

If the unit does not return to normal, multi-con-

 

abnormality when remote controller

system, if remote controller

 

troller board of outdoor unit may be defective

 

transmitted to indoor unit and there was

transmit to indoor unit while

 

(repeater circuit).

 

no reply (ACK).

outdoor unit power supply of

 

Replace multi-controller board one by one to

 

 

one refrigerant system is

 

 

check if the unit returns to normal.

 

 

turned off or within 2 minutes

 

 

 

 

 

of restart, abnormality is

 

 

 

detected.

 

 

 

2 Contact failure of transmission

 

 

 

wire of remote controller or

 

 

 

indoor unit

 

 

 

3 Disconnection of transmission

 

 

 

connector (CN2M) of indoor

 

 

 

unit

 

 

 

4 Defective transmitting receiv-

 

 

 

ing circuit of indoor unit or

 

 

 

remote controller

 

 

 

 

 

 

 

 

Continued to the next page.

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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 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 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 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 MasterVCTF, VCTFK, CVV CVS, VVR, VVF, VCT Troubleshooting by Inferior PhenomenaPhenomena 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 Airflow Direction… With Blower…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 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 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-P2Lower side Upper sideL1, L2 OFF Function of SWITCHES, Connectors and JumpersFunction of switches Function Action by the switch operation Effective timingSW9 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 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 ControllerSetting No Settings Mode No.11PLA-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 PhotosRemoving the 4-way valve 109Removing 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 111Removing the thermistor Outdoor pipe TH3 112Thermistor Discharge TH4 Removing the bypass valve coil 113Removing the 4-way valve coil Removing the linear expansion 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 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.

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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