Mitsubishi Electronics PUZ-A36NHA2-BS NET communication error, Hardware error of transmission

Page 42

Error Code

Abnormal point and detection method

Case

 

 

 

 

 

 

 

Judgment and action

 

 

 

 

 

Pipe temperature

1 Slight temperature difference

1~4 Check pipe <liquid or condenser /

 

 

 

<Cooling mode>

between indoor room

 

 

 

 

 

evaporator> temperature with room

 

 

 

Detected as abnormal when the pipe tem-

temperature and pipe <liquid

 

 

 

 

 

temperature display on remote

 

 

 

 

 

perature is not in the cooling range 3 min-

or condenser / evaporator>

 

 

 

 

 

controller and outdoor controller circuit

 

utes after compressor start and 6 minutes

temperature thermistor

 

 

 

 

 

board.

 

 

 

 

 

 

 

 

 

 

 

 

 

after the liquid or condenser/evaporator pipe

• Shortage of refrigerant

 

 

 

 

 

Pipe <liquid or condenser / evaporator>

 

is out of cooling range.

• Disconnected holder of pipe

 

 

 

 

 

temperature display is indicated by

 

 

 

Note 1) It takes at least 9 min. to detect.

<liquid or condenser /

 

 

 

 

 

setting SW2 of outdoor controller circuit

 

Note 2) Abnormality P8 is not detected in

evaporator> thermistor

 

 

 

 

 

board as follows.

 

 

 

 

 

 

 

 

)

 

 

drying mode.

• Defective refrigerant circuit

 

 

Conduct temperature check with outdoor

 

 

Cooling range : Indoor pipe temperature

2 Converse connection of

 

 

 

 

 

 

controller circuit board after connecting

 

 

 

 

 

 

 

 

(TH2 or TH5) – intake temperature

extension pipe (on plural units

(‘A-Control Service Tool(PAC-SK52ST)’.

 

 

(TH1) [ -3 deg [-5.4˚F]

connection)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TH: Lower temperature between liquid pipe

3 Converse wiring of indoor/

 

Temperature display of indoor liquid pipe

Temperature display of indoor condenser/

 

 

 

 

 

temperature and condenser/

outdoor unit connecting wire

 

Indoor 1

 

 

 

 

 

 

evaporator pipe

Indoor 1

 

 

 

 

 

 

1

2

3

4

5

6

 

1

2

3

4

 

5

6

 

 

P8

evaporator temperature

(on plural units connection)

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

ON

 

 

4 Defective detection of indoor

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

OFF

 

 

<Heating mode>

room temperature and pipe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Temperature display of indoor liquid pipe

Temperature display of indoor condenser/

 

When 10 seconds have passed after the

<condenser / evaporator>

 

 

 

Indoor 2

 

 

 

 

 

 

evaporator pipe

Indoor 2

 

 

 

 

 

compressor starts operation and the hot

temperature thermistor

 

1

2

3

4

5

6

 

1

2

3

4

 

5

6

 

 

 

adjustment mode has finished, the unit is

5 Stop valve is not opened

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

detected as abnormal when

completely.

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

condenser/evaporator pipe temperature is

 

 

 

 

 

 

 

 

 

A-Control Service Tool SW2 setting

 

 

 

 

 

not in heating range within 20 minutes.

 

23Check converse connection of extension

 

 

 

 

Note 3) It takes at least 27 minutes to

 

 

 

 

pipe or converse wiring of indoor/outdoor

 

detect abnormality.

 

 

 

 

unit connecting wire.

 

 

 

 

 

 

 

 

 

 

 

Note 4) It excludes the period of defrosting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Detection restarts when defrosting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mode is over)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating range : 3 deg [5.4˚F] [ (Condenser/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Evaporator temperature(TH5) –

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

intake temperature(TH1))

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<M-NET communication error>

(Note) “Indoor unit” in the text indicates M-NET board in outdoor unit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Error Code

Abnormal point and detection method

Case

 

 

 

 

 

 

 

Judgment and action

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address duplicate definition

1 There are 2 or more same

Search the unit with same address as abnormality

 

This error is displayed when transmission

address of controller of out-

occurred. If the same address is found, turn off the

A0

from the units of same address is detect-

door unit, indoor unit, FRESH

power supply of outdoor unit and indoor unit and

ed.

MASTER, or LOSSNAY.

FRESH MASTER or LOSSNAY at the same time

(6600)

Note) The address and attribute displayed

2 Noise has entered into trans-

for 2 minutes or more after the address is correct-

 

at remote controller indicate the con-

mission signal and signal was

ed, and turn the power on again.

 

 

 

 

 

 

 

 

Check transmission waveform or noise on trans-

 

troller that detected abnormality.

transformed.

 

mission wire.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hardware error of transmission

1 Error is detected if waveform is

1 If the works of transmission wire is done with

 

processor

transformed when wiring works of

 

 

the power on, turn off the power supply of

 

Transmission processor intended to trans-

transmission wire of outdoor unit,

 

 

outdoor unit and indoor unit and FRESH

 

 

 

mit “0”, but “1” appeared on transmission

indoor unit, FRESH MASTER or

 

 

MASTER or LOSSNAY at the same time for

A2

wire.

LOSSNAY are done, or polarity is

 

 

2 minutes or more, and turn the power on

Note) The address and attribute display at

changed with the power on and

 

 

again.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6602)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

remote controller indicate the con-

transmission data collide each other.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 Defective transmitting receiving

2 Check transmission waveform or noise on

 

troller that detected abnormality.

 

circuit of transmission processor

 

 

transmission wire.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 Transmission data is changed by

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the noise on transmission.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BUS BUSY

1 Transmission processor could

1 Check if transmission wire of indoor unit,

 

1. Overtime error by collision damage

not transmit signal because short

 

 

FRESH MASTER, LOSSNAY, or remote con-

 

Abnormal if transmitting signal is not

cycle voltage of noise and the

 

 

troller is not connected to terminal block for

 

possible for 8-10 minutes continuously

like have entered into transmis-

 

 

central control (TB7) of outdoor unit.

 

 

 

 

because of collision of transmission.

sion wire continuously.

2 Check if transmission wire of indoor unit,

 

2. Data could not reach transmission wire

2 Transmission quantity has

 

 

FRESH MASTER or LOSSNAY is not con-

 

for 8-10 minutes continuously because

increased and transmission is

 

 

nected to terminal block for transmission

 

of noise or etc.

not possible because there was

 

 

wire of outdoor unit.

 

 

 

 

 

 

 

 

 

 

 

wiring mistake of terminal block

 

 

 

 

 

 

 

 

 

 

 

 

 

Note) The address and attribute displayed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3

for transmission wire (TB3) and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

at remote controller indicate the con-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6603)

terminal block for central control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

troller that detected abnormality.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(TB7) in outdoor unit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 Transmission are mixed with

3 Check if terminal block for transmission wire

 

 

others and occupation rate on

 

 

(TB3) and terminal block for central control

 

 

transmission wire rose because

 

 

(TB7) are not connected.

 

 

 

 

 

 

 

 

 

 

of defective repeater (a function

4 Check transmission waveform or noise on

 

 

to connector or disconnect trans-

 

 

transmission wire.

 

 

 

 

 

 

 

 

 

 

 

 

mission of control and central

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

control system) of outdoor unit,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

then abnormality is detected.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

42

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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 ControllerRegulations in address settings NET address settingRefrigerant address setting NET wiringPUZ-A42NHA2 PUZ-A42NHA2-BS Refrigerant System DiagramPUZ-A18NHA2 PUZ-A18NHA2-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 runCheck Point Under Test RUN TroubleshootingTroubleshooting 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/OFFProcedure Malfunction-diagnosis method by wireless remote controllerMalfunction-diagnosis method at maintenance service Case of trouble during operationU9,UH SELF-DIAGNOSIS Action Table Error Code Abnormal point and detection method Case63L connector open CndcConnector open Error CodeCase Judgment and action 63H connector open Indoor/outdoor unit connectorAbnormalities detected while unit is operating Case Judgment and action High pressure High-pressure switchHigh discharging temperature 63H workedPower module Temperature thermistor TH4Temperature of heatsink Case Judgment and action Open/short circuit of dischargeCurrent sensor error Synchronous signal to main circuitWhen compressor locked Case Judgment and action Outdoor fan motorRemote controller control board Remote controller transmissionErrorE0/signal receiving errorE4 Case Judgment and action Low pressure 63L workedError Signal receiving error Case Judgment and action Remote controller transmissionErrorE3/signal receiving errorE5 Non defined error codeHardware error of transmission NET communication errorCase Judgment and action Pipe temperature Case Judgment and action Address duplicate definitionTo the next Master From the previousFresh Master LossnayTroubleshooting by Inferior Phenomena VCTF, VCTFK, CVV CVS, VVR, VVF, VCTPhenomena Factor Countermeasure Melans Please Wait YESOutdoor connecting wire Outdoor power circuit boardPower supply To the outdoor unit Check the breaker Miswiring, breakingNot lighting Indoor/outdoor connecting wire BlinkingDefective indoor Replace the indoor Power board Breaking or poor Fix the breaking or poorCheck if there is breaking Before repair Frequent calling from customers Action TableRefrigerant in the air conditioner is switched Phone Calls From Customers How to RespondSometimes This is the sound which is heard when the flow This is not a malfunctionWith Blower… With Airflow Direction…There might be a case that Page HOW to Check the Parts Fuse check Wiring contact checkPower supply check Remove the connector CNF1 ENDMedium temperature thermistor HOW to Check the ComponentsThermistor feature chart Low temperature thermistors 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 Releasing emergency operation Emergency operation procedureEmergency Operation SW4Operation data during emergency operation Test Point Diagram CN5 LI, NICNAC1, CNAC2 LO, noPUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BS RS1 DIP-IPM LD1-LD2DIP-PFC CN3 CN4 CN5TABP2/SC-P2 CnafCN3 ActmUpper side Lower sideL1, L2 Function Action by the switch operation Effective timing Function of SWITCHES, Connectors and JumpersFunction of switches 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 2450 hours 245 10 hours Example When 42500 times 425 100 times Secs 5secs~9999 When it is 100 hours or more, hundreds digit, tens Lighting Cancellation of postponementSW2 setting Display detail Explanation for display Unit Unit Outdoor unit setting informationSingle phase 2 3 phase Cooling onlyDegF Fan step on error occurring ~10 Step Example When 130 pulse Example When 415 minutes Minute Secs Discharge superheat on error occurring ~327 0~182degC SHdSecs Sub cool on error occurring. SC ~234 0~130degC U9 Error status during the ErrorRise of discharge temperature LEDSwitching to maintenance mode Easy Maintenance FunctionMaintenance Mode Operation Method Fixed Hz operationData measurement To check the data for each item, repeat steps 5 toGuide for Operation Condition Data of the sensor Ta=C On main remote Controller Function SettingUnit Function Setting by the Remote Controller Average data Initial Ta=A+B/2 Sensor on allMode No.11 Setting No SettingsPLA-BA PCA-GA Specified indoor unit Selecting functions using the wired remote controllerFor modes 15 and higher Press E FAN operationOperating Procedure Flow of function selection procedure Operating instructionsFunction Selection of Remote Controller Mode SelectionFunction selection flowchart Mode Vane FANTurn on the Monitoring the operation data Button for 3 seconds to switch to Maintenance monitorCheck button for 3 seconds to return to maintenance mode PressRequest Code List Outdoor unit-Control state Code Description 100 For indoor fan pulsation controlDetail Contents in Request Code 101Fan control state Request code Error content U9 Request code102 Actuator output state Request code103 Outdoor unit --Capacity setting display Request codeOutdoor unit Setting information Request code Contact demand capacity Request code104 105 Indoor unit Model setting information Request codeIndoor unit Capacity setting information Request code Data display See the table on the right106 Disassembly ProcedurePUZ-A18NHA2 PUZ-A18NHA2-BS Operating Procedure Photos PhotoRemoving the electrical parts box Removing the thermistor Outdoor 2-phase pipe TH6107 Thermistor Outdoor pipe TH3Operating Procedure Photos 108109 Removing the 4-way valveRemoving linear expansion valve Removing the compressor MC Separator Recover refrigerant110 Removing the accumulator111 Operating Procedure Photos & IllustrationRemoving the service panel and top panel Removing the fan motor MF1112 Removing the thermistor Outdoor pipe TH3Thermistor Discharge TH4 Removing the linear expansion valve coil 113Removing the 4-way 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 Linear expansion 118Are not oxidized Coil Valve coilRemoving the reactor DCL and capacitor CE Low pressure switch 63L119 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.

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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