Mitsubishi Electronics PUZ-A18NHA2, PUZ-A30NHA2 Case Judgment and action Low pressure 63L worked

Page 40

Error Code

Abnormal point and detection method

Case

Judgment and action

 

Low pressure (63L worked)

1 Stop valve of outdoor unit is

1 Check stop valve.

 

Abnormal if 63L is worked (under-

closed during operation.

 

 

0.03MPa) during compressor operation.

2 Disconnection or loose connection 2~4 Turn the power off and on again to check

 

63L: Low-pressure switch

of connector (63L) on outdoor

if F3 is displayed on restarting.

UL

 

controller board

If F3 is displayed, follow the F3 processing

(A42N only)

3 Disconnection or loose

direction.

(1300)

 

connection of 63L

 

 

 

 

 

 

4 Defective outdoor controller board

 

 

 

5 Leakage or shortage of refrigerant

5 Correct to proper amount of refrigerant.

 

 

6 Malfunction of linear expansion

6 Check linear expansion valve.

 

 

valve

Refer to 10-6.

 

 

 

 

 

Compressor overcurrent interruption

1 Stop valve of outdoor unit is

1 Open stop valve.

 

Abnormal if overcurrent DC bus or com-

closed.

 

 

pressor is detected after compressor starts

2 Decrease of power supply volt-

2 Check facility of power supply.

 

operating for 30 seconds.

age

 

 

 

3 Looseness, disconnection or

3 Correct the wiring (U·V·W phase) to

 

 

converse of compressor wiring

compressor. Refer to 10-9 (Outdoor power

 

 

connection

circuit board).

 

 

4 Defective fan of indoor/outdoor

4 Check indoor/outdoor fan.

 

 

units

5 Solve short cycle.

UP

 

5 Short cycle of indoor/outdoor

6 Replace outdoor controller circuit board.

 

units

7 Check compressor.

(4210)

 

6 Defective input circuit of out-

Refer to 10-6.

 

 

door controller board

W Before the replacement of the outdoor

 

 

7 Defective compressor

controller circuit board, disconnect the wiring

 

 

 

to compressor from the outdoor power circuit

 

 

 

board and check the output voltage among

 

 

 

phases, U, V, W, during test run. No defect

 

 

 

on board if voltage among phases (U-V, V-W

 

 

 

and W-U) is same. Make sure to perform the

 

 

 

voltage check with same performing frequency.

 

 

 

 

Remote controller transmission

1 Contact failure at transmission 1 Check disconnection or looseness of indoor

 

error(E0)/signal receiving error(E4)

wire of remote controller

unit or transmission wire of remote controller.

 

1 Abnormal if main or sub remote con-

2 All remote controllers are set

2 Set one of the remote controllers “main”.

 

troller cannot receive normally any trans-

as “sub” remote controller. In

If there is no problem with the action above.

 

3 Check wiring of remote controller.

 

mission from indoor unit of refrigerant

this case, E0 is displayed on

 

• Total wiring length: max. 500m[1640ft]

 

address “0” for 3 minutes.

remote controller, and E4 is

 

(Do not use cable o 3 or more.)

 

(Error code : E0)

displayed at LED (LED1, LED2)

 

• The number of connecting indoor units:

 

2 Abnormal if sub-remote controller could

on the outdoor controller circuit

 

max. 16 units

 

not receive for any signal for 2 minutes.

board.

 

• The number of connecting remote con-

 

(Error code: E0)

3 Miswiring of remote controller

 

troller: max. 2 units

 

1 Abnormal if indoor controller board can

4 Defective transmitting receiving

 

 

circuit of remote controller

When the above-mentioned problem of 1~3

E0

not receive any data normally from

5 Defective transmitting receiving

are not applied

remote controller board or from other

circuit of indoor controller board

4 Diagnose remote controllers.

or

indoor controller board for 3 minutes.

of refrigerant address “0”.

a) When “RC OK” is displayed,

E4

(Error code: E4)

6 Noise has entered into the

remote controllers have no problem.

 

Turn the power off, and on again to

 

2 Indoor controller board cannot receive

transmission wire of remote

 

check. If abnormality generates again,

 

any signal from remote controller for 2

controller.

 

replace indoor controller board.

 

minutes. (Error code: E4)

 

 

 

b) When “RC NG” is displayed,

 

 

 

replace remote controller.

 

 

 

c) When “RC E3” is displayed,

 

 

 

d) When “ERC 00-06” is displayed,

 

 

 

[ c),d)Noise may be causing abnormality. ]

 

 

 

If the unit is not normal after replacing

 

 

 

indoor controller board in group control,

 

 

 

indoor controller board of address “0”

 

 

 

may be abnormal.

 

 

 

 

 

Remote controller control board

1 Defective remote controller

1 Replace remote controller.

1Abnormal if data cannot be normally read from the nonvolatile memory of the

E1

remote controller control board.

(Error code: E1)

or

 

E2

2 Abnormal if the clock function of remote

 

controller cannot be normally operated.

 

(Error code: E2)

40

Image 40
Contents Contents Parts Catalog OCB429Reference Manual Indoor UnitSafety Precaution Always Observe for SafetyWhen charging directly from cylinder Additional refrigerant chargeR22 PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BS FeaturesPUZ-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 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 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 LossnayVCTF, VCTFK, CVV CVS, VVR, VVF, VCT Troubleshooting by Inferior PhenomenaPhenomena 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 Airflow Direction… With Blower…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 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 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 ActmLower side Upper sideL1, L2 Function of SWITCHES, Connectors and Jumpers Function of switchesFunction Action by the switch operation Effective timing OFF2Function of connector SW950% Special function75% 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 allSetting No Settings Mode No.11PLA-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 108Removing the 4-way valve 109Removing 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 MF1Removing the thermistor Outdoor pipe TH3 112Thermistor Discharge TH4 113 Removing the 4-way valve coilRemoving the linear expansion valve coil Removing the bypass valve coilRemoving the bypass valve 114Removing the reactor ACLA24 Removing the reactor DCL A30 115Remove 2 receiver leg fixing screws 4 116 Removing the fan motor MF1, MF2117 Remove the service panel. See figure Outdoor pipeRemove 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.

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.