Toshiba MMU-AP0071MH H16 TK4 temperature detective circuit error, L04, L05, L03, L06

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Check code name

Check code name

Cause of operation

[H16]

TK4 temperature detective circuit error 1.

Detachment of TK4 sensor, miscabling,

 

(Auxiliary code : 04)

characteristics error of resistance value

 

2.

Check clogging and malfunction of

 

 

SV3E valve circuit.

Check code name

Check code name

Cause of operation

 

 

 

[L04]

Duplicated setup of outdoor line address

Outdoor line addresses are duplicated.

 

 

 

3.

Oil-equalization circuit error

 

(Check capillary clogging, strainer

 

clogging)

4.

Refrigerant stagnation in compressor

 

shell

YES

Is there duplicated line address setup?

 

NO

 

 

 

NO

Are communication cable connections of

 

[U1.U2], [U3.U4], and [U5, U6] normal?

 

Correct the line address setup.

Correct the cable connection.

78

Is not TK4 sensor detached?

NO

Is there no miscabling or misinstallation

on TK1/TK2/TK3/TK4 sensors?

NO

Are characteristics of TK4 sensor

resistance value normal?

YES

Does OCR of MG-SW operate?

NO

Check the clogging of SV3E valve.

(1)

YES

YES

NO

YES

No error

1 Refer to item [H07] error.

Correct installation of sensor.

Correct miscabling/misinstallation.

TK1: CN514

( TK2: CN515 )

TK3: CN516

TK4: CN523

Sensor error Replace

Reset OCR manually.(2)

Check I/F P.C. board

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

Check outdoor I/F P.C. board.

 

Re-set up the address.

Failure Replace

 

(Refer to “Address setup”.)

 

 

 

 

 

Check code name

Check code name

Cause of operation

 

 

 

[L05]

Duplicated indoor units with priority

1. Two or more prior indoor units exist.

 

(Displayed on indoor unit with priority)

 

 

 

 

This check code is displayed on the set indoor unit when setup of indoor unit with priority is duplicated.

• Priority setup with two or more units is not available. Choose one prior unit in one refrigerant circuit system.

Error

Replace SV3E valve.

2 If OCR operates even after manual reset of OCR, check whether the wiring to the current sensor (T02) of Comp-IPDU is correct or not.

Check the clogging of SV3E valve.

 

Check code name

Check code name

Cause of operation

 

 

 

 

 

[L03]

Duplicated indoor header units

There were two or more indoor header

 

 

 

units in some remote controller group

 

 

 

control.

 

 

 

 

 

 

 

 

1)

Check the connection changing of the remote controller after the connection has been changed.

2)

If the group configuration and address are normal when power has been turned on, the mode automatically shifts

 

to address setup mode. (Re-setup of address) → Refer to “Address setup”.

 

 

 

 

 

Check code name

Check code name

Cause of operation

 

 

 

[L06]

Duplicated indoor units with priority

Two or more indoor units with priority

 

(Displayed on the indoor unit other than

are duplicated.

 

one with priority and on the outdoor unit)

 

Auxiliary code : No. of indoor units with priority

When indoor unit with priority is duplicated, this check code is displayed on the unit other than the setup indoor unit and outdoor unit.

• As only one indoor unit with priority is valid, change the setup.

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Contents
Compact 4-Way Air Discharge Cassette Type Contents Safety Caution Fire is caused at user’s side Check the following items after reinstallationCatch the inner cables Metal section Earth positionPiping Safety Caution Concerned to New RefrigerantPipe Materials Flare nutTools R410A Conventional air Air conditioner installationConditioner installation General tools Conventional tools can be used4mm-hexagonal wrench is required Recharge of RefrigerantEnvironment Cylinder with siphonConstruction Views External Views Space required for Installation and servicingWired remote Drain-up standing-up sizeMCC-1402 Wiring DiagramFor Indoor unit Control P.C. boardName of Each Part Parts RatingParts Rating ModelParts Name of Remote Controller Display sectionButton Remote controller sensorOperation section Wind direction and SwingPreparation Turn on the main power switch and/or the leakage breakerCorrect Usage StopAutomatic Operation Super Heat Recovery Type Only When restarting the operation after stopStart Cancel of timer operation Timer OperationTimer operation To select SET TimeHow to start swinging Adjustment of Wind DirectionHow to set up the air direction How to stop swingingInformation Air Conditioner Operations and Performance When the Following Symptoms are Found StandbyTo Disconnect the Appliance from Main Power Supply Precautions for SafetyNew Refrigerant Air Conditioner Installation Connect all of the installation wiring correctlyInstallation space Selection of Installation PlaceInstallation space Installable ceiling height listInstallation of Indoor Unit Case of wireless typeDimensional view Installation of hanging bolt Ceiling opening and installation of hanging boltsInstallation of ceiling panel Sold separately Installation of remote controller Sold separatelyDrain Piping Work Thermal insulating process Piping material and dimensionsRefrigerant Piping Permissible pipe length and permissible height differenceAirtight test/Air purge, etc Electric WorkConnection of refrigerant pipe Open fully valves of the outdoor unit Gas leak checkIndoor/Outdoor inter-unit wiring, Central controller wiring Power supply specificationsIndoor unit power supply *1 Remote controller wiring *4Applicable Controls Change of lighting time of filter sign Case of installation to high ceilingCase of remote controller-less Group control Increased heating effectCase of wired remote controller How to execute test operationCase of wireless remote controller Test RUNCheck code list TroubleshootingConfirmation of error history Confirmation and check Check methodTroubleshooting Error detected by TCC-LINK central control deviceNew check code MaintenanceDaily maintenance Way Air Discharge Cassette TypeRefrigerating Cycle Diagram Functional part name Functional outlineRemote controller Control outline Command Control SpecificationsOutline of specifications Remarks Control OutlineReset conditions ValueTCB-AX21E Central control mode 1 Cannot operate Central control modeCentral control mode 4 Cannot select mode Procedure Execute the setup operation while the unit stops Applied ControlDescription At shipment HEAT, Heat → CoolApplied Control in Indoor Unit Indoor unit capacityRemote location ON/OFF control box TCB-IFCB-4E Function Ventilating fan control from remote controllerWiring OperationButton, set to the setup data Power peak-cut from indoor unitUsing the setup temp Leaving-ON prevention controlBefore troubleshooting TroubleshootingTroubleshooting Summary Troubleshooting procedureAuxiliary code Check code listCheck Method Judging deviceMG-SW Sensor block displayError detected by TCC-LINK central control device Check code Outdoor 7-segment display Auxiliary codeCheck code Confirmation of error history Troubleshooting by Check Display on Remote ControllerCase of wired remote controller RBC-AMT31E Procedure DescriptionCase of central remote controller TCB-SC642TLE Check code Auxiliary code Check codeOutdoor 7-segment display RemoteMain Outdoor 7-segment display Remote Setup method of No. capacity-over DetectionCheck code Convenient functionsRemote Main Outdoor 7-segment displayCheck code Auxiliary code DetectedRemote Check code Check item positionStatus Error detection condition Check item position Detected MainPosition Remote Check all the outdoor units in the corresponding line Check code Main Outdoor 7-segment displayH07 Check clogging of oil equation pipe between compressorsCheck code Main Outdoor 7-segment display Remote H16L30 Detected indoor address L31 P01 P03 P04 TS error judgment standard temperature NameHeating Remote Check code Auxiliary code Error detection condition Check item position Outdoor 7-segment display Check code nameDisplay on Outdoor 7-segment display Detected positionDevice Check code Central controlHow to check the outdoor fan motor How to check inverter outputHow to check resistance of compressor winding Measured position CriteriaE04 Diagnosis Procedure for Each Check CodeE03 E02E06 Decreased number of indoor units E07E15 E08E12 E09 Duplicated masterE19 E16E18 ReferenceE23 ∗ 1 How to clear the errorE20 E25F02 E31F01 F03F06 TE1 sensor error F04 TD1 sensor errorF05 TD2 sensor error F08 To sensor errorTE1, TL F29 Indoor other errorF15 Outdoor temp sensor miscabling F23H01 F31H02 H03 H06 Low-pressure protective operation Leakage check for SV3C valve Clogging for SV3E valveClogging check for SV3D valve Clogging check for oil-equalization circuit H08Oil level detective circuit system error TK3 temperature detective circuit errorL05 H16 TK4 temperature detective circuit errorL04 L03L17 L07 Group line in individual indoor unitL10 L08L20 L18L29 L28P03 P01 Indoor fan motor errorL30 Interlock in indoor unit L31High-pressure SW P05 Open phase, negative phaseP04 Actuation Auxiliary code Compressor 1 sideIndoor fan motor error P07 Heat sink overheat errorP10 Indoor overflow error P12Gas leak detection P13 Outdoor liquid back detection error 1. PMV1/PMV2 errorP15 TS condition Auxiliary codeP17 Discharge temp TD2 errorP15 Gas leak detection TD condition Auxiliary codeP19 Way valve operation error P20 High-pressure protective operationJudgment criteria P22 Outdoor fan Ipdu error Auxiliary code 0 ∗P29 P26 Tr short-circuit protection errorDetective circuit error P31Segment Display Function Check procedure in case of stop with troubleHow to read the check monitor Segment display Segment display on the outdoor unit Interface P.C. boardSW01 SW02 SW03 Display contents There is auxiliary code Check code ∗ ∗ ∗ for 3 seconds Data display of outdoor cycle Displayed on each outdoor unit SW03 SW02 Indoor address Segment display aW01 SW02 SW03 Display contents Segment display Sensor CharacteristicsTemperature sensor characteristics Segment display A, BWeekly timer Configuration of Control CircuitWired remote controller Up to 2 units Indoor UnitConnection of wireless remote controller KitCompact 4-way Air Discharge Cassette Type Remote WirelessCassette Type Controller Compact4-way Air Discharge Connection of both remoteMCC-1402 Compact 4-way Air DischargeType CassetteOptional Connector Specifications of Indoor P.C. Board Function Connector Pin Specifications RemarksPreparing work Part name Procedure RemarksDetachments Attachment100 No. Part name Procedure Remarks 101102 Fan guard 1. Detachment No. Part name Procedure103 Bell mouth 1. Detachment104 Fan motor 1. Detachment105 Drain pump 1. DetachmentArrow view B Details of sensor lead wire drawing106 Details of a partExchanger Recover refrigerant gas 107Heat Exchange procedure 10. P.C. Board Exchange ProceduresExchange of P.C. Board for Indoor Service 108Procedure 1 Readout setup contents from Eeprom Remote controller operation diagramProcedure 2 Exchange of P.C. board for service 110Procedure 3 Writing-in of setup contents to Eeprom Eeprom layoutMake a note of the setup contents. Item code list Example 113 Exploded Views and Parts ListCeiling Panel Description211 Compact 4-way Air Discharge Cassette TypeMMU-AP0071MH, AP0091MH, AP0121MH, AP0151MH, AP0181MH 114115 Description Remarks Model Name0071MH 0091MH 0121MH 0151MH 0181MH 116 Description Model NameToshiba Carrier Corporation
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