Toshiba MMU-AP0121MH, MMU-AP0181MH E20, E23, E25, E26, ∗ 1 How to clear the error, E28

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Check code

Check code name

Cause of operation

 

 

 

[E20]

Unit connected to other line

When starting automatic indoor address, a

 

during automatic address

device in other line is connected.

 

 

 

Auxiliary code : 01: Connection of outdoor in other line 02: Connection of indoor unit in other line

Separate the wire between lines according to address setup method.

Check code

Check code name

 

Cause of operation

 

 

 

[E23]

Communication sending error

1. Inter-unit cable connection error between

 

between outdoor units

 

outdoor units

 

 

2.

Communication connector connection error

 

 

 

between outdoor units, I/F P.C. board error

 

 

3.

End terminal resistance setup error between

 

 

 

outdoor units

 

 

 

 

Check code

Check code name

Cause of operation

 

 

 

[E25]

Duplicated address setup of

Addresses are duplicated by manual setting of

 

terminal outdoor units

outdoor address

 

 

 

Never set up the outdoor address manually.

Check code

Check code name

Cause of operation

[E26]

Decrease of connected

1. Outdoor unit backup setup

 

outdoor units

2.

Outdoor power error

 

 

3.

Communication line connection error between

 

 

 

outdoor units

 

 

4.

Connector connection error for communication

 

 

5.

Outdoor I/F P.C. board error

Auxiliary code : No. of outdoor units which received signals normally

YES

Is there no miscabling or

disconnection on communication line

between outdoor units? (1)

NO

YES

NO

Correct communication line.

Is outdoor unit setting backup?

NO

NO

Is main power of follower unit turned on?

YES

Clear the error, and then start operation. (*1)

Turn on the main power supply.

69

Is connection of CN03 connector on outdoor I/F P.C. board normal?

YES

Correct cabling of cable connector.

Is communication line between

outdoor units connected normally?

YES

Is communication connector (CN03)

NO

 

Correct connection of communication line.

NO

 

 

 

 

 

 

Correct connector connection.

 

 

Is not main power of

outdoor unit turned off?

NO

Is the end terminal resistance

between outdoor units turned on?

(SW30 Bit 1)

YES

Turn on main power of outdoor unit.

NO

Turn the end terminal resistance to ON.

between follower outdoor units connected?

YES

Check I/F P.C. board.

(Communication connector: CN03)

(∗ 1) How to clear the error

Set SW01/SW02/SW03 on I/F P.C. board of header unit to 2/16/1, and push SW04 for 5 seconds or more. (7-segment display: [Er.] [CL])

YES

Did power failure occur?

NO

Is there no noise source, etc?

NO

Check outdoor I/F P.C. board.

Defect Replace

YES

Clear check code.

YES

Check and eliminate noise, etc

(∗ 1) In this model, only one outdoor unit is provided to one refrigerant line. Be sure to check there is no communication connection with outdoor unit in the other refrigerant line.

•In this model, only one outdoor unit is provided to one refrigerant line. Be sure to check there is no communication connection with outdoor unit in the other refrigerant line.

Check code

Check code name

Cause of operation

 

 

 

[E28]

Terminal outdoor unit error

Terminal unit error

 

 

 

Auxiliary code : Detected outdoor unit number

SAn error occurred on the terminal unit. Confirm the check code of the terminal unit using 7-segment display on the I/F P.C. board of the terminal unit and check it according to the diagnostic procedure for each check code.

<How to specify the terminal outdoor unit on which error occurred>

Under condition that [E28] is displayed on the 7-segment display of the header unit, when pushing SW04 for 1 second or more, the fan of the outdoor unit which stopped due to the error rotates. If pushing SW05 alone, fan running is released.

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Contents Compact 4-Way Air Discharge Cassette Type Contents Safety Caution Catch the inner cables Check the following items after reinstallationFire is caused at user’s side Metal section Earth positionPipe Materials Safety Caution Concerned to New RefrigerantPiping Flare nutConditioner installation R410A Conventional air Air conditioner installationTools General tools Conventional tools can be usedEnvironment Recharge of Refrigerant4mm-hexagonal wrench is required Cylinder with siphonWired remote Space required for Installation and servicingConstruction Views External Views Drain-up standing-up sizeFor Indoor unit Wiring DiagramMCC-1402 Control P.C. boardParts Rating Parts RatingName of Each Part ModelDisplay section Parts Name of Remote ControllerOperation section Remote controller sensorButton Wind direction and SwingCorrect Usage Turn on the main power switch and/or the leakage breakerPreparation StopAutomatic Operation Super Heat Recovery Type Only When restarting the operation after stopStart Timer operation Timer OperationCancel of timer operation To select SET TimeHow to set up the air direction Adjustment of Wind DirectionHow to start swinging How to stop swingingInformation Air Conditioner Operations and Performance Standby When the Following Symptoms are FoundNew Refrigerant Air Conditioner Installation Precautions for SafetyTo Disconnect the Appliance from Main Power Supply 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 ceiling panel Sold separately Ceiling opening and installation of hanging boltsInstallation of hanging bolt Installation of remote controller Sold separatelyDrain Piping Work Refrigerant Piping Piping material and dimensionsThermal insulating process Permissible pipe length and permissible height differenceConnection of refrigerant pipe Electric WorkAirtight test/Air purge, etc Open fully valves of the outdoor unit Gas leak checkIndoor unit power supply *1 Power supply specificationsIndoor/Outdoor inter-unit wiring, Central controller wiring Remote controller wiring *4Applicable Controls Case of remote controller-less Group control Case of installation to high ceilingChange of lighting time of filter sign Increased heating effectCase of wireless remote controller How to execute test operationCase of wired remote controller Test RUNConfirmation of error history TroubleshootingCheck code list Confirmation and check Check methodError detected by TCC-LINK central control device TroubleshootingDaily maintenance MaintenanceNew check code Way Air Discharge Cassette TypeFunctional part name Functional outline Refrigerating Cycle DiagramOutline of specifications Remarks Control SpecificationsRemote controller Control outline Command Control OutlineValue Reset conditionsTCB-AX21E Central control mode 1 Cannot operate Central control modeCentral control mode 4 Cannot select mode Applied Control Procedure Execute the setup operation while the unit stopsHEAT, Heat → Cool Description At shipmentApplied Control in Indoor Unit Indoor unit capacityRemote location ON/OFF control box TCB-IFCB-4E Wiring Ventilating fan control from remote controllerFunction OperationUsing the setup temp Power peak-cut from indoor unitButton, set to the setup data Leaving-ON prevention controlTroubleshooting Summary TroubleshootingBefore troubleshooting Troubleshooting procedureCheck Method Check code listAuxiliary code Judging deviceSensor block display MG-SWCheck code Outdoor 7-segment display Auxiliary code Error detected by TCC-LINK central control deviceCheck code Case of wired remote controller RBC-AMT31E Troubleshooting by Check Display on Remote ControllerConfirmation of error history Procedure DescriptionCase of central remote controller TCB-SC642TLE Outdoor 7-segment display Check codeCheck code Auxiliary code RemoteCheck code Setup method of No. capacity-over DetectionMain Outdoor 7-segment display Remote Convenient functionsCheck code Auxiliary code Main Outdoor 7-segment displayRemote DetectedCheck item position Remote Check codeStatus Error detection condition Check item position Detected MainPosition Remote H07 Check code Main Outdoor 7-segment displayCheck all the outdoor units in the corresponding line Check clogging of oil equation pipe between compressorsH16 Check code Main Outdoor 7-segment display RemoteL30 Detected indoor address L31 P01 P03 P04 TS error judgment standard temperature NameHeating Remote Check code Auxiliary code Outdoor 7-segment display Check code name Error detection condition Check item positionDevice Check code Outdoor 7-segment display Detected positionDisplay on Central controlHow to check resistance of compressor winding How to check inverter outputHow to check the outdoor fan motor Measured position CriteriaE03 Diagnosis Procedure for Each Check CodeE04 E02E07 E06 Decreased number of indoor unitsE12 E08E15 E09 Duplicated masterE18 E16E19 ReferenceE20 ∗ 1 How to clear the errorE23 E25F01 E31F02 F03F05 TD2 sensor error F04 TD1 sensor errorF06 TE1 sensor error F08 To sensor errorF15 Outdoor temp sensor miscabling F29 Indoor other errorTE1, TL F23H02 F31H01 H03H06 Low-pressure protective operation Leakage check for SV3C valve Clogging for SV3E valveClogging check for SV3D valve H08 Clogging check for oil-equalization circuitTK3 temperature detective circuit error Oil level detective circuit system errorL04 H16 TK4 temperature detective circuit errorL05 L03L10 L07 Group line in individual indoor unitL17 L08L29 L18L20 L28L30 Interlock in indoor unit P01 Indoor fan motor errorP03 L31P04 Actuation P05 Open phase, negative phaseHigh-pressure SW Auxiliary code Compressor 1 sideP10 Indoor overflow error P07 Heat sink overheat errorIndoor fan motor error P12P15 P13 Outdoor liquid back detection error 1. PMV1/PMV2 errorGas leak detection TS condition Auxiliary codeP15 Gas leak detection Discharge temp TD2 errorP17 TD condition Auxiliary codeP19 Way valve operation error P20 High-pressure protective operationJudgment criteria Auxiliary code 0 ∗ P22 Outdoor fan Ipdu errorDetective circuit error P26 Tr short-circuit protection errorP29 P31How to read the check monitor Segment display Check procedure in case of stop with troubleSegment Display Function Segment display on the outdoor unit Interface P.C. boardSW01 SW02 SW03 Display contents There is auxiliary code Check code ∗ ∗ ∗ for 3 seconds SW03 SW02 Indoor address Segment display a Data display of outdoor cycle Displayed on each outdoor unitTemperature sensor characteristics Sensor CharacteristicsW01 SW02 SW03 Display contents Segment display Segment display A, BWired remote controller Up to 2 units Configuration of Control CircuitWeekly timer Indoor UnitConnection of wireless remote controller KitCompact 4-way Air Discharge Cassette Type Cassette Type Controller WirelessRemote Compact4-way Air Discharge Connection of both remoteType Air DischargeMCC-1402 Compact 4-way CassetteFunction Connector Pin Specifications Remarks Optional Connector Specifications of Indoor P.C. BoardDetachments Part name Procedure RemarksPreparing work Attachment100 101 No. Part name Procedure Remarks102 103 No. Part name ProcedureFan guard 1. Detachment Bell mouth 1. DetachmentFan motor 1. Detachment 104Drain pump 1. Detachment 105106 Details of sensor lead wire drawingArrow view B Details of a partExchanger Recover refrigerant gas 107Heat Exchange of P.C. Board for Indoor Service 10. P.C. Board Exchange ProceduresExchange procedure 108Remote controller operation diagram Procedure 1 Readout setup contents from Eeprom110 Procedure 2 Exchange of P.C. board for serviceEeprom layout Procedure 3 Writing-in of setup contents to EepromMake a note of the setup contents. Item code list Example Ceiling Panel Exploded Views and Parts List113 DescriptionMMU-AP0071MH, AP0091MH, AP0121MH, AP0151MH, AP0181MH Compact 4-way Air Discharge Cassette Type211 114115 Description Remarks Model Name0071MH 0091MH 0121MH 0151MH 0181MH Description Model Name 116Toshiba Carrier Corporation

MMU-AP0181MH, MMU-AP0071MH, MMU-AP0091MH, MMU-AP0151MH, MMU-AP0121MH specifications

The Toshiba MMU-AP series, consisting of models MMU-AP0121MH, MMU-AP0151MH, MMU-AP0091MH, MMU-AP0071MH, and MMU-AP0181MH, represents a significant advancement in the realm of power management and energy efficiency for a variety of applications. These modules are designed to optimize performance while ensuring minimal energy consumption, making them suitable for both commercial and industrial uses.

One of the standout features of the MMU-AP series is its intelligent power management technology. This feature allows for adaptive energy distribution based on real-time demands. By leveraging precise control algorithms, the modules can adjust their output to match the specific requirements of connected devices, ultimately leading to reduced power loss and increased efficiency. This adaptability not only benefits end-users by lowering operational costs but also contributes to a greener environment by minimizing waste.

The versatility of the MMU-AP series is evident in its wide range of operational capabilities. These power modules are designed to work effectively in various voltage levels and load conditions. With input voltage ranges suitable for standard industrial environments, they can easily be integrated into existing systems, enhancing overall functionality without requiring extensive modifications.

Moreover, the compact design of the MMU-AP modules is another notable characteristic. Their size and light weight facilitate easier installation and integration into tight spaces, making them ideal for applications where real estate is a premium. This compact profile does not compromise performance, as these modules are engineered to deliver robust power output while maintaining thermal efficiency.

In terms of reliability, the MMU-AP series is built with high-grade components that withstand harsh operating conditions. With features such as over-voltage protection, short-circuit protection, and thermal shutdown capabilities, users can trust that their equipment would operate safely and efficiently, thereby extending the lifespan of both the power modules and the devices they serve.

Finally, Toshiba’s commitment to innovation ensures that the MMU-AP series incorporates cutting-edge technology. The series supports communication protocols that enable seamless integration with smart systems, paving the way for advanced monitoring and control functions. This levels up the user experience, providing insights into performance and diagnostics that are crucial for uptime and reliability in demanding environments.

In conclusion, the Toshiba MMU-AP series offers a blend of efficiency, adaptability, and advanced technology, making it a valuable asset for various industrial and commercial applications. Its intelligent design and robust features ensure that users can optimize energy use while maintaining high performance and reliability.
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