Check code name

 

 

 

Check code name

 

Cause of operation

 

 

 

 

[F31]

 

Outdoor EEPROM error

1. Outdoor unit power error (Voltage, noise, etc.)

 

 

 

 

 

 

2. Outdoor I/F P.C. board error

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is there any trouble of

 

 

YES

 

 

Check power voltage and line.

 

 

 

 

 

Correct power line.

outdoor unit power supply?

 

 

 

 

 

 

 

 

 

 

Check external noise, etc.

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check I/F P.C. board.

 

 

 

 

 

 

Check code name

Check code name

 

Cause of operation

 

 

 

[H02]

Compressor error (Lock)

1. Outdoor unit power line error

 

 

2.

Compressor circuit system error

 

 

3.

Compressor error

 

 

4.

Refrigerant stagnation in compressor shell

 

 

5.

IPDU P.C. board error

 

 

 

 

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

Check code name

Check code name

 

Cause of operation

 

 

 

[H01]

Compressor breakdown

1. Outdoor unit power line error

 

 

2.

Compressor circuit system error

 

 

3.

Compressor error

 

 

4.

Cause of abnormal overload operation

Is power voltage of

outdoor unit normal? 1

YES

Does voltage drop occur

when other compressor starts?

NO

Does OCR of MG-SW operate?

NO

1 380 – 415V ± 10%

YES

YES

Correct power line.

Reset OCR manually. 3

5. IPDU P.C. board error

NO

73

Auxiliary code : 01: Compressor 1 side

Is power voltage of outdoor unit normal?

YES

Does voltage drop occur

when other compressor starts?

NO

Is connection of wiring or connection of connector on IPDU P.C. board normal?

YES

Is winding resistance

between phases of corresponding

compressor normal? (Note 1)

YES

Is not it an abnormal overload?

NO

02:Compressor 2 side

NO

380 – 415V ± 10%

YES

 

Correct power line.

NO

 

 

 

 

 

 

Correct connector connection or wiring.

 

 

NO

 

 

 

 

 

Compressor error

 

 

YES

 

(Motor burning, etc.)

 

 

 

 

 

Correct cause of overload.

 

 

 

 

 

 

Take off lead cable of compressor.

 

 

1. Check resistance between windings:

 

C

It is normal if there are 0.7 to 0.9 .

S

2.Check insulation between outdoor cabinet and terminal:

It is normal if there are 10M or more.

Is wiring or connector connection

 

NO

 

 

Correct connector connection

 

 

 

 

 

 

 

 

on IPDU P.C. board normal?

 

 

 

 

 

 

 

or wiring.

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is not it an abnormal overload?

 

YES

 

 

 

 

 

 

Correct cause of overload.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

YES

 

 

Is there no refrigerant stagnation

 

 

Correct refrigerant stagnation

 

 

 

Is case heater output normal?

 

 

 

in compressor shell?

 

 

 

 

 

in compressor shell.

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operation starts.

 

 

 

Check case heater.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

Is compressor normal? 2

 

 

 

Compressor error

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

2 Check the following items mainly.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. Existence of abnormal sound and abnormal vibration during operation or starting

 

 

 

 

 

 

Check IPDU P.C. board.

 

2. Abnormal overheat of case during operation or stop time (Never touch with hands.)

3.Current of compressor lead during operation or starting time (No varied change of current) change

3 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 code name

Check code name

 

Cause of operation

 

 

 

 

[H03]

Current detective

1.

Cabling or connector connection error on IPDU P.C. board

 

circuit system error

2.

IPDU P.C. board error

 

 

 

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

 

Check IPDU P.C. board.

Note 1

R

*After checking the output, when connecting the compressor lead again to the compressor terminal, check surely there is no distortion on the Fasten receptacle terminal.

If it is loosened, caulk it with pinchers, etc and then connect

Details of compressor

lead to the terminal firmly.

power connecting section

Wiring or connector connection

NO

Correct connector connection or cabling.

on IPDU P.C. board normal?

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

Check IPDU P.C. board.

 

 

 

 

 

 

 

 

Page 72 Page 74
Page 73
Image 73
Toshiba MMU-AP0071MH, MMU-AP0181MH, MMU-AP0151MH, MMU-AP0091MH, MMU-AP0121MH service manual F31, H02, H01, H03
Page 72 Page 74

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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