Check code

Check code name

 

Cause of operation

 

 

 

[E31]

IPDU communication error

1. Connection error of communication line

 

 

 

between IPDU and I/F P.C. board

 

 

2.

I/F P.C. board error

 

 

3.

IPDU P.C. board error

 

 

4.

External noise

 

 

 

 

Auxiliary code :

 

 

 

01: IPDU1 error

02: IPDU2 error

 

 

Check code

 

Check code name

 

 

Cause of operation

 

 

 

 

 

 

[F01]

 

Indoor TCJ sensor error

TCJ sensor Open/Short

 

 

 

 

 

 

 

Is TCJ sensor connector (CN102: Red)

NO

 

 

 

 

 

Correct connection of connector.

 

 

 

on indoor P.C. board normally connected?

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03: IPDU1, 2 error

04: Fan IPDU error

05: IPDU1, fan IPDU error

06: IPDU2, fan IPDU error

07: All IPDU error or communication line error between IPDU-I/F P.C. boards, or outdoor I/F P.C. board error ∗ If the fan IPDU is abnormal, be sure to check the voltage output on the fan power supply P.C. board.

Are characteristics of TCJ sensor

resistance value normal?

YES

Check indoor main P.C. board.

Defect Replace

NO

Replace TCJ sensor.

Indoor unit temperature sensor characteristics

See Characteristics-2.

70

Is jumper lead setup of the outdoor I/F P.C. board correct?

(Jumper 7, 8, 9 ON)

YES

Are communication connectors

between I/F, fan power supply board, and IPDU connected?

NO

Is there no disconnection of communication line between I/F, fan power supply board, and IPDU?

NO

NO

Connect the jumper lead.

YES

Correct connection of connectors.

YES

Replace communication line.

Check code

 

Check code name

 

 

Cause of operation

 

 

 

 

 

 

[F02]

 

Indoor TC2 sensor error

TC2 sensor Open/Short

 

 

 

 

 

 

 

Is TC2 sensor connector (CN101: Black)

NO

 

 

 

 

 

Correct connection of connector.

 

 

 

on indoor P.C. board normally connected?

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is there voltage deflection between

4 and 5 pins of CN600 on I/F P.C. board?

(Measurement with tester: DC 0 to 5V, 5 pin GND)

YES

Is there voltage deflection between

3 and 5 pins of CN600 on I/F P.C. board?

(Measurement with tester: DC 0 to 5V, 5 pin GND)

YES

NO

I/F P.C. board error

NO

IPDU P.C. board error

When IPDU (No.1, No.2) and

three fan IPDU do not return communication

Are characteristics of TC2 sensor

resistance value normal?

YES

Check indoor main P.C. board.

Defect Replace

NO

Replace TC2 sensor.

Indoor unit temperature sensor characteristics

See Characteristics-2.

On the fan power supply P.C. board,

NO

1) CN503: Between 1 and 5 pins 12V

 

2)CN503: Between 2 and 5 pins 7V

3)Between +5V and GND at the side of CN505: 5V

YES

Replace P.C. board according to auxiliary code.

Replace fan power supply P.C. board.

Auxiliary code

P.C. board to be replaced

01

IPDU1

 

 

02

IPDU2

Check code

Check code name

 

 

Cause of operation

 

 

 

 

 

[F03]

Indoor TC1 sensor error

TC1 sensor Open/Short

 

 

 

 

 

 

Is TC1 sensor connector (CN100: Brown)

NO

 

 

 

 

 

Correct connection of connector.

 

 

 

on indoor P.C. board normally connected?

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

03

IPDU1, 2

04

Fan IPDU

 

 

05

IPDU1, fan IPDU

 

 

06

IPDU2, fan IPDU

 

 

07

IPDU1, 2, fan IPDU, I/F

Are characteristics of TC1 sensor

resistance value normal?

YES

Check indoor main P.C. board.

Defect Replace

NO

Replace TC1 sensor.

Indoor unit temperature sensor characteristics

See Characteristics-2.

Page 69 Page 71
Page 70
Image 70
Toshiba MMU-AP0181MH, MMU-AP0151MH, MMU-AP0091MH, MMU-AP0071MH, MMU-AP0121MH service manual E31, F01, F02, F03
Page 69 Page 71

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.
Top Page Image Contents