7-5. Diagnosis Procedure for Each Check Code

Check code

Check code name

 

Cause of operation

 

 

 

[E01]

Communication error between

1. Remote controller inter-unit cable error

 

indoor and remote controller

2. Indoor power error

 

(Detected at remote controller side)

3.

Indoor P.C. board error

 

 

 

 

4.

Remote controller address setup error

 

 

5.

Remote controller P.C. board error

 

 

 

 

Check code

Check code name

Cause of operation

 

 

 

[E03]

Communication error between

No communication from remote controller and

 

indoor and remote controller

communication adaptor

 

(Detected at indoor side)

 

 

 

 

This error is detected when the indoor unit cannot receive a signal from the remote controller. Check communication wires of the remote controllers A and B.

As communication is impossible, this check code [E03] is not displayed on the main remote controller. It is displayed on TCC-LINK central controller.

Is the inter-unit cable of

NO

remote controllers (A/B) normal?

 

 

YES

 

 

 

Is there no disconnection or

YES

connector contact error on harness out

 

of terminal block of indoor unit?

 

 

NO

 

 

 

 

 

 

NO

Is a group control operation?

YES

Correct inter-unit cable of remote controller.

Correct connector connection and check circuit cabling.

Check code

Check code name

 

Cause of operation

 

 

 

 

[E04]

Indoor/Outdoor

1.

Power of outdoor unit was firstly turned on.

 

communication circuit error

2.

Connection error of communication line

 

(Detected at indoor side)

 

between indoor and outdoor

 

 

3.

End terminal resistance setup error on

 

 

 

communication between indoor and outdoor

 

 

4.

Address setup error

 

 

 

 

Is power of each indoor unit turned on?

NO

Check power connection status of indoor unit. (Turn on power again.)

Was power turned on in order

NO

of indoor unit outdoor unit?

 

Turn on power again in order of indoor unit outdoor unit.

65

 

 

YES

 

 

 

 

NO

 

 

Is power applied to remote controller?

AB terminals: Approx. DC18V

 

 

 

YES

 

 

 

 

Is setup of two remote controllers

YES

without main remote controller?

 

 

 

NO

 

Check indoor P.C. board.

Defect Replace

Change one to main/other to sub.

(Remote controller address connector)

 

YES

 

 

 

NO

Is connection (U1/U2 terminals) of

indoor/outdoor inter-unit wire normal?

 

 

YES

 

 

 

 

 

 

Is connector connection from

NO

U1/U2 terminals of indoor/outdoor

 

inter-unit wire normal?

 

Correct inter-unit wire.

Correct connector connection.

Check remote controller P.C. board.

YES

Defect Replace

Is the end terminal resistance

NO

setup of outdoor unit normal?

 

 

YES

 

 

 

 

 

NO

 

 

Correct the end terminal resistance setup.

Check code

Check code name

Cause of operation

[E02]

Remote controller sending error Signal could not be sent to indoor unit.

 

Check the communication wire of the remote

 

controller.

* It is not displayed on 7-segment display of the central control controller.

Is address setup correct?

 

 

 

YES

 

 

 

 

 

NO

Is power applied to fuse (F03)

on indoor P.C. board?

 

 

YES

 

Set up address again.

Check connection of inter-unit wire between indoor and outdoor is correct, and then connect communication line connector on indoor P.C. board (CN40) to CN44 (EMG).

Is communication cabling between

NO

remote controller and indoor unit correct?

 

 

YES

 

 

 

 

 

Sending circuit error

 

inside of the remote controller

 

Replace remote controller.

 

 

 

 

Correct the communication cabling.

YES

Is there no noise, etc?

NO

Check indoor P.C. board.

Defect Replace

Check noise, etc, and eliminate it if any.

For details, refer to “Troubleshooting in test operation”.

Page 64 Page 66
Page 65
Image 65
Toshiba MMU-AP0181MH, MMU-AP0151MH, MMU-AP0091MH, MMU-AP0071MH Diagnosis Procedure for Each Check Code, E03, E04, E02
Page 64 Page 66

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