Check code

Check code name

 

Cause of operation

 

 

 

 

[E16]

Connected indoor units

1.

There are 48 or more connected indoor units.

 

capacity over

2.

Capacity over of total connected indoor units.

 

 

3.

Incorrect setup of indoor/outdoor capacity

 

 

 

 

Auxiliary code : 00 : Capacity over 01 : ~ : Number of connected indoor units

Check code

 

Check code name

 

 

Cause of operation

 

 

 

[E18]

Communication error between

Regular communication between indoor header

 

indoor header and follower

and follower is unavailable.

 

 

 

 

 

 

 

Are remote controller

 

NO

 

 

 

 

 

 

Correct remote controller

 

 

 

 

inter-unit wires (A/B) normal?

 

 

 

inter-unit wire.

 

 

 

 

 

 

 

YES

YES

Is backup operation of outdoor unit being set up?

 

NO

 

 

 

NO

Is No. of connected indoor units correct?

 

 

 

YES

 

 

 

 

 

NO

Is setup of indoor unit HP correct?

 

 

 

YES

 

 

 

 

 

NO

Is total capacity of connected

 

indoor units within 135%? ( 1)

 

 

YES

 

Perform setup of no detection

for capacity over.

Excessive indoor units are connected.

Correct miswiring.

Correct HP setup.

Set capacity of connected

indoor units within 135% of outdoor units.

Is there any disconnection of

connector or wiring from terminal block

of indoor unit?

NO

NO

Is a group control operation?

YES

Are powers of

all indoor units turned on?

YES

Check indoor address.

YES

NO

Correct connection of connector.

Check circuit wire.

Check power connection status

of indoor unit.

Check indoor P.C. board.

Failure Replace

68

For a service P.C. board, check outdoor HP setup.

OK

(Set up jumper 9, 10, 11, and 12.)

 

 

NG

 

 

 

 

 

 

Check outdoor interface P.C. board A’ssy.

Set up outdoor HP.

(Refer “How to exchange interface P.C. board”.)

(∗ 1) When capacity of the outdoor unit is 12HP, up to the maximum capacity 120% of indoor units can be connected.

Correct indoor address.

 

Check code

 

 

Check code name

 

 

Cause of operation

 

 

 

 

 

 

[E19]

 

Header outdoor units quantity error

1. Misconnection of inter-unit cable between

 

 

 

 

 

 

 

 

 

indoor and outdoor

 

 

 

 

 

 

 

 

 

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

 

 

 

 

Auxiliary code : 00: No header unit

02: Two or more header units

Are not communication lines (U1, U2)

YES

 

 

 

 

 

Connect communication line between indoor

between indoor and outdoor connected

 

 

 

 

 

 

and outdoor to one unit per 1 system.

 

to multiple outdoor units?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

Is communication line between indoor and

 

 

Connect communication line between indoor

 

 

 

outdoor connected to one unit per 1 system?

 

 

 

and outdoor.

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reference)

 

 

 

 

 

 

 

Check I/F board.

 

 

 

 

 

 

 

 

 

 

When the power supply of the outdoor unit is firstly

 

 

 

 

 

 

 

 

 

 

 

 

 

 

turned on, the check code [E19 00] is displayed until the

 

 

 

 

 

 

 

power supplies of the indoor units are turned on. However

 

 

 

 

 

 

 

it is not an error. If the power supplies of the indoor units

 

 

 

 

 

 

 

are turned on, the check code is automatically reset.

Page 67 Page 69
Page 68
Image 68
Toshiba MMU-AP0071MH, MMU-AP0181MH, MMU-AP0151MH, MMU-AP0091MH, MMU-AP0121MH service manual E16, E18, E19, Reference
Page 67 Page 69

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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