Check code Main Outdoor 7-segment display

Check code

Main	Outdoor 7-segment display
remote
remote	Check code	Auxiliary code
controller	Check code	Auxiliary code

H07	H07	—

H08	H08	01: TK1 sensor error
		02: TK2 sensor error
		03: TK3 sensor error
		04: TK4 sensor error

H14

—

Detected	Check code name	Status		Error detection condition		Check item (position)
position	Check code name	Status		Error detection condition		Check item (position)
position
I/F	Protection for oil	All stop	The operating compressor detected oil shortage		<Check all the outdoor units in the corresponding line.>
	level drop detection		continuously for 2 hours.		•	Check full opening of service valve of balance pipe.
					•	Check full opening of service valve of balance pipe.
					• Check connection and installation of TK1, TK2, TK3, and TK4 sensors.
					• Check characteristics of TK1, TK2, TK3, and TK4 resistance values.
					•	Check gas leak and oil leak in the same line.
					•	Check refrigerant stagnation in compressor.
					• Check error of SV3A, SV3B, SV3C, SV3D, and SV3E valves.
					•	Check clogging of oil separator oil return circuit.
					•	Check clogging of oil-equation circuit.
					<Check clogging of oil equation pipe between compressors.>
					• Check TS1, TS2 sensors (Miswiring and misinstallation of TS1 and TS2)
					•	Check leakage of SV6 circuit.
					•	Check FS unit.
						Leakage of check valve of bypass between liquid pipe and discharge gas pipe
						Mispiping of discharge/suction gas connection
						Miswiring of SVD/SVS valve/Misinstallation of coil
					•	Check whether there is no setup missing of indoor unit in all cooling operation mode

I/F	Oil level detective	All stop	•	Resistance value of sensor is infinite or zero.	•	Check connection of TK1 sensor connector.
	temp sensor error			(Open/Short)	• Check characteristics of TK1 sensor resistance value.
					• Check characteristics of TK1 sensor resistance value.
					• Check outdoor P.C. board (I/F) error.

		All stop	•	Resistance value of sensor is infinite or zero.	•	Check connection of TK2 sensor connector.
				(Open/Short)	• Check characteristics of TK2 sensor resistance value.
					• Check characteristics of TK2 sensor resistance value.
					• Check outdoor P.C. board (I/F) error.

		All stop	•	Resistance value of sensor is infinite or zero.	•	Check connection of TK3 sensor connector.
				(Open/Short)	• Check characteristics of TK3 sensor resistance value.
					• Check characteristics of TK3 sensor resistance value.
					• Check outdoor P.C. board (I/F) error.

		All stop	•	Resistance value of sensor is infinite or zero.	•	Check connection of TK4 sensor connector.
				(Open/Short)	• Check characteristics of TK4 sensor resistance value.
					• Check characteristics of TK4 sensor resistance value.
					• Check outdoor P.C. board (I/F) error.

I/F	Compressor 2 case	All stop	Compressor 2 case thermostat operated.		•	Check compressor 2 case thermo circuit. (Connector, cable, P.C. board)
	thermo operation				• Check full opening of service valve. (Gas and liquid side)

					• Check outdoor PMV clogging. (PMV1, 2)
					• Check SV42 valve leak.
					•	Check miscabling/misinstallation of SV41 and SV42.
					• Check valve opening of indoor PMV.
					•	Check 4-way valve error.
					•	Check refrigerant shortage.
					• Check SV11 circuit. (Wiring, OFF at one side only)
					•	Check mispiping of discharge gas/suction gas main pipe.
					•	Check Flow selector unit.
						Check leakage of SVD valve and SVS valve. (Check leakage of SVDD valve and SVSS.)
						Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring between
						FS unit and indoor unit, and connection of connectors.
						Check miswiring of SVS/SVD valves.

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.

Check code

Main

Outdoor 7-segment display

remote

Check code

Auxiliary code

H07

<Check all the outdoor units in the corresponding line.>

<Check clogging of oil equation pipe between compressors.>

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