Troubleshooting Guide

ElectronicParts(9kmodel)

Product does not operate at all.

(* Refer to Electronic Control Device drawing and Schematic diagram.)

Turn off Main Power

(After 20 seconds)

Turn on Main Power

Does "beeping" sound is made from the Indoor Unit?

NO

Check the voltage of power(About AC 115V, 60Hz)

Main power's voltage

Voltage applied to the unit

Connecting method of Indoor/Outdoor connecting cable

Check PWB Ass'y(Outdoor unit)

-Fuse

-Pattern damage

-Varistor(ZNR01J)

Check the connection housing for contacting

Connector related to CN-POWER

Connector related to CN-FAN

Connector contacting of Outdoor Fan/Compressor

Display PWB Ass'y Check

Connector related to CN-DC/DC

YES

Primarily, the operating condition of Micom is OK.

Check each load(Indoor/Outdoor Fan Motor, Compressor, Stepping Motor) and contacting condition of related connector(including connecting cable of Indoor/Outdoor Unit)

PCB Board Operation Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Items

 

 

 

 

Content

 

 

 

Remedy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Power Transformer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Outdoor unit)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Input Voltage

 

 

- About AC115V±10% - Check the power voltage

 

 

 

• Replace SMPS

 

 

 

 

 

- Output Voltage

 

 

- About DC15V±3

 

 

 

Module

 

 

 

 

 

• IC01D(7812) Output

 

 

• DC +12V

 

 

 

• Replace IC01D

 

 

 

 

 

(Indoor/Outdoor unit)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• IC02D(7805) Output (Indoor unit)

 

 

• DC +5V

 

 

 

• Replace

 

 

 

 

 

IC03D(7805) Output (Outdoor unit)

 

 

 

 

 

 

 

 

IC02D(Indoor unit)

 

 

 

 

 

• IC01A(KIA7036, Reset IC)

 

 

• Voltage of Outdoor unit Micom No. 18,

 

 

 

IC03D(Outdoor unit)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OSC01B(4MHz)

 

 

Voltage of Indoor unit Micom No. 43 and

 

 

 

 

 

 

 

 

 

(Indoor/Outdoor unit)

 

 

soldering condition

 

 

 

• Replace faulty parts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service Manual 51

Page 51
Image 51
Heat Controller DMH09SB-0, DMC18SB-1, DMC12SB-0, DMC09SB-0 Electronic Parts 9k model, Product does not operate at all

DMH12SB-0, DMH18SB-1, DMC24SB-1, DMH24SB-1, DMH09SB-0 specifications

The Heat Controller DMC24SB-1, DMH18SB-1, DMH09SB-0, DMH24SB-1, and DMC18SB-1 are a series of high-efficiency air conditioning systems designed to meet diverse climate control needs. Each model is equipped with advanced technologies to ensure optimal performance, energy efficiency, and user comfort.

One of the standout features across this range is the incorporation of inverter technology. This technology allows the units to adjust the compressor speed based on the desired temperature, significantly reducing energy consumption compared to traditional systems. As a result, users can enjoy lower utility bills while maintaining a consistent indoor climate.

The DMC24SB-1 is particularly notable for its robust cooling capacity, making it ideal for larger spaces. It boasts a sleek design that complements modern interiors while providing efficient air distribution through its multi-directional airflow system. The unit is also equipped with a programmable timer and remote control for added convenience.

The DMH series, including the DMH18SB-1, DMH09SB-0, and DMH24SB-1, offers versatility in terms of size and cooling capacity. The DMH09SB-0 is perfect for smaller rooms, while the DMH24SB-1 can effectively cool larger areas. Each model in the series features a quiet operation mode, ensuring minimal noise when cooling or heating.

The DMC18SB-1 stands out for its dual functionality, providing both heating and cooling options. This model is equipped with an advanced Eco-friendly refrigerant that not only reduces environmental impact but also enhances overall system efficiency. Additionally, it features self-cleaning technology that eliminates dust and allergens, improving indoor air quality.

All models are designed with user-friendliness in mind, featuring clear digital displays and easy-to-navigate controls. Moreover, these heat controllers adhere to the highest energy efficiency ratings, ensuring they meet stringent environmental guidelines.

In summary, the Heat Controller line featuring models DMC24SB-1, DMH18SB-1, DMH09SB-0, DMH24SB-1, and DMC18SB-1 exemplifies cutting-edge heating and cooling solutions. With their advanced technologies, energy-efficient performance, and user-centric designs, these units are well-suited for both residential and commercial applications, offering reliable comfort year-round.