Troubleshooting Guide

ElectronicPartsTroubleshooting Guide

Refer to electronic contorol device drawing & schematic diagram.

Trouble 1

The Product doesn’t operate at all.

Turn off the main power and wait until LED on outdoor PCB is off.

Turn on the main power again.

Does "Beeping" sound is made from the indoor unit?

NO

Check the voltage of power(AC208V/AC230V, 60Hz).

The voltage of main power.

The voltage applied to the unit.

The connecting method of Indoor/Outdoor connecting cable (each color)

The P.W.B. Ass'y

(Fuse, Noise Filter, Power Transformer, IC01D, IC02D, etc.)

YES

Primarily, the operating condi- tion of Micom is O.K.

Check CN-DISP1

The operation check of the P.C.B. Ass'y

 

 

Procedure

 

Specification

 

Remedy

 

 

 

 

 

 

 

1)

The input voltage of power trans-

1)

AC230V ± 30V

1)

Replace

 

 

former.

 

: Check the rated voltage

 

power transfomer.

2)

The output voltage of power

2)

15V ± 1.5V

2)

Replace

 

 

transformer.

 

 

 

power transfomer.

3)

IC01D(7812)

3)

DC12V

3) Replace IC01D.

4)

IC02D(7805)

4)

DC5V

4) Replace IC02D.

5)

IC01A(KIA7036)

5)

The voltage of micom pin 29

5)

Replace IC01A.

 

 

 

 

: DC4.5V

 

 

 

 

 

 

 

 

 

Service Manual 67

Page 67
Image 67
LG Electronics AMNC123DEA0(LMN120CE) service manual Electronic Parts Troubleshooting Guide, Procedure Specification Remedy

A3UH363FA0(LMU360HE), AMNC123DEA0(LMN120CE), AMNC093D4A0(LMN090CE), AMNH123DEA0(LMN120HE), A3UC363FA0(LMU360CE) specifications

LG Electronics is renowned for its innovation in the home appliance sector, particularly in air conditioning systems. Among its diverse range, the AMNC123APM0, A3UC363FA0, AMNH123DEA0, AMNC093D4A0, and AMNC123DEA0 model series stand out for their advanced features and energy efficiency.

The AMNC123APM0, also referred to as LMAN120CNS, offers a powerful air conditioning solution ideal for medium to large spaces. Featuring a sleek design, it combines aesthetics with functionality. This model utilizes LG's inverter technology, which helps maintain a consistent temperature while significantly reducing energy consumption. Additionally, it comes equipped with a dual inverter compressor that operates quietly, making it perfect for residential settings.

The A3UC363FA0, or LMU360CE, is another standout model that caters to the installation needs of multi-zone systems. Its flexibility allows users to connect multiple indoor units, ensuring efficient air distribution across different spaces. This model also features advanced filtration systems that improve indoor air quality by reducing allergens and other harmful particles.

AMNH123DEA0, branded as LMN120HE, introduces enhanced energy efficiency through its intelligent energy management systems. This unit is designed with user-friendly controls and smart technology to optimize performance based on user preferences. Its compact design makes it suitable for smaller spaces while still delivering powerful cooling and heating functions.

The AMNC093D4A0, known as LMN090CE, is perfect for residential applications where space is a consideration. It boasts a high SEER (Seasonal Energy Efficiency Ratio) rating, indicating low energy consumption while still providing optimal cooling. The model is equipped with a variety of operational modes, including dehumidification and fan-only options.

Finally, the AMNC123DEA0, or LMN120CE, rounds out this impressive series by offering versatile installation options and silent operation. This model is particularly noted for its robust cooling capabilities and ease of maintenance, ensuring that homeowners can enjoy year-round comfort with minimal disruption.

In summary, LG Electronics has blended efficiency, performance, and design in its latest air conditioning models. With features like inverter technology, multi-zone capabilities, advanced filtration, and quiet operation, these systems cater to modern home cooling and heating requirements while promoting energy conservation. As such, they represent a significant leap in HVAC technology, providing reliable comfort and improved indoor air quality.