3-3-8 When the 4 way valve (A,B) is not operating

1)Inspection items

(1)Are the 4 way valve A and B under the operating conditions?

(When the COMP A (4 way valve A ) and COMP B (4 way valve B) are on during the heating operating)

(2)Is the power voltage normal?

(3)Is the connecting of 4 way valve A (CN 75) and B (CN 76) good?

2) Inspection sequence

Put off the outdoor unit power and put it on again after 5 seconds.

Select the heating operation of A(B) room by the remote controller.

Has 3 minutes passed after selection of A(B) room heating?

YES

Is the 4 way valve A(B) on?

NO

Is the voltage shown across the 4 way valve A(B) connector

(CN 75, CN 76) ?

NO

Is the pin no 47(46) of IC 04 ( MICOM) at high (DC 5V) ?

NO

Is the 4 way valve A (B) under operating conditions?

NO

Normal

NO

YES

YES

YES

YES

Keep 4 way valve off.

Normal

Defect of RY 76 (RY 77) contact and coil

→Replace the Relay

Defect of IC 06 (IC 07 ) output → Replace

Defect of IC 04(MICOM) - replace the IC 04

or PCB ass’y

*4 way valve operating conditions

(1)During the defrost control, put the 4 way valve A(B) off.

(2)During the heating operation put the 4 way valve A(B) on.

(3)The changeover of heating to cooling : put the 4 way valve off immediately (in case of B and C room).

(4)The changeover of cooling to heating : it is on after 170 seconds delay.

18

Page 18 Page 20
Page 19
Image 19
Samsung AD26B1C13, UD26B1C2, UD18B1C2, AD18B1C09 service manual When the 4 way valve A,B is not operating
Page 18 Page 20

AD26B1C13, AD18B1C09, UD18B1C2, UD26B1C2 specifications

The Samsung AD18B1C09 is an exceptional air conditioning unit that brings together cutting-edge technology and user-friendly design to create a comfortable environment in your home or office. This model stands out for its efficient performance and robust features tailored to meet various climate control needs.

One of the primary highlights of the AD18B1C09 is its impressive cooling capacity. It is designed to deliver rapid cooling even in large spaces, ensuring that every corner of the room reaches the desired temperature quickly. This makes it an ideal choice for areas that experience high temperatures, providing instant relief during hot summer months.

Energy efficiency is another hallmark of the AD18B1C09. With a high Energy Efficiency Ratio (EER), this air conditioner helps users save on electricity bills while minimizing their carbon footprint. The unit is equipped with advanced inverter technology, which adjusts the compressor speed based on the cooling demand. This not only enhances efficiency but also ensures quieter operation compared to traditional air conditioning systems.

The Samsung AD18B1C09 comes with a range of user-friendly features that enhance convenience. Its remote control functionality allows users to operate the unit from a distance, adjusting settings such as temperature, fan speed, and mode with ease. Additionally, smart features like programmable timers and sleep modes optimize energy use and enhance comfort without constant oversight.

Moreover, the unit is designed with a multi-stage filtration system that improves indoor air quality. This system effectively removes dust, allergens, and other impurities from the air, making it a great choice for individuals with allergies or respiratory concerns. The filters are easily accessible for maintenance, ensuring that the air quality remains consistently high.

In terms of design, the Samsung AD18B1C09 features a sleek and modern aesthetic that blends seamlessly with any interior decor. Its compact dimensions allow for versatile installation options, whether mounted on walls or placed in window units, providing flexibility to meet different spatial requirements.

Overall, the Samsung AD18B1C09 air conditioner combines powerful cooling capabilities, exceptional energy efficiency, and user-centric design, making it a top choice for those seeking reliable climate control solutions. This model truly embodies Samsung's commitment to innovation and quality in the realm of home appliances.
Top Page Image Contents