Self-diagnosis function

Error

Error Type

Error Point

 

Main Reasons

No.

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Auto addressing is not done

 

 

 

2. transmission cable is not connected

 

 

 

3.

Short circuit of transmission cable

 

Indoor & Outdoor unit

No signal transmission

4.

Indoor unit transmission circuit fault

05

between indoor & outdoor

5.

Outdoor unit transmission circuit fault

transmission error

 

units.

6.

Not enough distance between power and trans-

 

 

 

 

 

 

mission cable?

 

 

 

 

 

Error diagnosis and countermeasure flow chart

No

Is total number of indoor

No

Does all the IDUs show

units connected displayed

 

same error code CH05?

 

after auto addressing?

 

 

 

Yes

 

 

 

END

 

Replace the PCB of indoor unit displayed error

Re-connect after check the transmission cable of indoor unit displayed error**

Is outdoor PCB LED blinking?

Yes

Check if the

transmission cable is

No

Check the main power

No

 

supply at the ODU

 

terminal block?

 

Yes

 

No

Is main circuit breaker off?

Yes

Improper connection of power supply cable

Main power supply problem

Replace outdoor PCB after checking

Replace TRANS after checking

Check the insulation of inverter

/constant compressor and replace if required

Check the capacity of main circuit breaker and replace if required

If all ok,

Turn on main circuit breaker

properly connected No to indoor / outdoor

terminal block?*

Yes

Re connect transmission cable

Outdoor PCB fault

Replace after checking

Indoor PCB fault

Replace after checking

*(Note1) Transmission from IDU is normal if voltage fluctuation(-9V ~ +9V) exists when checking DC voltage of communication terminal between IDU and ODU

*If the DC voltage between transmission terminal A, B of indoor unit is fluctuate within (-9V~+9V) then transmission from outdoor unit is normal

Copyright ©2008 LG Electronics. Inc. All right reserved.

- 104 -

Only for training and service purposes

LGE Internal Use Only

 

Page 104
Image 104
Haier R410A service manual 104

R410A specifications

Haier R410A is a refrigerant that has gained significant attention in the HVAC industry due to its environmental benefits and efficient performance. As a hydrofluorocarbon (HFC) refrigerant, R410A is designed to replace the older R22 refrigerant, addressing environmental concerns and aligning with global initiatives to phase out ozone-depleting substances.

One of the primary features of Haier R410A is its low environmental impact. R410A has a significantly lower ozone depletion potential (ODP) compared to R22, making it a more environmentally friendly option. Additionally, it has a global warming potential (GWP) that, while still higher than natural refrigerants, is considered acceptable in terms of modern refrigerant usage and regulatory compliance.

The performance characteristics of R410A are another key point of interest. This refrigerant operates at higher pressure levels compared to R22, which allows for improved heat transfer efficiency. This results in enhanced cooling and heating capabilities, enabling HVAC systems designed for R410A to deliver superior performance in various climate conditions. The higher efficiency translates to lower energy consumption, meaning users can enjoy a comfortable indoor climate while keeping energy bills in check.

In terms of technology, Haier has integrated R410A into a range of air conditioning and refrigeration systems, showcasing the refrigerant’s compatibility with modern HVAC designs. Many of Haier’s products feature advanced inverter technology, which optimizes energy use by adjusting the compressor speed according to the cooling demand. This not only improves efficiency but also extends the lifespan of the equipment.

Moreover, Haier R410A systems are often equipped with smart technologies such as Wi-Fi connectivity and intelligent control features. These innovations allow users to monitor and control their HVAC systems remotely, promoting user convenience and energy savings.

Safety is another characteristic of R410A systems. Although R410A is non-toxic and has a very low flammability risk, it requires appropriate handling procedures due to its higher pressure. Haier adheres to rigorous safety standards in the design and manufacturing of its HVAC units, ensuring that end-users can operate their systems with peace of mind.

Overall, Haier R410A refrigerants represent a significant step forward in achieving efficient, environmentally responsible heating and cooling solutions. With their advanced technology, excellent performance, and commitment to safety, Haier's R410A systems have become a preferred choice among consumers looking for reliable HVAC solutions that also consider ecological impact.