HVAC Service Call: LG MULTI V 4 Error Code CH26 Repair (Inverter Compressor Overcurrent) CH29 Error
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- Опубликовано: 22 окт 2024
- HVAC Service Call: LG MULTI V 4 Error Code CH26 Repair (Inverter Compressor Overcurrent) LG MULTI V IV Compressor & Inverter Board Replacement (LG MULTI V 5 Repair) HVAC(Heating, Ventilation, Air Conditioning) Service Call: LG Multi V IV Error Code CH29 (Inverter Compressor Over Current) Error Code 291 / LG MULTI V 5 ERROR CODE CH29 - Outdoor Unit Inverter Compressor Over Current ( Outdoor Unit Inverter Compressor Fault Or Drive Fault) LG Troubleshooting / HVAC VRF VRV Training #HVAC #LG #JUMPERMANTECH
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Hey jumper man. Hope all is well. In my experience of dealing with LG Multi and Mitsubishi or. Daikin. When you lose that many compressors and or vfd compressors boards. We always find that in the original installation. Either there is a trap situation in which how the air handler piping was done has crated a trap not allowing oil to return back to the compressors causing the compressors to over heat. Same with lack of suction super heat via short of refrigerant. Turn the old compressor over see how much oil comes out. That will tell you. But definitely go over every inch of the piping. One to check for traps two to measure proper charge.
Valuable advice
Hello, your work is very excellent and professional. I work in this field. Regarding your question regarding this building, the main reason for these problems in the system is poor installation, and the most important reason may be welding without nitrogen and errors in the process of installing copper pipes. Thank you.
Might be beneficial to enable the Forced Oil Return mode in the ODU's by turning on DIP switch 5 -> Go to SVC mode -> Enable SE 5 by setting it to 01 instead of oFF. This forces the unit to perform the oil return operation to the ODU if the oil level sensor ever reads low.
Those condensers look extremely close, I wonder when they run at the same time airflow is compromised, this could be something you could consider, I've had the issue before.
You are definitely the man, great job.
Hi I very like your video , and can you let me know : First time you open the liquid side charging refrigerent into the unit , untill when you turn the unit on , and continous charging till the end , can you explains more detail about that ? Thanks
I told you in the last video that another one of those LG's was plotting it's failure haha - wonder if you can get some kind of data logger from LG to record all sensor readings during a typical hot and cold day to see if anything comes back as risky to system health?
Since you add new refrigerant, what do you do with the old recovered refrigerant?
nice work and where are you from
Great video, waiting to hear from tech support, just a point which comes to mind is there a considerable drop in voltage when the unit is running?
Wires entering the unit look rather thin compared to the wires within the unit itself, post incoming supply terminal block.
That's an excellent job! You made mention of lgtechsupport, can you just give a link to the material given to you, I want to go through it for better understanding and lg phone number?
I work with a lot of LG. Do they have oil traps on the roof. Take a minute to pull up the installation manual. Read regarding piping. Inspect the piping open up some ceiling access and locate the BCs see if piping is incorrect. Maybe one of the indoor units exceeds the pipe length. Once you get all the info and have some sort of idea how the installation is. Call Lg and explain to them
Thanks for a very interesting video! You did a great job with the thermal transfer compound.; that should work very well transferring heat. From the Service Manual, the board you replaced is the Converter Board not the Inverter Board. The Converter Board converts the incoming AC to DC to be passed on to the compressor and fan Inverter Boards. Is it possible that a bad Inverter Board for the Compressor is causing both the Compressor and Converter Board to fail?
I also have another thought that came from what you discovered with the strainers outside the units with nothing left inside. Having a look through the hydraulic diagrams shows six internal strainers. If the external protection is non-existent then is there some clogging of any strainers internally? This is assuming that the pipework with the strainers in that condition is used by this particular system, or at all.
Thinking about compressor lubrication, are the Strainer and Solenoid Valve in the Oil Return line between the Accumulator Receiver and the Compressor both functioning as they should? Is the Check Valve between the Oil Separator and Compressor working correctly allowing oil to return to the compressor? If it is not then is too much oil entering the main pipework and starving the compressor?
According to the service manual I found, there are two oil return systems:
- A high pressure centrifugal one that returns oil to the compressor through its own injector pipe which prevents mixing of oil and refrigerant on the suction side of the compressor.
- There is also a Smart Oil Control system that monitors the oil level inside the compressor and initiates an oil return cycle to the Compressor when the oil level is too low. Timed cycles are unnecessary and the Compressor is protected from running with too low an oil level.
Is it possible, given there was oil in strainers you found, that there is a fault in the Smart Oil Control system such as the functioning of the return cycle?
I hope my thoughts and ideas may be of some help to you. Best regards and I wish you success in finding a solution.
Where l can find information over this system
Is a good idea to probably get an LGMV Module to see what the system is doing.
What was the total hours you had from start to finish? Nice job👍
Getting pretty good at this 😂 good job man.
Great job JMT. Thanks for sharing w us this interesting and helpful vid. 👏
Good job Jumper.
Jmt love this job site always fun to change compressor and inverter boards 😂 master tech
By the way great Job again 👍👍👍
Check the section of the input wires to the machine, it seems that the section is too small and that is where the problems with that equipment can come from.
Great Video. Thank you for sharing
Good job Superman Teck
Honeyyyy, i'm back!
Depends when the compressor was manufactured. LG compressors has plastic parts inside which collapse when there is no perfect world. They aren't as good as tecumseh
Great job JMT
Love your vids!
👏🏼👏🏼👏🏼
What meggohm readings did you have?
My thoughts as well re Dimas comments.
Great video brother !!!!
Leave the jacket off. It just suppresses the compressor noise which should not be an issue on the roof. May be contributing to compressor overheating.
Compressors are designed to run with the jacket on. The cooling is done by the suction gas. The jacket protects from the cold along with the cch.
Taking the jacket off isn't going to solve or help
This is an oil return issue. It needs a full survey and probably re-piping
Maybe they are very close to each other
Nicee!!!
At this point this Model seems like it's problematic 😅
Vrf always compresses damage..