Author Topic: Need help with a LG LinearCompressor (Read 6234 times)

Blanton · « **on:** July 10, 2019, 05:54:21 PM »

Hey guys I need help for the LG linear compressor went out in a service call and had the normal linear compressor failure running not compressing. I ordered a compressor went back out recover the refrigerant replaced filter dryer Brazed in a the new compressor. I did flush the system with nitrogen prior to putting in the new compressor. Refilled it with my fieldpiece scale. The compressor runs for five seconds turns off three minutes later it runs for five seconds and turns off. I did go direct to the compressor with 120 V and it ran and compressed fine. But it won’t run for more than five seconds when everything is hooked up properly. Any ideas?

It’s a Kenmore LG this is the model number 79571073010

Really appreciate any help you can give me!

Izzy98 · « **Reply #1 on:** July 16, 2019, 07:48:37 PM »

You might want to check the fittings you brazed when you put on the compressor and filter drier. One of the fittings might be restricted which can be causing the compressor to slow down, shut off and try again.

houptee · « **Reply #2 on:** August 11, 2019, 08:29:08 PM »

Is it the newest LG compressor version did it have a red sticker on the top?
If so you need to do a software update to the main board with the special black box programmer it looks like a jump drive.

New version LG Compressor part # TCA38091801 & Software Jig TCA35911910
Compressor has a purple decal and red decal on top warning about the software update.

FLS075LANA is the new compressor model number
It replaces these older LG/Kenmore Elite compressor versions:
FC75LBNA
FLA075LANA
FLB075LANA
FLB075LBNA

tcarmen · « **Reply #3 on:** August 11, 2019, 08:51:39 PM »

Is the programmer a part, or something you would need to be LG auth warranty in order to get?

houptee · « **Reply #4 on:** August 12, 2019, 12:13:26 AM »

Its a part you can order software tool separately as TCA35911910 or apparently sometimes it comes in the box with the new compressor.

Here is a service bulletin about how to do it.

tcarmen · « **Reply #5 on:** August 12, 2019, 06:59:47 AM »

Thanks!

PS the TCA35911910 number shows up as a "COMPRESSOR,SET ASSEMBLY" when I looked it up @ Marcone.

Is that the programmer or a whole compressor kit?

houptee · « **Reply #6 on:** August 12, 2019, 09:17:01 AM »

I think the part # TCA38091801 comes with the Compressor and software jig as a kit.

You can get the software jig separately as part number CJT30000002

NOTE:When servicing an LG fridge that will have the compressor replaced with their new Universal Compressor (TCA38091801), control boards manufactured prior to 2014 WILL NOT WORK with the update jig. This means that any fridge made 2013 and prior must have the control board replaced AND reprogrammed with the jig before running the compressor. Failure to do this will result in a dead compressor which must be replaced again.

Zoren · « **Reply #7 on:** November 14, 2019, 07:17:41 PM »

Hello,
I have Kenmore Elite 795.72053.113 with FC75LBNA Compressor and EBR73093613 PCB, manufectured 2011
Compressor is broken and i bought FLS075LANA compressor to replace old one.
I'm loooking a PCB for my new compessor.
For my new compressor to update software on it, I need PCB that is made after 2015.
I've tried to buy a new PCB from "Encompass" and "Siers", but they all manufactured before 2015.

If you know anything where i can buy that PCB please help. Thank you.

houptee · « **Reply #8 on:** November 14, 2019, 11:45:07 PM »

From what I heard LG has stopped selling the new universal compressor and the software jig to the general public. Only authorized LG technicians can order them. They extended the warranty for parts and labor to 5 years and compressor is still 10 years total but owner pays labor after the first 5 years from date of purchase. So I don't know if you can find the main board anymore from online part sites. Try the link on this page at the top for appliancepartspros.com maybe they can get it.

houptee · « **Reply #9 on:** November 15, 2019, 09:37:19 AM »

The instruction sheet for the software update tool says if you have trouble updating call LG technical support 800-847-7597

re5513 · « **Reply #10 on:** September 14, 2020, 01:31:39 PM »

Quote from: houptee on August 12, 2019, 09:17:01 AM

NOTE:When servicing an LG fridge that will have the compressor replaced with their new Universal Compressor (TCA38091801), control boards manufactured prior to 2014 WILL NOT WORK with the update jig. This means that any fridge made 2013 and prior must have the control board replaced AND reprogrammed with the jig before running the compressor. Failure to do this will result in a dead compressor which must be replaced again.

Apologies for bringing up this older post; however, I have a customer with a # LG Refrigerator who needs the new universal compressor and (based on this) also is in need of an updated control board. My question is, do all the control boards need to be replaced or just the main control board (EBR73304210) and then flashed? I'm hoping it is just the main control board.

Cheers,
RE5513

houptee · « **Reply #11 on:** September 19, 2020, 11:50:14 AM »

Read this thread has the mainboard bulletin info.
https://www.appliancejunk.com/forums/index.php?topic=29128.msg124594#msg124594

re5513 · « **Reply #12 on:** September 21, 2020, 03:55:47 PM »

Thanks for the timely reply, that is helpful.

Looking at this particular unit, I realized that the PCB P/N I cited was not correct.

The actual PCB has the P/N EBR65002702. I understand from my parts guide, that this was updated to the replacement part EBR65002703. The page you cited from Service bulletin CNZ201900235-04 only covers EBR7xxx...xx PCBs.

I observed that the FW test port on the EBR65002703 (& the EBER 65002702 as well) has a different pinout than configured in the standard CJT30000002 Firmware update tool. It appears the VCC, Ground, RX and TX ports are there, but they are not in the right order. I'm wondering if I can simply rewire the one of the connectors to match the pinout of the EBR65002703 PCB and whether the update tool will be able to update it. If not, then I'm not sure what the repair strategy will be other than finding an old, new stock OEM compressor that matches the original one. Given that the original fridge was manufactured in 2010, that might prove challenging.

Thus, my first question is can the EBR65002703 board be updated to work with the LG universal compressor? If so, what manufacturing date of the board can be used to do the update?

The second question is if the EBR65002703 board can't be updated to work with the universal compressor, what would be the next best compressor replacement steps or strategy?

Cheers,
RE5513

houptee · « **Reply #13 on:** September 23, 2020, 11:44:56 AM »

I think you have a compressor ends in LANE which is different than the Universal compressors that are LANA.

The last letter E cannot be substituted with a A its different inverter control system.

re5513 · « **Reply #14 on:** September 23, 2020, 11:49:40 AM »

>I think you have a compressor ends in LANE

That is correct. The original compressor is the FC75LANE. Thanks for clarifying that it uses a different inverter system compared to the FC75LANA.

re5513 · « **Reply #15 on:** September 23, 2020, 01:02:17 PM »

The LG part number for the FC75LANA compressor is TCA36411702 and this appears to still be available.

houptee · « **Reply #16 on:** September 23, 2020, 07:01:36 PM »

Did you look up the current part number to replace the LANE compressor?
They cannot be interchanged with anything other than that type compressor.
Usually the inverter control is in a box next to the compressor on the LANE systems.

re5513 · « **Reply #17 on:** September 23, 2020, 07:20:11 PM »

Yes. I typed my last reply too fast. It should have read, "The LG part number for the FC75LANE compressor is TCA36411702". The use of a different inverter system with the FC75LANE compressor is a big help. Thanks.

houptee · « **Reply #18 on:** September 23, 2020, 07:20:51 PM »

And are you sure the compressor is bad?
The LANE compressors can be tested with a power cord if you are very careful not to short anything.
You take a old computer power cord and put 3 insulated alligator clips on the end.
Clip to the 2 pins on the compressor (only 2 pins are used on linear compressors the 3rd pin does nothing) and clip the ground to the compressor frame.
Plug in to 120v outlet and compressor should run. If it does run then the inverter board is most likely bad, they revised the inverter boards once or maybe twice.

re5513 · « **Reply #19 on:** September 24, 2020, 02:51:33 PM »

The main PCB on this unit has a "test mode" that forces the compressor to run, according to the unit service manual.

In test mode 1, it measures >200V at the compressor which would appear to indicate that the compressor is good. Whether or not the Inverter is good depends on what kind of signal the inverter is designed to output. So, while the AC RMS voltage measurement is in the proper range. The waveform and frequency (1.16KHz) is curious in that occasionally it shows a negative DC offset (which I would not expect). See the photo below.

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Author Topic: Need help with a LG LinearCompressor (Read 6234 times)