I am getting an E6 error on my Trane Split System Unit (R-410A), does anyone know what this problem could be?

An E6 error code is a communication error that the inside unit is not able to communicate with the outside unit. This includes the high voltage and low voltage lines. What Causes an E6 Code on a Mini Split? Wiring. Open or Bad communication wires.
https://www.hvachowto.com/how-to-troubleshoot-and-fix-a-mini-split-e6-error-code/

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DeLonghi CF210 Portable Air Conditioner Error code e6 ...

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DeLonghi CF210 Portable Air Conditioner, error code e6 related issues. Get free help, solutions & advice from top DeLonghi experts.

Error e6 displaying on single split model one - Fixya

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Apr 5, 2010 - Question about DeLonghi CF210 Portable Air Conditioner ... then the code error display E6 and the error code is Communication malfunction.

DeLonghi fix e6 error Air Conditioners Questions & Answers ...

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DeLonghi air conditioners fix e6 error related questions and answers. ... DelonghiFX400eco error code I Have the above air con unit 18 months old the cooling ...

DeLonghi CF210 Portable Air Conditioner Error code e6 split

when was the last time this unit was cleaned

Fault code. 6. From what I have read 1 of 2 items. The unit has completely lost freon charge. Or 2, outdoor has overheating problem, ie. condenser fan motor not running

My a/c complain

The old 410A fittings are different than the r-22 fittings. There are adapters available on ebay. Remember 410A runs at higher pressures than 22. Be sure to use gauges for 410A! Use the right gauges with the right hoses! High pressure.. Use the right gauges and the right hoses!

The E - 4 error code means the system is low on refrigerant type: (R-410A)

It may be a 410a unit. regular R22, R134 gauges will not work. You will need 410a gauges as it has much higher pressure in the system.

thanks for your question, you will need a set of gauges on the unit to determine if the unit came precharged, if it didn't then you will need to vacuum down the unit, at least three times, after each time release a little 410a into the system them evacuate again, 410a is bad for drawing moisture, did you put an in-line filter dryer on as well ? after you find out about the freon level, then look at the name plate rating for amount of 410a needed, before adding the freon, use nitrogen to leak check the system, then weigh in the proper amount of 410a, unit should run really well after that, hope that helped, thanks again for your question, please feel free to come back if you have any more questions, thanks, mr.grzz