lg air conditioner CH 04 ERROR


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Old 09-01-18, 12:21 PM
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Smile lg air conditioner CH 04 ERROR

So, I been searching for days. In our apartment we have a wall unit LP123HD3A model (LG). Today the CH 04 code started flashing. I did some research and found this:

http://www.orionair.co.uk/PDF/lg%20m...lt%20codes.pdf

Problem is I cannot locate where the pump is at, and all videos I found, oddly enough, are NOT in english. Anyone here can simplify this, or just shoot me in the right direction (I live on site - and of course it is our AC that goes out LOL)

Cheers Thanks!!
 
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Old 09-01-18, 12:50 PM
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You may not have a pump. Does the unit drain to somewhere lower where you can see it coming out ?
The pump is used when the water needs to be pumped up and away from the unit.

That looks for the most part like a PTAC unit although I see references to a window unit.
Your unit is completely self contained..... correct ?

It looks like this manual is very similar to what you have. Download the manual and check it out.
manualslib/manual/689421/Lg-Lp123cd3a.html#product-LP123HD3A
 
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Old 09-01-18, 02:01 PM
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yes, it goes in a wall under a window. It's pretty dry. Some water but not much (nothing like a car does).

and yes that is the model. :-)
 
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Old 09-01-18, 03:33 PM
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https://www.lg.com/

Interesting, that page says it's on defrost mode - that is, if CH04 = E4?
 
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Old 09-01-18, 06:59 PM
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So, curious, what is so taboo about ch 04, I noticed using different search methods, that error code is hard to find. The only other symptom I could find is that it was clicking to running normally to ch 04 and back for about 30 seconds, then the system just shut down and just flashes ch 04

thanks.. i'll keep looking, if I find someting I'll post it here
 
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Old 09-01-18, 07:23 PM
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From what I've read..... the ch04 is a water level in the drain pan issue,
 
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Old 09-02-18, 05:13 AM
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me too but i took the whole unit it out, it is dry. maybe a few table spoons..which I dried up, I'll dig further.
 
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Old 09-03-18, 01:14 PM
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OK, found this on LG suport. But doesn't make sense, sounds like a simple fix (btw, AC unit is dry as a bone) I reset it, I shut the power off and on, and can do nothing, just flashes CH 04, cannot do anything with the buttons
[small]
Fault Code 04Fault code CH04 indicates that the float switch of the fan coil has risen.On fan coils without a drain pump it indicates that the jumper (blue plug with 30mm of blue wire) in terminalCN FLOAT is missing.If the fan coil is running and the float rises it will take 3 minutes for the fault to show on the controller, this isto give the unit time to pump excess water away. Once the float falls, (or the jumper is put back into the board)it will not be possible to clear the fault for 40 seconds. It is considered good practice to reset the power toclear this fault code
[/small]
 
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Old 09-07-18, 03:49 AM
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Anyone else know where this jumper is at? or just call a tech out?
 
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Old 09-07-18, 07:07 PM
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Sorry..... I went thru every schematic I could find and for some reason there is no place for a float or pump to be plugged in.

CN-float should be a two pin connector.

This link is the actual LG service manual. It shows a pump as connecting to the main board on the yellow ICR connector. It also gives a different description of a CH04 fault.
http://www.lgdfs.ca/en/ptac-resource...35.pdf&id=1665
 

Last edited by PJmax; 09-08-18 at 09:10 PM. Reason: repaired link
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Old 09-08-18, 08:06 AM
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Hi Pj. I appreciate you looking, I have vast internet skills and even I am having difficulties with this one. so again, thank you.

just a note that link is bad.. your missing part of the beginning

was able to decipher the link and found one here
http://www.prattco.com/pdf/Air%20Conditioners/PTAC.pdf
 
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Old 09-08-18, 08:15 AM
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O here is a much better one. I am not good at the HVAC as mentioned before,

on page 55/99 says the error code is Outdoor Coil Thermistor error
Is that fixable by me, or does this require a tech with tools and parts?

http://www.mediafire.com/file/wsd1jh...54711.pdf/file
 
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Old 09-08-18, 08:57 AM
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Ok, getting closer it's basically one of the wires either the one by the evaporator, or the one on the copper tubing. Easy to replace and cheap. I'll keep updating here as I get this figured out (price range: $12 - $18)

The only thing I cannot find is the ohms and if it is a positive or negative coefficient
 
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Old 09-08-18, 09:37 PM
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Repaired service manual link in my previous post.
Here's a parts breakout with parts numbers...... searspartsdirect/lp123hd3a/3204/0904115.html
 
 

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