Lg Air con

[dibbo]

Hi Guy's

can any one help me with this problem.. I went to a LG ltd3681rj 10kw cassette system and found the condenser fan not working and the compressor not running but the compressor case was red hot. I was there for over 1 hour doing checks, the comp did not restart, not sure if it is the fan pcb faulty or the compressor, any help would be great

thanks

[Brian_UK]

It's a bit tricky to answer that one...

What sort of checks did you perform without the compressor running?

Initial thoughts are a gas leak or, as you say, a faulty condenser fan.

We need more information.

[paul_h]

I'd be checking the comp windings for open circuit, cooling the compressor down with wet rags until it stopped showing open circuit if it was. Checking supply voltages, contactors/relays, soft starters if fitted, and capacitors.
Reseting the power just to see the compressor run successfully. You need to see if the problem is the compressor, the supply, the condenser fan, or something else.

[dibbo]

thanks for the reply, I checked the windings with my multi meter, power to the compressor,they were ok, put my guages on, Dirty oil and a slight burnt smell, that why i suspected the compressor,the comp has an internal klixon cut out the case was very very hot, a wet rag would not i feel bring the temp down, Suction pressure was off the scale's, this is an old unit 4/5 years old running on R407..gonna change fan pcb first, anyone got tel no of supplyers of lg PCB's

[frank]

the case was very very hot, a wet rag would not i feel bring the temp down,

?????? Great statement!!!!!

[dibbo]

?????? Great statement!!!!!

Hi Frank

this statment about the wet rag was made to me by a 20 year old veteran ac guy. it is not the sought of thing i would do myself, electrical saftey etc etc.

the same guy told me he has throne a bucket of water at the condenser to remove dust etc.

As for your comments (great statement) i find it insulting and a very poor and flipent comment to make when a member is looking for some help. I am a fully qualified AC / Refrigeration enginer Been through a full aprentiship ( not a 7 day course like some )

DIBBO

[thebigcheese]

were abouts in ni chris?

[airefresco]

Does anybody know what a CH32 fault code is on a LG Multi-split MC07AHM (AMNH076D2M0) is? Went to a site today from a couple who have bought a new house with the aboved mentioned unit installed (there´s actually 5 installed). They only just moved in the 2 units upstairs (one multi system) had no gas in and two downstairs (the other multi) shows CH32 on both indoors. Don´t know who installed them, but they didn´t leave any manuals just the controllers. I´m going back there in the morning to find the leak on the upstairs units, but it would be nice to repair the the downstairs too, while i´m there.

EDIT: already tried mylg.co.uk

cheers
paul..

[sinewave]

All this aside if you take a look at the viewings of this thread (17,300 and sumat) tells you, 'there is a problem Houston!'

[airefresco]

Doesn´t matter, i´ve found it - CH32 Inverter Compressor Discharge Temperature Too High.

[eggs]

Doesn´t matter, i´ve found it - CH32 Inverter Compressor Discharge Temperature Too High.

That's another one with a gas leak then! Happy hunting.

Eggs

[airefresco]

Yeah, looks that way. To be honest it´s not a brilliant install. Apparently it was only put in 6 months ago, but the outdoors look like they are 5 or 6 years old, the grilles on the fans are completely rusted and there´s several other spots of rust on the feet and outdoor casing. Is this normal for LG units? All the pipework was put in when they were building the house, so I don´t hold out much hope of gaining easy access to it. I´m praying the leak(s) are on the outdoor flares, but we all know they´re not going to be.

[nike123]

Yeah, looks that way. To be honest it´s not a brilliant install. Apparently it was only put in 6 months ago, but the outdoors look like they are 5 or 6 years old, the grilles on the fans are completely rusted and there´s several other spots of rust on the feet and outdoor casing. Is this normal for LG units? All the pipework was put in when they were building the house, so I don´t hold out much hope of gaining easy access to it. I´m praying the leak(s) are on the outdoor flares, but we all know they´re not going to be.

From my experience in cases like this, I would check flared pipe surface for scratches. If found on more than one flared surface, you have to cut all flared pipe ends and make new, proper one, because person who did flaring have bad tool or flaring practice. Than make pressure (leak) test with nitrogen for 24 hours.

[Alex Harvey]

I have known a hair line crack on the flare. The leak was so small and would take a couple of weeks to loose enough of the charge to effect the duty. The cracked flare could not be seen with the naked eye or detected with leak detector.

Needless to say this was only found after a number of call backs.

Not on a LG unit and was some number of year ago.

[MRTENNENTS]

Cuppa? Hell you can imagine the factory workers at lg with their feet up proclaiming "lifes good!"

[MRTENNENTS]

Aye....ch32 is channel 32......coz the confused unit thinks its a telly!

[paul_h]

I have known a hair line crack on the flare. The leak was so small and would take a couple of weeks to loose enough of the charge to effect the duty. The cracked flare could not be seen with the naked eye or detected with leak detector.

Needless to say this was only found after a number of call backs.

Not on a LG unit and was some number of year ago.

I've seen a couple of cracked flares, normally they are obvious and get bigger cracks when you tighten them. Interesting to hear of one that exists but never gets visible.
But it's not likely in this case with three units having low refrig charge, I'd oput my money on bad flares.
edit:

Cuppa? Hell you can imagine the factory workers at lg with their feet up proclaiming "lifes good!"

Aye....ch32 is channel 32......coz the confused unit thinks its a telly!

WTH?

[airefresco]

Well you were all kinda right. The first unit had a bad 1/4 flare on the indoor. The edge was a little cracked, only a really small crack but the leak detector found it. The other one was the 3/8 flare wasn´t tight enough. While I was there I also found that there is no earth to the outdoor units. I kept getting a belt off the bracket. Only a little bit, but it was enough to make me check the connections.

[briza83]

---------------------


Mod's Comment:


This is an engineer's forum - not a bog wall. We've heard all that nonsense before.

[momo]

Yeah, looks that way. To be honest it´s not a brilliant install. Apparently it was only put in 6 months ago, but the outdoors look like they are 5 or 6 years old, the grilles on the fans are completely rusted and there´s several other spots of rust on the feet and outdoor casing. Is this normal for LG units? All the pipework was put in when they were building the house, so I don´t hold out much hope of gaining easy access to it. I´m praying the leak(s) are on the outdoor flares, but we all know they´re not going to be.

How near are the units to the coast? You mention the casing, what about the electronics? It seems like measuring the thickness of paint ;-) and rust is a good measure of the quality of A/Cs nowadays LOL.

[airefresco]

Everything is close to the coast here, it´s not that big of a place,

To be honest I don´t really remember this job too well, it´s been a while.

[Alex Harvey]

By the coast or not the units should not rust after six months. This indicates the metal were not de-greased before painting. You should take this up with LG as there is a 3 year warranty.

[naan72]

We used to put in 100k a years worth of LG splits and multi splits. We had loads of 'warrenty' issues! We even had lg's own engineers out to one job which didnt work if you wired the control as they instructed but did the 'incorrect' way we did. They walked away completley baffled.
It worked out in the end that it cost us 5k in one year drivin round the country putting brand new kit right. After 2 years they agreed to pay us the money and we started installing Mitsi'.

[airefresco]

By the coast or not the units should not rust after six months. This indicates the metal were not de-greased before painting. You should take this up with LG as there is a 3 year warranty.

I completely agree with you. Most of that cheapo chinese stuff you see around lasts a good couple of years before it starts to rust. In LG´s defence the climate out here is extreme. The older style Samsung units tend to last about 18 months - 2 years before they go rusty and that´s about average for most makes I have seen. The only units I have seen out here that seem to last a reasonable long time without rusting is Daikin and Panasonic. Maybe they use a different type of paint or something?

I never did follow up on this, for two reasons.

A) I didn´t do the install, and never got paid from the builder for doing the repairs, so i´m not really that bothered.

B) They would only give (I imagine) a 2 year warranty here. And even then, it´s not worth the hassle most of the time to get stuff done under warranty. That applies for everything, not just air conditioning.

[rayn]

I thought the first reply to Chris would have been - "Oh no! not another LG question?!?!"

dude i need 2 know how the f did u write upside down?????????

[rayn]

another thing.... yup u guessed it an lg split.... packed its bags n split, this time not lgs fault.... i dont think, had a storm last night thing turned off wont turn back on can any1 help? any suggestions would b gr8ly appreciated.

[rayn]

so really they called themselves that coz u should thank ur lucky goldstars it still works then they changed to if it still works lifes good???

[Brian_UK]

dude i need 2 know how the f did u write upside down?????????

It's the wonder of Google....

http://www.sherv.net/flip.html

[Imp]

I thought LG was supposed to be improving. Looks like the CH33 nightmare has returned. Their prices are not what they were. You can get better kit for similar pricing.
Cheapest wall mounts on the market are not LG.
Remember also that LG manufacture specifically for DOMESTIC use. Their commercial units are fraught with problems.
I'm not sure if this still applies but their commerical units never used to heat until the return air temp was 14°C. Now wheres the point of that when you want the heating to come on before you get to work?

[dangcornish]

Lg art cool gallery lasted 10 days before the pot went , to my joy mannaged to blag a new condening unit from wholesaler.(result) Only to install and the old girl comes up with a fault, flashing lights whats all this i ask? take a look at LG support page it STATES INDOOR UNIT AIR ON THERMISTOR FAULT, SCROLL DOWN TO VIEW A MORE DETAILED DESCRIPTION OF THIS FAULT..........SCROLLS DOWN TO READ OUTDOOR THERMISTOR ERROR.........ABSOLUTE CLASSIC!!

[stevewood]

I thought LG was supposed to be improving. Looks like the CH33 nightmare has returned. Their prices are not what they were. You can get better kit for similar pricing.
Cheapest wall mounts on the market are not LG.
Remember also that LG manufacture specifically for DOMESTIC use. Their commercial units are fraught with problems.
I'm not sure if this still applies but their commerical units never used to heat until the return air temp was 14°C. Now wheres the point of that when you want the heating to come on before you get to work?

Certainly still seems to be the same, we've had a number of complaints here that their heat pump systems weren't working with an ambient of <14degC!!

[riojaonly]

Here we are mid 2011....any improvement in LG?

I'm an end user looking at an LG vrf (multi-v) for residence in South Florida. From an uneducated consumer's standpoint (me), LG has some of the slickest looking indoor units (art cool) and best pricing. But if they're still crap on the inside, I need to move on.

Anyone have anything good to say about LG?

[Brian_UK]

Here we are mid 2011....any improvement in LG?

I'm an end user looking at an LG vrf (multi-v) for residence in South Florida. From an uneducated consumer's standpoint (me), LG has some of the slickest looking indoor units (art cool) and best pricing. But if they're still crap on the inside, I need to move on.

Anyone have anything good to say about LG?

Have a look at this recent tead on the subject...
http://www.refrigeration-engineer.co...-they-reliable

[Alex Harvey]

This thread has been going for a long time and LG should have improved. They have been less aggressive in going for market share in the UK in the last few years and the equipment maybe applied better.

The Artcool units are for the domestic home user and sell on looks rather than pratical function. LG are relative new comers to the VRF market and I would ask for reference to customer with equipment installed locally if I was you.

Here we are mid 2011....any improvement in LG?

I'm an end user looking at an LG vrf (multi-v) for residence in South Florida. From an uneducated consumer's standpoint (me), LG has some of the slickest looking indoor units (art cool) and best pricing. But if they're still crap on the inside, I need to move on.

Anyone have anything good to say about LG?

[charlie patt]

leave it alone still have probe faults/ thats my opinion have left alone for 3 years and did have a good wholesaler they convinced me to try another unit the new vr with 12 indoors all came packed up well so just before the install i took of inspection panel to view the quality of kit as i got feed up with call backs to my horror what a mess the quality of clamps and braize was poor, did not bother fitting it ordered a mhi the best bit was there was hardly any diff in money the only reason i tried again was the fact the wholesalers are very good and i told them to call me when they dropped lg

[Alex Harvey]

Well 'Charlie Patt' said it all. The Japaness manufactures still have the best quality, even MHI which is at the cheaper end of the market.