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I have a Lg Multi v heat pump. we had a freon leak, evacuated system and recharged but now can't get any heat or cool out of it. It runs continuously and shows no codes. pipe is really hot ne

I have a Lg Multi v heat pump. we had a freon leak, evacuated system and recharged but now can't get any heat or cool out of it. It runs continuously and shows no codes. pipe is really hot next to inside coil up to EEV. 12 indoor units are connected to the outdoor unit and all are doing the same thing. This unit was functioning before the leak but would sometimes show code 32. any suggestions what to try next? The Hvac company may have put sealant in the unit

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I'm a retired and certified HVAC&R Technician. You only indicate that you "evacuated the system and recharged it." If that is all you did, then you have problems. Where was the Freon leak? What was done to repair the Freon leak? When you evacuated the system, did you then pull it down to 28 inches of vacuum? If so, did you ensure it held 28 inches of vacuum for a minimum of 30 minutes? Then, did you charge the system with 250 psi of Nitrogen and ensure it held for 30 minutes? If so, did you then release the Nitrogen and pull another 28 inches of vacuum prior to filling the system with Freon? These are the steps I used EACH AND EVERY TIME I EVACUATED A SYSTEM; and I only had a problem ONCE where the copper tubing got extremely HOT and the system would not HEAT or COOL. Found out the reversing valve was stuck half way. Had to replace the reversing valve. Good luck.

Posted on Nov 22, 2014

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Posted on Jan 02, 2017

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SOURCE: MY HEAT PUMP SYSTEM WILL NOT WORK IN EMERGENCY MODE

the thermostat sub base has a place to connect a wire usually white to energize the heat strips when you push the stat way hotter than the house temp. that is why the strips come on in normal heat. it also has a terminal that is only energized in emergency heat and it also should have a wire connected to it so that terminal can supply power to the strips when the stat is switched into emerg heat . you can identify the terminal from the wiring diagram and if need be jumper w2 wire over to the aux terminal and it will work. they both go back into the airhandler and power the same strips. w2..................................................................................................w2 in airhandler to strips or w2...jumper to aux......................................................................................................................w2 in airhandler to strips.

Posted on Nov 10, 2008

  • 14 Answers

SOURCE: System will not start up.

This is a signal fault between the indoor and outdoor first make sure the dip switches are set start with the unit closest to the condensor set as unit 1 then next unit as 2 and so on the dip switches are inside the indoor unit on the pc board if you check the manual it will tell you which swithes to set, if this wasnt done when the units where installed they would have never worked i would also check the signal wiring between the wallmount and the splitter box / bc box and make sure there isnt a loose connection when you have ruled this out id say more than likely it is a faulty indoor board on the wallmounted unt

Posted on Apr 08, 2009

greenspan
  • 1734 Answers

SOURCE: LG split (3 indoor) LMU360CE

The LED #2 is only flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on). If you want to change it, note: this is not an easy job to do! You will need to remove the top panel, then remove the control paneland then the front panel to gain access to the thermistor. The part isnot available to the public and requires an authorized service techfrom LG to take care of this problem. You will need a special tool toremove the front door seal spring clamp.
But you can call customer service @ 800 243 000 and see if theycan transfer you over to parts. Just give them the model and serial #and see if they would be willing to sell you the thermistor part. Youwill also need the door seal spring clamp removal tool to make the jobeasier.

Posted on Aug 02, 2009

  • 2 Answers

SOURCE: LG Ductless Mini Split System LAN125hv: Heat pump doesn't run.

CA: Compressor Discharge Sensor Fault

Contact a qualified service technician and have them replace this sensor.

Posted on May 04, 2010

  • 12 Answers

SOURCE: eo error code

You need a professional here. Once this has been repaired, I would suggest running the wiring to the outdoor unit inside some sort of piping to protect it.

Posted on Jul 21, 2010

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If you attempted to add to the system, you most likely
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Unless you have a vacuum pump & can leak test,
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Well, If you want to do the job correctly, you need to properly recover the freon and then evacuate the system before recharging. Failure to do so is ILLEGAL for the recovery part. EPA laws forbid knowingly releasing freon into the atmosphere. There are some hefty fines to pay if the authorities were to find out. Not to mention that I really don't appreciate people who knowingly and willingly pollute the air that I breath. - take that as you will.

For the evacuation part, failure to properly evacuate your system before recharging will leave moisture in the system that can destroy your new compressor. If that happens, you won't be saving any money!The air that is left in the system will take up room in the system that is needed for a proper freon charge and can adversely affect how well your system cools when you are finished.

Here is a possible alternative. Take it to a shop just for recovery and evacuation. The labor charges will not be that much. In fact, some shops will do the recovery for free if you tell them they can just keep any freon that is recovered. You need to do a recovery to remove the freon from the system anyway so nothing blows up in your face when you disconnect system components. Then you can return to the shop after replacing the compressor and drier fo an evacuation. This is a good idea also because the system can be checked for leaks by evacuating and seing if the system holds vacuum. That way you won't be wasting any freon dumping it into a leaking system.
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