Question about LG LSC121PMA Split System Air Conditioner

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Model C12AWU air conditioner C5 error is displayed, what are the possible solutions

Where do I look for the problem

Posted by Anonymous on

4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: air conditioner shuts off

C5
Communication Error

• Wrong or missing wiring between indoor and outdoor unit cable

• Defect of communication components in indoor pcb assembly

• Defect of communication components in outdoor pcb assembly

• Defect of power supply components in outdoor pcb assembly

• No ground connection in air conditioner unit

(affected by noise in power source)

Posted on Dec 20, 2010

hvac1960
  • 2133 Answers

SOURCE: we recently had a flood

C5 Indoor malfunction of gas pipe thermistor. Check amps of your unit .If very less than specified, it's gas leak. If only little difference and having freezing blow, it's coil and blower wheel dust blocked. Service the unit completely and run the unit.
If gas leak call repairman to find leak and arrest and then recharge gas.
Hope it's helpful. Thanks,.

Posted on Dec 26, 2010

  • 251 Answers

SOURCE: LG Air conditioner turns off

A few basic principles for air conditioner troubleshooting. For both central home air conditioner or window air conditioner, the first thing to check is whether the unit is getting proper power. If the unit uses 220 volt power be sure that the proper voltage is getting to the unit. Same for 110 volt units. A voltage meter can be used to assure that the voltage is correct.

For window air conditioning units the voltage can also be checked before and after the thermostat. If voltage is being supplied to the thermostat but not from it then the thermostat probably needs replaced. This is a fairly common problem. Another place to check is the fan motor voltage. The fan on window air conditioners runs both the indoor blower and the condenser fan. If that motor fails than the compressor may run for a short time, but will overheat and shut off. Continued operation like this will result in compressor failure. This motor can be economically replaced for larger window air conditioners, but for smaller ones the cost of replacement will be more than a new unit.

Central air conditioners for the home are more complex and there are more things that can go wrong. As with the window air conditioner the thermostat can also be a problem. The central air conditioner thermostat will only have 24 volts going to it. So don't look for high voltage there. Some units the voltage will be coming from the outdoor unit and others the voltage will be supplied by the indoor air handler or furnace. Most home central air conditioning will be supplied by the indoor air handler or the furnace. If the air conditioner is for cooling only the unit will usually have only two wires going to the condenser unit. Make sure that you have 24 volts across those wires.

The next thing to check will be the indoor blower. If your thermostat is calling for cooling then the indoor blower should be running. If there is no air moving across the indoor cooling coil then you will soon have a big block of ice formed on the coil. This can happen for a few reasons. The indoor blower is not working, the air flow is restricted and not allowing air to move across the coil. A clogged air filter would also do this. Or the outdoor condenser unit has lost the charge of refrigerant.

Finally and worst of all is when you have a complete compressor failure. Often when this happens the compressor will "lock up" or not be able to turn when power is supplied to it. Overheating or lack of lubrication are usually the main causes of compressor failure. Overheating can be caused by the outdoor coil around the compressor getting clogged with dirt, leaves, or grass. Loss of the refrigerant charge will also cause the compressor to overheat. It is the cool return gas coming back to the compressor that helps to keep it from overheating.

As you can see there are many things that can go wrong with an air conditioner and I have not come close to exhausting the possibilities here. I have just touched on the most common problems in a very basic way.
There are some basic trouble shooting things that can be done very easily. Most problems are above out of the range of comfort for many homeowners and professional help should be consulted before any attempt is made at repairs. Remember also, that the release of refrigerant gases into the atmosphere is a federal offense in the
US. Proper care must always be taken to minimize the release of any gases. A license is also required to handle refrigerants. Make sure that the professional you call has the proper certifications to handle refrigerants properly.


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http://www.fixya.com/support/r3583697-how_to_keep_house_cool_without_using_air

Posted on Jun 07, 2011

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Error code e6 what does that mean air conditioner will not start


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C5 error code what problem exists?


What is the make / model of your air conditioner. With out that information I can't help you with your ac repair problem. Let me know.

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C05 error indicates no communication between indoor and outdoor units and remote control. Replace the remote batteries with fresh duracells first. If that doesn't fix the problem, verify the indoor and outdoor unit are wired together properly. If still no love, a tech will need to come visit. CALL SANYO TO SCHEDULE A TECH IF NEEDED. Mini-split units are new to the industry, and not all HVAC techs are good at fixing them.

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Turn on LG aircon inside house. Goes for a short time them c5 comes up on screen and the aircon stops. Compressor has been noted to start and stop


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Dec 31, 2010 | LG LSC121PMA Split System Air Conditioner

1 Answer

Our Evaporative A/C stops and we get Error C5 can any body help


Hello
Error c5 is a communication error,between the inside and outside unit.

Check your condensate pump operation,float should move freely and unit should not be full of water.

Another possibility is faulty wiring from your outside unit to the inside.
Try taking all power away from unit for 5 min and then turn on to see if it will reset.
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1 Answer

I have a art col air conditioner and it has come up c5 can you tell me what this means thanks


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Nov 14, 2009 | Heating & Cooling

1 Answer

Air conditioner shuts off


C5
Communication Error

• Wrong or missing wiring between indoor and outdoor unit cable

• Defect of communication components in indoor pcb assembly

• Defect of communication components in outdoor pcb assembly

• Defect of power supply components in outdoor pcb assembly

• No ground connection in air conditioner unit

(affected by noise in power source)

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1 Answer

Error C5 LG Art Cool Split System Air Conditioner


Probably a capacitor in the either the compressor or outdoor fan. Don't know if they are dual capacitor or each has it's own. This is just according to the other posts on this site. I would call in a tech to have a look at it. Should be able to diagnose this in about 10 minutes.

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