Question about ComfortStar 12,000 BTU Mini Split Indoor Unit - CMI12B

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I change the outdoor and indoor board on my comfort star becose to much voltage was put on it. now the lights come on but not the unit. The power light keeps blinking 15 times to be exact. and the cod

I tried turn the main power on/off. but it didn't change anything. the green light on the outdoor unit keeps blinking. theres no pause at all on it

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When we put on the air conditioner it shows F1 or ERROR on the window. What is the problem?


Hi Charity, F1 is a communication fault, I hope this helps......... CHEERS..
1?Check whether the connection of the outdoor unit and indoor unit is one to one, otherwise connect the L, N and communication line of the indoor unit and outdoor unit one to one.
2?Measure whether the voltage between the zero line and the communication line is 18V-30AC half-wave signal, check whether the communication circuit on the indoor and outdoor electric control board has been damaged, otherwise replace it.
3?Check whether the LED on the outdoor power board has been on, otherwise replace the electric control board.
4?Check whether the unit is abnormal caused by the external interference, if it is, then find the interfering source, and removes it.
http://www.chigo.bg/resources/pdf/Failure-code-manual.pdf

May 10, 2016 | grunaire GSI241HXB / GSU241HXB 24,000 BTU...

1 Answer

LG SPLIT SYSTEM AIR CONDITIONER INDOOR UNIT WILL NOT POWER UP


as described the voltage you are seeing is fake. if there is no led lighting in the indoor unit check the small transformer in the indoor unit you should get 12V DC or 24V DC out from it

Feb 10, 2014 | LG Heating & Cooling

1 Answer

The supply is 220v going to pcb. indoor .the outdoor unit was not working due the power supply..was 110v,, prom the pcb indoor..


I assume you are in Australia? There should be a 240v feed to the indoor unit. Once the indoor unit has been switch on , there shouldbe a 240 v supply to the outdoor unit. The communications wire will fluctuate what voltage is supplied to the outdoor. Unless you are a licenced electrician, I would not suggest you attempt to check these figures as the risk of electrocution is very high. No power to the outdoor unit can be as simple as a failed air / pipe sensor on the indoor unit , or the indoor board itself is faulty. Call up an LG Agent in your area for service and to protect your welfare..

Jul 03, 2011 | LG LS-L1210CL Mini Split Air Conditioner

1 Answer

Hi,My Father's LG split air-conditioner has stopped working(as in totally dead no lights or movement)after checking the out door unit for power which it has I noticed the PCB has a red led flashing 5...


The outdoor unit has to be powered from the indoor unit on which the main processor board is present.Disconnect power and check the main PCB. It is possible that the main unit has shut off as there is connection fault or a fault in the compressor unit. So the outdoor unit power supply from the indoor unit must be checked with a multimeter for voltage on switch on. If not there are errors in the main processor board.

Feb 05, 2011 | LG Heating & Cooling

1 Answer

AC unit Amcoraire AOS241HX @ startup i have power to the L1, L2 power inlet terminals to the outdoor unit but no power to the lines going up to the indoor unit. What can I do to correct problem?


these should be seperate circuits so lets forget the condensing unit for a moment. It should not come on because it gets the control voltage for the contactor from the indoor unit. Check your circuit board for a 3 or 5 amp fuse and make sure it hasnt blown. If it has you will get nothing past the board. If that isnt the case, you will have to start checking for supply voltage from the panel to the disconnect at your furnace, disconnect to board(transformer may also be bad) the blower motor. transformer, and circuit board are the only components indoor that effect the outdoor unit.

Jan 08, 2010 | AmcorAire UCHW-H24AF2 Split System Air...

1 Answer

Unit wont start, flashing lights on indoor unit, fuse may be gone


How old is it? Can you justify spending lots of money on an older system? Sounds like a transformer issue. Sometimes if the low voltage wiring gets shorted outside via dog or weed eater it will short the transformer. But if transformer is on control. Controls are cheap at supply houses maybe not from technicians

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1 Answer

Airforce 12000BTU Air Conditioner wiring problem


The outdoor unit should have 2 small wires connected to the contactor coil. This delivers the 24v "Signal" to energize the coil. The wire from the t'stat for cooling are usually yellow, in almost every case. When you put the t'stat in the cooling mode and set the temp lower than the room temp, the indoor and outdoor unit should come on. Check for voltage on the terminal block for 24 volts accross the yellow and common wire. Common could be ground on some handlers. If you have the 24 volts, then check for 24v on the 2 small wires (usually 18 to 22 gage wire) on the contactor coil. If no voltage, trace the 2 wires back to the indoor unit and see where they go. If they are the ones that are not attached, put one on the yellow wire terminal and the other on the common terminal. This will send power to the indoor unit and then piggyback to the outdoor unit. Do not remove the yellow and common from the terminal block. Don't be too concerned about the colors from the outdoor coil wires. Just make sure they are hooked up right. Good Luck and hope this gets it going.

May 14, 2009 | Heating & Cooling

1 Answer

What causes the pulse control on the ac circuit board to fail?


First check your breakers they are seprerate than the indoor they are in the distibution panel and or next to the out door unit. If still no...then check the control wiring (two or more wires in a cable) going to the outdoor unit the supply the voltage to the contactor which is the swich inside the control panel it can be manually pressed in to checked mechanically with the power off, or electically with the power on. It does have high enough to hurt you, so unless you are comfortable with it you may need a tech.

Mar 07, 2009 | Goodman CLJ30AR32 Air Conditioner

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