Mitsubishi Mr. Slim MXZ30TN Air Conditioner - Answered Questions & Fixed issues

It works for a about a minute and then the light blinking begins and it shuts off? What would be the most likely problem?

Those blink is a code and you can look at the unit wiring diagram section and it would tell you what those code mean

Likely the liner of the duct. Possibly a poor seem that is peeling up, possibly a rodent has gotten inside and chewed up some of the pieces. Either way, yes, more money. Possibly needs a duct cleaning, maybe some new duct, tough one. Best Wishes!! If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Compressor is likely shorted to ground. With a multimeter you could ohm the compressor to verify. With power off remove wires at compressor. Test each leg to ground or metal or a piece of copper. Continuity would confirm a grounded compressor. Warranty, age and cost would determine next step. If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

I had the same problem and I found it was that another unit had the heat running while I was trying to run AC on another (they're both attached to the same condenser) so it could only run heat or AC not both. Turn off the heat!

On the data plate for the outdoor unit it will tell you what type and how much refrigerant you need. If the line set is longer than 25 feet you will likely need a bit more than what it says. A 40 degrees evaporator temperature is ideal, approximately 65 psi for r22 If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Try cleaning it and spray with an antibacterial spray. When the unit is running in cool mode it condensates and creates a moist environment inside the ac perfect for mold growth, some units have a coil dry mode which runs the fan to dry out the system after use.

continuous flash is frost prevention ...clean the filter & switch fan to high

flashes once every 2 sec could be room air sensor contact loose/short...call dealer

flashes 2x every 2 sec is indoor coil sensor contact loose/short...call dealer

flashes 3x / 2sec sensor contact problem, or compressor overload protection trip or gas leak...call dealer

the light blinking is an error code. you can count the number of blinks from a brief pause. it would continue to blink the same number of blinks after a brief pause. count this blinks and you can help the incompetent person that installed your unit to diagnosed the unit from the error codes that you will give him.

if you unplug the unit, it will reset and run again. after a few minutes, the sensor would sense the trouble and turn off the unit and display this code again as a blinking light.

tnx for using fixya.

drcool

The newer air conditioners have a button on the actual plug. It is a reset breaker switch. Try pushing the button on the plug while it is plugged in. (Assuming it has one)

Changing the setting won't affect the way the unit works, only how long it runs for. Rapid switching off and on will kill your compressor in time - check the refrigerant level. Usually short cycling on lp switch.

Mold. Moldy dust. You need to clean your unit.

Is your outside coil dirty wash it this may help. Sounds like your head pressure is getting to high and the compressor is kicking out on thermal overload.

clean the filter first then take a shop vac and suck out your condenstate drain line on the outside. Look at the inside coil to see if its dirty if it is clean it.

If you put you phone on to camera mode. Hold the remote with the top facing the camera into the phone. Press on and off button on remote. If your remote is working. You should see a light come on through your mobile phone screen. If it is not. A new remote is required. I use a universal remote.

Is it on the pcb in the outside unit?

your ac's compraser is getting off due to heat in that area voltage is one of the big issue 2 your thermostat is not working properly of your motor is jammed not rotating properly RPM(running per minute)

Mr. Slim, maybe this will help. It is the service manual. http://iris.nyit.edu/~mbertome/solardecathlon/SDClerical/SD_SPECIFICATIONS/Division%2011%20-%20Equipment/11451_Mr%20Slim%20MSH09%20OLD.pdf

try the link below to shed some light on the problem , if not helpful call a technician in http://www.digelair.net/pdfs/TECHLIT/MITSUBISHI/MrSlim_P-SERIES_Troubleshooting_TIPS.pdf

Check this link