Mitsubishi Electric is a Japanese manufacturer of household appliances and home electronics. The company was founded in 1870 and it is based in Tokyo, Japan. Mitsubishi Electric manufactures products for the residential market and it also offers commercial products such as water treatment systems, lighting systems, home theater systems, heat pumps, and security systems.
On this page, you will find more information about the most common causes and most relevant solutions for the AC error 'U2'. Do you need help straight away? Visit our support page.
The Mitsubishi documentation indicates that error code 'U2' is caused by the following problem: "Abnormal high discharging temperature/49C worked/insufficient refrigerant".
Do you think there is another cause for this error? Let others know in the comments.
We've created a list of solutions which you can follow if you want to solve this AC problem yourself. Do you need more help? Visit our support page if you need professional support with AC right away.
If you are having issues with your Mitsubishi Electric product or if you encounter errors while using your home appliances, then you might encounter the error code Mitsubishi U2 (AC) on your device’s screen. This error can occur when there is an issue with your device or it can occur when there is an issue with your power supply.
Sometimes, common device errors or server problems can also cause this error.
To fix this error, you need to try a few solutions.
Option 1: Replace the compressor
The best way to start this process is by removing the protective caps on both sides of your compressor and checking if there are any visible signs of damage or leakages.
If you see any sign of damage or leakages, then it’s time to replace your old compressor with a new one.
When you are done removing the old compressor, install the new one. To do this, you need to use the screws that came with your new compressor. Then attach it in place of the old one. Once this is done, plug in your air conditioner and test it for an hour.
If your air conditioner works fine after this period, the compressor causes that problem.
Option 2: Check the indoor/outdoor connecting wire
The next thing you need to check is if there is a problem with your outdoor unit’s wiring. You can test this by unplugging your outdoor unit from its power source and by checking if there are any visible signs of damage or leakages on it.
If there are no visible signs of damage or leakages on your outdoor unit’s wiring, then you can proceed to the next step.
Option 3: Clean the air filter
The next thing you need to do is clean the air filter inside your air conditioner’s unit. To do this, you need to remove the screws that hold down your old air conditioner’s filter so that you can detach it from its base plate.
Now, use a vacuum cleaner to clean the dust particles from your air filter so that it can be used properly again. After cleaning it, reinstall the old filter back in place and plug in your air conditioner and test it.