What is the code u3 mean - Mitsubishi Mr. Slim MXZ30TN Air Conditioner

https://mynameisneil.com/blog/fixing-the-u2-and-u3-errors-on-pentax-point-and-shoot-1qzoom-ezy-r/

Hi,

U3 usually refers to the write speed of the SD card that is used by your camera. In this case, please check it's storage to see whether the memory card is full and some of it's memory needs to be transferred to another device in order to free up space on the SD card. Thank you.

http://www.omkarmin.com/pdf/workcentre-pro-423-428-printertec-23924.pdf
U3-3
(4133)
ROS failure
Abnormal power adjustment
value to the laser diode
when the diode is forced to
go on
POWER
OFF/ON

Hello..

UE means Unbalance Error.. Check your machine legs and ground level properly.. And the main think is dont put a single blanket.

The U3 error code could mean a few things. Not sure if you get it in both or just one drawer.

It could mean there is something blocking the drain pump. Lift the filter plate and drain filter. Then remove the rotor by disengaging the collar holding the impeller and rotor assembly. clean the area including the channel between the rotor cavity and the drain sump. Put everything back and test.

If this does not get rid of the U3 then it is possible there is a kink in the drain hose. Pull the drawers out and check behind. If nothing visible then other possibility is the inlet water pressure setting is not correct. If you know how to read the water pressure setting from the display then compare the setting on the two drawers.

Please post a comment to let me know what you find.

Error code U3 could mean the drain pump could be blocked.

Remove the trays and the impeller arm. Empty the water with small container or towel. Open the filter plate and drain filter. Get the motor out and check the cavity for any rubbish. Also use a stiff thin wire to clean the passage between drain filter and motor cavity. The instructions for removing the filter plate and motor assembly are in the user guide.
Good luck

Error code U3 could mean the drain pump is blocked.

Remove the trays and the impeller arm. Empty the water with small container or towel. Open the filter plate and drain filter. Get the motor out and check the cavity for any rubbish. Also use a stiff thin wire to clean the passage between drain filter and motor cavity. The instructions for removing the filter plate and motor assembly are in the user guide.
Good luck

U3 code generally relates to drain pump blocked. This could mean the water is not able to drain out. Leaking of water is not a good sign. Shows the vacuum seal is not working.

Clean the drawer door from inside and make sure the seal lining is sitting properly. Also the filter plate and the motor cavity needs cleaning. You will need to see the user guide on how to do this.

That's a "Low Pressure" fault and it's possible you may only need to reset the mode. This question is posted under DD603 but a U3 code is usually associated with the 602 models. I am including an instruction for you on how to check the setting. Start with that first, it is easy to do.
Let me know if you are not able to read the text.

I have had this problem and went straight to one of the F&P engineers... U3 will display because the water did not drain from the previous stage in the cycle... Check the HP/LP settings first as this will give the impression the water did not drain if incorrectly set. Otherwise the pump may be damaged, blocked or the waste hose blocked. Check these next. I found a little sticker in the waste pipe.
Happy fixing.
Rich