My 4 units midea aircon are all showing P2. But after 10 to 15 mins all automatic turn on back to normal.

Called Flash Codes. First try turning off everything at the breaker for at least 2 hours and preferably overnight. Turn back on and wait 15 minutes for self test to complete.

https://www.orionair.co.uk/PDF/fujitsu-trouble-shooting.pdf

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If your Midea Cube 20-Pint Smart WiFi Dehumidifier is stuck on "Water Level 50%" even though the tank has been emptied multiple times, you can try the following steps to reset it:

1. Unplug the dehumidifier from the power source and let it sit for 10-15 minutes.
2. While the dehumidifier is unplugged, remove the water tank and check for any obstructions in the water tank outlet or on the float switch.
3. Clean the water tank with warm water and mild detergent, then dry it thoroughly before replacing it in the dehumidifier.
4. Plug the dehumidifier back in and turn it on. If the water level indicator still shows 50%, try pressing and holding the "Water Level" button for 3-5 seconds to reset the sensor.
5. If the issue persists, try performing a factory reset on the dehumidifier. To do this, press and hold the "Timer" and "Mode" buttons simultaneously for 3-5 seconds until the display panel shows "F". Then, press the "Power" button to turn the dehumidifier off, unplug it from the power source, and wait for 5-10 minutes before plugging it back in and turning it on.

If none of these steps resolve the issue, it may be necessary to contact Midea customer support for further assistance or to have the unit serviced by a professional.

Turn off the circuit breaker to the Midea A/C unit. I found mine outside. My unit has It's own breaker. It's in a metal case covering. I opened the door to the metal case and inside was a black box with 2 led lights that were not lighted. I pulled the metal pull on the black box and the black box popped out. On the back were 2 fuses that look like batteries. I replaced the black box and heard a beep from the A/C unit indicating power was back on. I used the remote to turn on unit and now it works like a charm!

Display = E2
Malfunction or Protection = Communication error between indoor units and outdoor unit.

This is the meaning of the error code. If you need any more AC Cleaning & Repair help contact the professionals.

Normally in your situation I would call the owner and ask for instructions. You could request the owner to send a technician and get it up as a tenant you cannot be denied use of the aircon if that is part of your lease benefit.
We cannot help you much at fixya.com without knowing the make and model number of the aircon unit. Usually with split systems I could suggest you turn the mains power off at the circuit breaker, wait a few seconds and then turn back on. Then go to the internal unit and with remote control start the unit. See if everything comes back to normal.

It is probably the fan motor or Start capacitor. To test turn it off then on.Before the error comes up flick the fan towards you. If it starts then it is likely the capacitor.

I just got my Focus back from service due to recirc button kept switching off everytime... ASNWER IS: PERFECTLY NORMAL, every new Ford is like that, the recirc button will be switched off automatically according to the following conditions:

1) Press MAX-AC round button, will activate RECIRC button FOREVER!!!! but you will b freezing to death FOREVER too.

2) All other situation, the RECIRC will be switched off automatically after ON for 30 min.

Will of
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1、Check whether the resistance of the sensor is
normal (the resistance is 5Кω in the normal
temperature 25℃), when it is abnormal the sensor
should be replaced.
2、Check whether there is short circuit or open circuit
in the wire of the sensor, and whether the plug is
connected well, whether there is welding off or
rosin joint on the electric control board, if there is
any, it should be repaired.
3、When the 1 and 2 are both normal, then the
components or integrated circuit is damaged, the
electric control board should be replaced.

TAKE THE UNIT OFF OF AUTO-TIMER AND TURN THE POWER OFF
AT THE BREAKER...UNPLUG THE UNIT IF APPLICABLE AND WAIT
3 TO 5 MIN...TURN BREAKER BACK ON AND PLUG IN UNIT IF
APPLICABLE AND RE-PROGRAM. YOU MAY WANT TO WAIT TO SEE IF IT RE-PROGRAMS AUTOMATICALLY... AND RESETS...IF
THIS DOESN'T WORK YOU MAY NEED A NEW BREAKER...CHECK FOR ANY LOOSE CONNECTIONS WHILE POWER IS OFF...

something is wrong with the fan, it may be jammed with a foriegn object or have a malfunction. kids may have stuck things in it.