The display says "E5" or something close to an "E" and the unit won"t do anything.

hi Randal.
this is all i could find on the internet.
Your dehumidifier has sensors to monitor for various conditions that may prevent the unit from operating in a normal manner
problem,the led display is showing e5, possible cause,over current protection..solution.unplug for 10.minutes then turn on the unit and if the e5 is still showing contact customer services or a dealer.

you could try this link as well to see if its of any help to you.
What does E5 mean on Soleus Air dehumidifier Google Search

freeze sensor out of range defective or not communicating properly

Unplug for 10 minutes e 5 usually indicates low voltage protection

Problem
Overheat of inverter compressor motor

Cause
Shortage of refrigerant amount Leakage of four way valve
Defect of connector contact

google jaguar clarion cd error code e5

Sounds like something is binding. Take a flashlight and look closely and be cautious that you don't damage anything

can you see the pin in the charger socket? these can get bent, other wise looks like your charge socket has come free, from the board

Ok what you need to do is call your local service company and have a technician come out and check your Thermostat, its currently not able to read humidity probably due to a power surge

Error "FL" is coming It is not going by applying suggesstion in your booklet kindly enlighten

press resume botton for ten seconds or more the mp210 will work