Beeping is alarm usually meaning the temp is getting warmer or colder than setting and lo is an error code ---as per their manual Has the appliance door been open for longer than 60 seconds? If not, then the temperature has risen higher or fallen lower than the temperature that has been set. This could be due to: The appliance door being opened too often. The ventilation opening being covered or dirty. A lengthy interruption to the power. A large amount of bottles was added to the unit. The display temperature is out of range. check your temp and unit ---do an online search for manual can download their owners and repair manual free very detailed