A few things to make check if the unit is going into P1 often and/or freezing:
-Make sure that the temperature is above 41 degrees
-Make sure that the humidity isn't set too low, recommended humidity is 45~50%
-Make sure that the unit has plenty of space all around to allow for sufficient air circulation
-If the unit is sitting on a concrete floor elevate the unit a few inches off the floor.
-Turn off and unplug the unit for 4-6 hours
When a unit runs and begins to accumulate ice on the front panel and/or above the bucket area the unit is low on refrigerant. It will cycle into P1 more often and sometimes stay in this mode.
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