Your question needs to be answered in 3 parts:
1) As per the manual for my Danby Dehumidifier (Model DDR657EE), the unit may not turn on immediately when powered On (it may take a several minutes). So, generally, it would be normal in your case.
2) Danby's Consumer Help Line (1-800-263-2629) is always busy. So, I called their General number: 419-425-8627. The receptionist transferred my call to their Service dept. My call was answered in 2 minutes.
The Service Rep. described the following code for my dehumidifier model (DDR657EE):
P1 = Defrosting: the unit will go into Defrost mode periodically to ensure that the parts are working at the right operating temperature. It should be in Defrost (P1) mode for only a brief period of time. If the unit is in Defrost (P1) mode continuously for a couple of hours (or more), then you should call Danby Service for further assistance.
He had no documentation of a P2 code for my model.
He also described other General Codes (applicable to most Dehumidifier/Humidifier models):
E1 = Not enough water
E2 = Not draining
E3 = Water temperature too cool
E4 = Overflow Switch activated
E6 / E7 = Problem with Temperature Sensor
So, generally, if you see P1 periodically (for brief periods), then it would be normal.
3) Since your unit keeps running (continuously) and there is no water in the bucket, then you should call Danby ServiceI for additional assistance - it seems defective for this reason.
I hope that helps.
on May 22, 2009