I have reassembled it twice and that gets the pump working again temporarily. Here’s a pic of the led indicators in its current state.
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According to my manual that is excessive temperature. As it explains:
The maximum operating temperature of the electronics has been exceeded. (Only occurs in case of an improper use of the pump in liquids with more than 35 degrees C)
The probable cause is the bearing at the bottom of the impeller is damaged, I had this happen on my home tank after the pump took in some sand. I have also seen a couple cases where the pump was damaged in shipping so the cage that supports the bearing cracked and it is lower in position as a result and the bearing is damaged but the motor would need to be replaced if this is the case. Shoot me an email. Tunze at sbcglobal dot net