Have been + ING form is the present perfect continuous.

It means an action that has started in the past and continues until the present.

• I’ve been cleaning the house for the past hour.
  (I started cleaning 1 hour ago, and I’m still cleaning now)

Have been + past participle is the present perfect passive.

It means something was done to the subject of the sentence sometime in the past.

• These machines have been cleaned.
  (The sentence doesn’t say who cleaned them, just that they have been cleaned already)