Ideally the fuse would protect the unit in certain scenarios. You may wish to check if there are any internal fuses. It is indeed a problem of a sort one could only guess at until properly diagnosed.
Be your unit under warranty or not I would contact Krell for their best direction. They may have approved list of service centers in your area, or suggest a return to them. Good luck.
Be your unit under warranty or not I would contact Krell for their best direction. They may have approved list of service centers in your area, or suggest a return to them. Good luck.