Water backs up into the deodorant tank, causing it to overflow. Note that normal operation is only 8 - 15 seconds per flush. The permanent magnet models of the centrifugal discharge series are quieter than previous units that utilize wound field motors. Also both the intake and the discharge pump were upgraded to operate at a lower sound level while improving the performance and using less power. The standard bowl and seat may be upgraded to the Hi-boy size, contact Raritan Technical Support for details.
Bowls are interchangeable.
Crown Head suddenly will not pump out solids or paper. In units manufactured after late 1985, problem is usually CH120 discharge pump wall. Replacing it should restore the head to proper operation. If batteries aren't in excellent condition, or if corrosion exists at wire joints and terminals - voltage drop may cause head to run slow and not discharge properly. Also, CH119D1 discharge impeller may require replacement.