My enzymes do not appear to be pumping (the volume in the reservoirs is staying the same). What should I do?

The enzyme tubing may be clogged. Look at the enzyme tubing from the reservoirs to the Enzyme Pinch Valve and beyond to the manifold. If there is any discoloration or gelled material in the tubing, replace the tubing. 

Contact ANKOM Technology at https://www.ankom.com/contact/technical-services or (315) 986-8090 to purchase the Enzyme Tubing Replacement Kit (Part #: TDF67). 

Refer to TDF Service Procedure Tube Replacement Enzymes (TS004) for installation instructions.