The Descending Light on the Hot Stamping Machine Control box lights when the box is sent a signal to the air valve to make the print head come down.
Then the descending light is on the print head should be going down or down.
This light is used when trouble shooting the Hot Machine.

If the Descending Light is off, the Print Head should be up.
If the Descending Light is on, the Print Head should be down.
If either function does not happen, the Print Head Air Valve may be bad.