Shield 1500 Owner’s Manual
DOCXXX Rev 1
©Puralytics 2017
Page 19
Chapter 5: Cooling Fan Maintenance
Introduction
A cooling fan is provided on the underside of the unit to maintain optimal power supply
to the LEDs by the LED power supplies. The fan operates whenever the unit power is
on providing an auditory reminder that the unit (and UVC lamp) is powered. Air is pulled
from the back/below, is blown over the power supplies and exits through a grid of holes
on the bottom-center as well as slots on either side of the bottom.
Inspection
Always listen for the fan. Any changes of pitch could indicate obstruction of the fan inlet
grille. Quarterly, access the bottom of the unit (if situated on a counter, just tip the unit
backward slightly) and look for any lint or other obstruction of the fan inlet grille.
Maintenance
Anytime that there is material on the fan grille, remove it with a brush and/or
compressed air.
