NuAire LabGard ES NU-543-300S, Operation And Maintenance Manual

Page: 63 / 72

OM0239 Page 63 of 72
April 2021
10.1.4 Maintenance
The output of an ultraviolet light deteriorates with burning age. The useful life of the light is approximately 5000
hours under specific test conditions.
Note: Before testing with lamp off, the light may be cleaned with a lint-free cloth dampened with alcohol
or ammonia and water.
The control system monitors UV light usage hour and when the 5000 hour point is reached. The UV light LED
indicator will blink fast along with the display message “Replace UV light”. To view hours or reset timer, perform
the following:
•
Press and hold ENT key for 3 seconds until the menu appears.
•
Press ↑ or ↓ keys to select UV lamp hours.
•
Press ENT key to highlight hours.
•
Press ↑ or ↓ key simultaneous until hours z ero.
•
Press ENT key to accept cleared hours.
•
Press key to return to run display.

Main Menu
Time Menu
UV Lamp Hours
3356
Temperature 24.0
Blower On/Off Password none