NuAire LabGard NU-540-300E, Operation And Maintenance Manual

Page: 54 / 63

OM0280 Page 54 of 63
Rev 3 July/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.
The control system monitors UV light usage hours and when the 5000 hour point is reached. The UV light LED
indicator will blink fast along with the red LED alarm indicating the UV light should be replaced. To reset the timer,
perform the following:
•
Press and hold key the press UV light – UV light – UV light key sequentially and the reset will occur
removing the above alarm condition.
•
It is also possible to approximate the UV light usage by the following:
•
Press and hold key and UV light key together for three seconds. The PresurFlow™ LED’s will then
indicate usage of approximately 450 hours per LED light from left to right.
Indicates approximately 450 hours used
Indicates approximately 900 Hours used
Indicates approximately 3600 hours used
Note: Before testing with lamp off, the light may be cleaned with a lint-free cloth dampened with alcohol
or ammonia and water.
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