Troubleshooting Guide; Clean Air Delivery Rate - Guardian AC4900 Use & Care Instructions Manual

NOTE: Do NOT stick any foreign objects or your fingers inside of the unit.
CAUTION: Do NOT use gasoline, benzine, thinner, harsh cleaners, etc. on and/or in the unit
while cleaning as they will damage the product.
NEVER use alcohol or other solvents.

TROUBLESHOOTING GUIDE

PROBLEM SOLUTION
Unit does not operate. Check that the unit is plugged in.
Check that filter is in place.
Confirm that filter is Genuine Replacement Filter
Call Customer Service.
Unit shuts off unexpectedly. Check that unit is plugged into a working electrical outlet.
Check that filter is firmly in place.
Check that the Rear Cover is latched firmly in place.
Call Customer Service.
No air circulating from unit. Unplug unit. Check Pre-/Carbon and filters.
Clean Pre-/Carbon Filter if necessary.
Replace filter if necessary.
Increase in noise level. Make sure the filters are clean. Replace if necessary.
Red light is flashing. Replace filter and reset system.
Blue UV-C light is flashing. Replace bulb and reset system.
What is CADR?
CADR stands for "Clean Air Delivery Rate," which indicates the volume of filtered air delivered by
an air purifier. CADR ratings show the effectiveness of how efficient the air purifier is at capturing
fine particles from things like tobacco smoke and plant pollens from the room.

Clean Air Delivery Rate

From air cleaner to air cleaner, compare the CADR numbers. First look at suggested room size. Then refer
to the Clean Air Delivery Rate (CADR) numbers. The higher the number, the faster the unit filters the air.
Refer to website for individual model CADR numbers.
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