Cleaning And Maintenance; Troubleshooting Guide - Guardian AC4220 Use & Care Instructions Manual

CLEANING & MAINTENANCE
GENERAL CLEANING
Always unplug the unit before cleaning or servicing in any way.
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.
Note: Do NOT stick any foreign objects or your fingers inside the unit.
1. Wipe the surface of the unit with a clean, dry soft cloth as needed.
2. Clean the Combination Filter monthly with the brush of your vacuum cleaner.
a. Remove Combination Filter from unit.
b. Remove the Pre-Filter/Charcoal layer
from the Velcro strips on the HEPA Filter
layer (Figure 2).
c. Clean both layers with the brush attachment
of your vacuum cleaner to remove lint and dust.
d. After cleaning, reattach the filter layers with
the Velcro strips and return filter to unit.
If the HEPA Filter layer turns from white to grey or black, it should be replaced with a new one. If
the HEPA Filter is still white, it does not need to be replaced.
FILTER REPLACEMENT
To maintain the performance of the air cleaner, it is recommended that the filter be replaced
about every 6 months. The replacement requirements will vary depending on usage and
environmental conditions. It's time to replace the filter when
1. Filter Replacement Indicator light on the control panel will illuminate indicating that it is time
to replace your filter (Figure 3).
Filter Replacement
indicator light
Figure 3
OR
2. The HEPA Filter has changed from white to grey or black.
IMPORTANT: Do NOT try to wash and re-use the Combination Filter. Please contact Customer
Service or visit us at www.guardiantechnologies.com to purchase a replacement filter.
1. Remove and replace filter according to "Directions For Use" on page E-6.
2. Reset Filter Replacement Indicator. Insert pen tip into HEPA reset area on control panel next to
UV-C power button to reset the indicator (Figure 4).
HEPA Reset
E-8
Figure 2
Figure 4

TROUBLESHOOTING GUIDE

PROBLEM SOLUTION
Unit does not operate. Check that the unit is plugged in.
Unit shuts off unexpectedly. Check that the unit is plugged into a working
electrical outlet.
Check that the HEPA Filter is firmly in place.
Check that the Front Cover is latched firmly in place.
Call Customer Service.
No air circulating from unit. Unplug unit. Check Pre-Filter/Charcoal and HEPA Filters.
Clean Pre-Filter/Charcoal if necessary.
Replace HEPA Filter if necessary.
Increase in noise level. Make sure the filters are clean. Replace if necessary.
An unpleasant odor is Make sure the filters are clean. Replace if necessary.
emitted from the unit.
E-9