Honeywell F50E - Manual (Page 15)

STEP 5
Turn on the air cleaner. If the cell(s) and prefilter(s) are wet, the neon
light may not come on and you may hear arcing. If the arcing is annoy-
ing, simply turn off the air cleaner for 2 to 3 hours or until the cell(s) are
dry.
If your air cleaner has a Solid State Performance Indicator, the CHECK
LED may come on if you install wet cell(s) and prefilter(s). Again, if the
neon light or the CHECK LED annoys you, simply turn off the air cleaner
for 2 to 3 hours or until the cell(s) and prefilter(s) are dry.
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