Dryflo, MMA and MMB
12
Problem
Probable Cause
Remedy
Insufficient airflow
Fan rotation backwards
Proper fan rotation is clockwise when viewed from the
motor side or counterclockwise when viewed through the
inlet cone. See Start-Up/Commissioning Collector.
Access doors open or not closed
tight
Check that all access doors are in place and secured.
Fan exhaust area restricted
Check fan exhaust area for obstructions. Remove material
or debris.
First-stage filter plugged
Remove and clean or replace.
Second-stage filter wrap plugged
Remove and replace. Use only genuine Donaldson
replacement parts. See Second-Stage Filter Wrap
Replacement.
Filters need replacement
Remove and replace. Use only genuine Donaldson
replacement parts. See Third-Stage Filter Cartridge
Replacement.
Plugged HEPA filter
Remove and replace. See Optional Fourth-Stage HEPA
Filter.
Liquid leaking out
bottom of door
Door does not fit tight
Increase door gasket compression by removing door and
lifting off the hinges. Loosen the top door latch nut. Turn
lower latch nut, located under the larch arm approximately
three rotations clockwise.Tighten top door latch nut and
replace door. Check seal and repeat if necessary.