TROUBLESHOOTING GUIDE {CONT'D)
PROBLEM
SOLUTION
ABM-HOOD (Must Be Used With Separately Purchased ABM
Meters)
1. won't provide consistent Hold hood firmly over entire grille area to
readings from same
ensure all airflow is captured
vent
2. Low (Or Regular)
Airflow-Readings seem
inaccurate
Fan or blower motor output varies
Install supplied Low Volume Airflow plate
(see Owner's Manual) for airflow ranging
from 7 to 100 CFM. No plate required for
airflow readings from 35 to 720 CFM
HVAC system or blower motor may be off or
have variable speeds
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