Labconco Protector 3930000 User Manual page 72

Chapter 8: Troubleshooting
PROBLEM
Airflow Monitor
Malfunction
(Continued)
68
CAUSE
Continuous alarm.
Monitor alarms; air
way to airflow
monitor sensor is
blocked by insects,
dust or debris.
Audible disable will
not stay operational.
CORRECTIVE ACTION
Check the face velocity of the
enclosure as the airflow of the system
may have changed. If incorrect, adjust
the speed control to increase face
velocity. The HEPA filter on the
accessory FilterMate may have
become loaded. If face velocity is
correct, calibrate the airflow monitor
outlined in this manual in Chapter 6.
Lightly clean the airway with clean air.
Be careful not to touch sensitive
electrical components.
An alarm condition must be
continuously present before the audible
alarm can be silenced. If flow
conditions fluctuate near the alarm set
point, the airflow monitor will
automatically reset it. Action should be
taken to bring the enclosure airflow into
proper operating parameters or adjust
the alarm set point lower.
Product Service 1-800-522-7658