Labconco Logic+ 30348 Series - Page 57

7: Troubleshooting
57
PROBLEM
CAUSE
CORRECTIVE ACTION
Airflow Alert goes
off and/or there is
a slight decrease
in filter life
remaining gauge
HEPA filter loading
The gauge reading steadily
decreases as the cabinet is used.
A very slow decrease (over months)
is normal
Blockage of the
return air slots or
grille
Check all return air slots and grilles
to ensure that they are not blocked
or restricted
Blockage of the
exhaust outlet
Ensure that the exhaust outlet is not
blocked or restricted
Blockage or
restriction under
the work surface
Ensure that the towel catch and
plenum beneath the work surface
are unobstructed
Exhaust Airflow
Check goes off
and alarm sounds
30 seconds after
the blower is
started
Roof blower is off
Ensure that roof blower is working
Exhaust damper is
improperly set.
Ensure that the exhaust damper is
properly set by a qualified certifier
Remote blower is
improperly sized
Confirm that the roof mounted
blower meets the volume and
pressure requirements of the
cabinet
Mechanical failure
of the exhaust
system
Inspect the exhaust system.
Obstruction in the
exhaust system
Inspect the exhaust system
Leak or additional
‘load’ on the
exhaust system
Inspect the exhaust system
Loading of the
exhaust HEPA filter
Replace the Exhaust HEPA filter
Airflow Sensor out
of calibration
Have qualified certifier recertify
airflows and recalibrate the sensor