Labconco Total Exhaust Biological Safety Cabinets 30368 Series - Manual (Page 55)

Chapter 7: Troubleshooting
Product Service 1-800-522-7658 49
Original instructions
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.
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 Error goes
off and alarm
sounds 15 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.