Labconco Biological Safety Cabinets 34610 Series - Manual (Page 56)

Chapter 7: Troubleshooting
Product Service 1-800-522-7658 51
PROBLEM CAUSE CORRECTIVE ACTION
Airflow Alert goes
off and/or there is a
slight decrease in
filter life remaining
gauge Supply HEPA filter
loading The gauge reading steadily decreases as
the Cabinet is used.
Blockage of prefilter
or its grille Check the prefilter and the air intake
located below it to ensure that they are
not blocked or restricted.
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.
Contamination of
work in the cabinet Improper technique
or procedure for the
Biosafety Cabinet See “Use of the Cabinet” section in the
manual.
Restriction of the
return air slots or
grille. Ensure that all return air slots, grilles
and the exhaust outlet are unobstructed.
External factors are
disrupting the cabinet
airflow or the source
of the contamination See “Installation” section of this
manual.
Cabinet is out of
adjustment/HEPA
filter(s) are defective Have cabinet recertified.