Labconco Fiberglass 30 Laboratory Fume Hoods 3030005 - Manual (Page 44)

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Chapter 8: Troubleshooting
PROBLEM CAUSE CORRECTIVE ACTION
Fume hood blower
operates but light
will not operate Lamp wiring is
disconnected. Inspect lamp wiring.
Defective lamp. Replace lamp.
Contaminants
outside of fume
hood Improper user
techniques for the
fume hood. See “Certifying the Hood” Chapter 3
and “Safety Precautions” Chapter 4
sections in the manual. (Ref. Appendix
D)
Restriction of the
baffle air slots or
blockage of the
exhaust outlet. Remove baffles to ensure that all air
slots and the exhaust outlet are
unobstructed.
External factors are
disrupting the fume
hood airflow patterns
or acting as a source
of contamination. See “Location Requirements” Chapter
2, “Certifying the Hood” Chapter 3,
and “Safety Precautions” Chapter 4
sections of this manual. (Ref. Appendix
D)
Fume hood has
improper face
velocity. Have fume hood re-certified and check
remote blower exhaust system. Hood
should have average face velocity of
80-100 fpm.
Vertical-rising sash
no longer operates
smoothly Cable is frayed or
plastic protection is
damaged. Inspect cable and replace cable if worn
or damaged immediately; otherwise
injury could result.
Pulley bearing is
damaged. Replace pulley, bearing or add grease.
Cable has slipped off
the pulleys. Re-install, cable must be replaced
immediately if damaged.
Weight has broken
pulleys. Replace weight pulleys.