Chapter 8: Troubleshooting
Product Service 1-800-522-7658
40
Original instructions
PROBLEM
CAUSE
CORRECTIVE ACTION
Fume hood blower
operates but lights
will not operate
Lamp wiring is
disconnected.
Inspect lamp wiring.
Defective lamp
ballasts.
Replace lamp ballasts.
Contaminants
escape 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 100
fpm.
Vertical 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.
Combination A-
Style sash no longer
operates smoothly
Horizontal-sliding
glass panels have
come off the tracks.
Re-install horizontal-sliding glass on
tracks.
