Thermo Scientific 1310 Operating Instructions Manual page 50

Operating Instructions Safety Cabinet | 1300 Series B2
7. Troubleshooting
PROBLEM
UV light not working
UV light is dim or
flickering
Airflow Alert goes off
and/or there is a slight
decrease in filter life
remaining gauge
Alarm sounds 15
seconds after the
blower is started
46
CAUSE
Sash is open
Lamp is defective
Lamp wiring is
disconnected
Defective lamp ballast
Keypad disconnected or
defective
Lamp is defective or is
at end of operating
lifetime
Lamp wiring is
disconnected
Defective lamp ballast
Supply HEPA filter
loading
Blockage of prefilter or
its grille
Roof blower is off
Exhaust damper is
improperly set.
Remote blower is
improperly sized
Mechanical failure of
the exhaust system
Obstruction in the
exhaust system
Leak or additional 'load'
on the exhaust system
Loading of the exhaust
HEPA filter
CORRECTIVE ACTION
Close sash – UV light will not work with the
sash open.
Replace defective lamp.
Inspect lamp wiring.
Replace lamp ballast.
Run keypad diagnostics and check
connections.
Replace defective or worn out lamp.
Inspect lamp wiring.
Replace lamp ballast.
The gauge reading steadily decreases as
the Cabinet is used.
Check the prefilter and the air intake located
below it to ensure that they are not blocked
or restricted.
Ensure that roof blower is working.
Ensure that the exhaust damper is properly
set by a qualified certifier.
Confirm that the roof mounted blower meets
the volume and pressure requirements of
the cabinet.
Inspect the exhaust system.
Inspect the exhaust system.
Inspect the exhaust system.
Replace the Exhaust HEPA filter.