Maintenance and Technical Manual
Chapter 5
Interceptor Biological Safety Cabinet Class II A2
October 2019
5.1
CHAPTER 5
Troubleshooting
Problem
Possible Cause
Recommended Fix
No lights or
fan
a. Unit unplugged
Plug it in
b. BSC breaker open
Reset breaker
c. Building breaker open
Check outlet breaker
No fan
a. Sash not at operating height
Move sash to operating height
b. Sash microswitch not activated
Adjust microswitch position so switch is activated when
sash is at operating height
c. Motor control broken
Replace motor control. If condition persists, motor may
need replacement. Contact Kewaunee for assistance.
Fluorescent
light not
working
a. Lamp burnt out (look for dark
rings at opposite ends of glass
fluorescent tube)
Replace lamp
b. Lamp wiring defective
Inspect and repair
c. Bad lamp ballast (symptom is
intermittent light)
Replace ballast located inside rooftop circuit box
UV light does
not illuminate
a. Sash must be closed for UV light to
work (regular glass blocks UV rays)
Close sash
b. Lamp burnt out
Replace lamp
c. Lamp wiring defective
Inspect and repair
d. Bad lamp ballast (symptom is
intermittent light)
Replace ballast located in electrical box
Reduced face
velocity
a. HEPA filter loaded
Increase motor RPM or replace filter if 100 fpm
face velicity is no longer achievable
b. Towels have clogged towel screen
or visible baffle louvers
Clean towel screen
(see Chapter 5 User & Operation Manual)
c. Exhaust outlet clogged with debris
Clear outlet
Table 5.1
Technical Support
For further technical assistance, contact Kewaunee at 704-873-7202 or
www.kewaunee.com.
Summary of Contents for Interceptor INT-1100A2
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