Class II, Type A2 Biosafety Cabinet
User Manual
16
Troubleshooting
This section is to be used as a general guideline. An independent certification agency or a qualified technician
specializing in repairs and testing of this type of equipment must do any maintenance or repairs that need to be
made.
Trouble Possible Causes Remedy
Air supply inoperative Main switch off
Check main switch
See that plug is in the electrical
outlet
Green light switch should be on
No air circulation
Blower off Check motor blower control
Blown circuit breaker
Check circuit breaker on control
panel
Break in electrical wiring
Use electrical diagram and check
wiring connections
Excessive blower vibration
Foreign matter in blower squirrel
cage
Remove paper, paper clip, etc.
Exhaust air imbalance
Obstruction over exhaust filter Remove obstruction
Improper adjustment of blower
motor control
Adjust to proper reading on
Magnehelic gauge
Obstruction of plenum Remove obstruction
Leak between blower and
plenum
Repair leak – Contact
certification company
Filter loaded
Replace Filters – Contact
certification company
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