Forma Scientific, Inc.___________________________________________Troubleshooting
7-1
Section 7 - Troubleshooting
7.1 Troubleshooting Guide
The following is a guide to troubleshooting the system. If a contaminated area of the
cabinet must be entered to determine and/or resolve the source of a particular problem, the
cabinet must first be decontaminated.
Servicing of the unit must be performed by qualified service personnel.
Problem 1: Air flow in the cabinet work area and through the exhaust filter is inadequate.
Possible causes:
• Exhaust filter is blocked by laboratory materials or the protective shipping cover.
• If the biological safety cabinet is connected to an exhaust system, there may be inadequate
exhaust suction or back pressure in the duct system. The system must be rebalanced to
handle the correct air volume. A Biological Safety Officer should be consulted.
• Low voltage being applied to the blower motor.
• Blower motor or speed control is defective.
• Supply HEPA filter and Exhaust HEPA filter may be loaded. Decontaminate the unit
and replace both HEPA filters.
Before any maintenance work is performed in the biological safety cabinet,
the unit must first be decontaminated.
Problem 2: Ultra violet light malfunction
Possible causes:
• Check lamp pins and socket ends for contact.
• Defective starter for the U/V light.
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