Part Two
Replacement Parts
All components of the Face Velocity Control system are field replaceable. Contact TSI or your
nearest TSI Manufacturer's Representative for replacement part pricing and delivery.
Model FHC50 Fume Hood Controller
Velocity/Controller Sensor Cable
Troubleshooting Section
The Model FHM10 Fume Hood Monitor and FHC50 Fume Hood Controller is designed to be
trouble free. However, installation problems or interaction with other HVAC components may
cause system problems. The system is easy to troubleshoot if an organized approach to evaluate
the system is taken. Troubleshooting is broken down into hardware (mechanical) and software
problems. Hardware problems deal with the physical installation of the device. Hardware
problems include wiring problems, incorrectly installed equipment, and add-ons or non-TSI
equipment. Software problems include control problems, configuration problems, or interaction
problems with the HVAC system.
The hardware test described in this section determines that all TSI mechanical components are
functioning correctly. The hardware test requires the diagnostics menu items to be accessed. If
you are unfamiliar with the controller menus, see Software Programming for keystroke procedure.
Troubleshooting the majority of problems is usually quick if the hardware test is followed.
Software and hardware problems are covered in the troubleshooting chart. Pick the problem that
most closely resembles your problem and review the possible symptoms and corrective action.
Software or system performance problems can and are affected by the supply air system,
exhaust air system, or physical configuration of the room. Separating TSI system problems from
the laboratory HVAC system can sometimes be difficult. TSI recommends confirming all
hardware is operating correctly before troubleshooting software problems.
Hardware Test
Three tests need to be performed in order to determine all hardware is functioning correctly. The
tests are broken down into:
Confirming wiring is correct.
Confirming physical installation is correct.
Verifying mechanical components.
Confirming wiring is correct
The most common problem with installed hardware equipment is incorrect wiring. This
problem usually exists on initial installation, or when modifications to the system take place.
The wiring should be very closely checked to verify it exactly matches the wiring diagram.
Wiring diagrams are located in Appendix C of this manual. Wiring associated with non-TSI
components should be closely checked for correct installation. If non-TSI components are
installed, consider disconnecting them for testing purposes.
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