Siemens 125-5033 - Manual (Page 28)

20 Siemens Building Technologies, Inc.
4
Troubleshooting
This chapter describes corrective measures you can take should you encounter a problem
when using the Fume Hood Controller. For issues not covered in this section, contact your
local Siemens Building Technologies, Inc. representative.
You are not required to do any controller troubleshooting. Contact your local Siemens
Building Technologies, Inc. representative if a problem occurs or you have any questions
about the controller.
NOTE: When troubleshooting, record what the problem is and what actions were
performed immediately before the problem occurred. Being able to describe the
problem in detail is important should you need assistance from your local
Siemens Building Technologies, Inc. representative.
Basic Service Information
Always remove power to the controller when installing or replacing it. Since the controller
does not have a power switch, the recommended method of removing power to a locally
powered controller is to turn OFF the power to the 24 Vac transformer. The recommended
method of removing power to a controller on a power cable (even to service a single
controller) is to turn OFF the power at the transformer.
NOTE: When removing power to a controller to perform maintenance or service, make
sure that the person in charge of the facility is aware of this and that appropriate
steps are taken to keep the building in control.
Never remove the cover from the controller. There are no serviceable parts inside. If a
problem is found with a controller, contact your local Siemens Building Technologies
representative for replacement. An anti-static wrist strap is recommended when installing or
replacing controllers.
Preventive Maintenance
Most controller components are designed so that, under normal circumstances, they do not
require preventive maintenance. However, devices that are exposed to dusty or dirty
environments may require periodic cleaning to function properly. To ensure optimum system
performance, it is recommended that you discuss the operating requirements of your
application with your Siemens Building Technologies, Inc. representative to determine the
best service support program for your needs.