Siemens 125-1957 Owner's Manual - Page 41

Browse online or download pdf Owner's Manual for Controller Siemens 125-1957. Siemens 125-1957 48 pages. Apogee unit vent controller ⎯ 0 to 10v output

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Troubleshooting

Overview

This chapter describes corrective measures you can take should you encounter a problem

when using a Unit Vent Controller.

You are not required to do any controller troubleshooting. You may want to contact your local

Siemens Building Technologies representative if a problem occurs or you have any questions

about the controller.

NOTE:

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:

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.

Siemens Building Technologies, Inc.

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 representative.

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.