How to Connect an EPO Switch to the ATS
3.Test the EPO switch to ensure it is wired properly and working correctly:
a.Place the Arm/Test rocker switch on the ATS monitoring unit in the Test position. The EPO state LEDs should be off and the ATS display interface should show the following alarm (in addition to any other active alarms):
Active Alarm xxofxx
EPO Ready To Test
b.Engage the EPO switch (if your switch is momentary, engage while one person is watching the EPO state LEDs and another is at the EPO switch).
c.Observe the EPO LEDs. If the switch is wired properly and working correctly, both of the EPO state LEDs should light red when the switch is engaged.
d.If the test was successful, return the Arm/Test rocker switch to the Arm position. The ATS display interface will clear the EPO test mode alarm. If the test was not successful, refer to the following troubleshooting chart:
Problem | Action | |
Neither state LED was lit red | • Check the wiring to your EPO switch. | |
when the EPO switch was | • Check to make sure the EPO DIP switch | |
engaged. | ||
configuration is correct for your switch | ||
| ||
| (NO or NC). See step 2 on the previous page for | |
| proper configuration instructions. | |
|
| |
Only one of the state LEDs was lit | • Check to make sure the EPO DIP switch | |
red when the EPO switch was | configuration is correct for your switch | |
engaged. | (NO or NC) and retest. See step 2 on the | |
| previous page for proper configuration | |
| instructions. |
•If the switch is configured correctly and both LEDs did not light red after retesting, contact APC customer support (see the back cover of this manual).
e.Repeat this test for each EPO switch installed.
4.After testing is completed, ensure the Arm/Test rocker switch is in the Arm position on the ATS monitoring unit.
InfraStruXure Power Generation System | 65 |