American Power Conversion PDU - Manual (Page 27)

Installation Procedures: Connect an Emergency Power Off Switch
150kW InfraStruXure System—Installation and Start-Up 19
3. Test the EPO switch to ensure that it is wired and working correctly:
a. Place the Arm/Test rocker switch in the Test position. The EPO state LEDs will be off and
the PDU display interface will show the following alarm (in addition to any other active
alarms):
b. Engage the EPO switch. (If your switch is momentary, engage it with one person watching
the EPO state LEDs, and another at the EPO switch.)
c. Observe the EPO LEDs. If the switch is wired and working properly, when the switch is
engaged, both of the EPO state LEDs are red.
d. If the test was successful, place the Arm/Test rocker switch back to the Arm position. The
PDU display interface will clear the EPO test mode alarm. If the test was not successful, see
the following troubleshooting chart.
e. Repeat this test for each EPO switch installed.
4. Ensure that the Arm/Test rocker switch is in the Arm position on the monitoring unit.
Problem Action
Neither State LED was red when EPO
switch was engaged. • Check the wiring to your EPO switch.
• Check to make sure the EPO DIP switch
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 red
when the EPO switch was engaged. • Check to make sure that the EPO DIP switch
configuration is correct for your switch (NO or NC)
and test again. See step 2 on the previous page for
proper configuration instructions.
• If the switch is configured correctly and both LEDs
are not red after testing again, contact customer
support at a number on the back cover of this
manual.
EPO Ready To Test
Active Alarm xxofxx