
168 Troubleshooting the Pathlight VX
SPS LEDs
The standby power supply (SPS) provides four status LEDs. Figure 27 shows their location and Figure 22
describes their function.
Figure 27 SPS Back Panel LEDs
Table 22 SPS Back Panel—LED Activity
LED Color Status Meaning
Active None OFF AC line input is turned off or not available.
Green Blinking The battery is charging.
AC line input is supplying the output from the SPS.
Green ON The SPS is ready and operating normally.
AC line input is supplying the output from the SPS.
On battery None OFF The SPS is not using the battery.
Amber ON The AC line power is no longer available.
The battery is supplying the output from the SPS.
Replace
battery
None OFF The SPS does not need to have the battery replaced.
Amber ON The SPS battery pack can no longer support loads.
This LED stays active until the SPS completes a
successful power test. Contact ATAC to have the
battery replaced. For contact information, refer to
Getting More Information or Help
on page 4.
Fault None OFF The SPS is not experiencing a fault.
Amber ON The SPS has an internal fault. The SPS may still be
able to run online, but write-caching cannot occur.
Contact ATAC to have the battery replaced. For
contact information, refer to Getting More Information
or Help on page 4.
Active
On battery
Replace battery
Fault
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