Specifications

Troubleshooting Resources 4–5
Troubleshooting Table
After diagnosing a problem, use Table 4–1 to resolve it.
Table 4–1 Troubleshooting Table (Sheet 1 of 7)
Symptom Possible Cause Investigation Remedy
Reset button not lit. No power to subsystem. Check power to subsystem
and power
supplies on controller’s
shelf.
Replace cord or AC input
power module.
Make sure that all cooling
fans are installed. If one or
more fans are missing or all
are inoperative for more
than eight minutes, the EMU
shuts down the subsystem.
Turn off power switch on AC
input power module. Replace
cooling fan. Restore power to
subsystem.
Determine if the standby
power switch on the PVA
was pressed for more than
five seconds
Press the alarm control
switch on the EMU.
Failed controller. If the foregoing check fails
to produce a remedy, check
OCP LED codes.
Replace controller.
Reset button lit steadily;
other LEDs also lit.
Various. See OCP LED Codes. Follow repair action using
Table 4–4.
Reset button blinking;
other LEDs also lit.
Device in error or FAIL set
on corresponding device
port with other LEDs lit.
SHOW
device FULL Follow repair action using
Table 4–5.