Owner`s manual

4–4 Troubleshooting
e. Verify that the line voltage selector switch on the rear panel of the
power supply is set to the correct line voltage. Refer to Figure 4–1
for the location of the line voltage selector switch.
f. Attempt to restart the enclosure.
2. If the drive dc power switches on the front panel of the enclosure are
blinking, an overload at the output of the power supply is the likely
cause.
a. Place all OCP buttons for each disk ISE in the out (off) position.
Refer to Figure 4–2.
b. Turn off all drive dc power switches.
c. Turn on the drive dc power switches one at a time. If the indicator
on a drive dc power switch illuminates steadily when you turn it
on, that disk ISE is not causing the overload. When you turn on
a switch and the indicator blinks, you have found the overload.
Turn that switch off and resume operation on the remaining disk
ISEs.
d. Call Digital Customer Services.
3. If a single disk ISE is not communicating with the system controller
or does not respond to control panel commands (all other disk ISEs
are normal):
a. Make sure the Ready button for that disk ISE is asserted.
b. Record any fault code displayed on the OCP, as described in
Section 4.2.
c. Reset all OCP switches for that disk ISE. If the disk ISE was on-
line previously, dismount it from the system and take it off-line.
Spin the disk ISE down by pressing the Ready button. When the
Ready indicator goes out, set the front panel drive dc power switch
to off (Figure 4–2). Removing power to the disk ISE for 10 seconds
resets the disk ISE’s circuits.
d. Verify that the DSSI cable connectors from the host system are
securely tightened at the cabinet I/O bulkhead of the enclosure.
e. Bring the disk ISE back on-line and attempt to restore normal
operation.