User guide

MultiArray User Guide

Troubleshooting

The recommended troubleshooting process for the MultiArray is to determine the following

results:

• Is the rack plugged in and does the wall plug have power.

• If power supply ALARM sounds:

1) Check to see if power supply LEDs are ON and fans are running.

2) If power supply LED is OFF, check that power supply is turned on.

3) If power supply LED is OFF and fans are not running, turn power supply module off

for at least 10 minutes. Then, turn back on. If power supply module still fails, then

replace the power supply module.

4) Push Alarm Reset Switch (red button) to turn off (reset) alarm.

5) Power supply module can be replaced by turning module off, removing screw and

pulling module out. Put the new module in, replace the screw, and turn the module

on.

• If a subsegment power switch is ON and its LED for that group of segments is OFF, and

the four main power LEDs on the backplane are ON, the subsegment is bad. Contact

Tech Support for assistance in returning unit, refer to Chapter 5.

• If one of the eight power LEDs (two sets of four LEDs) on the backplane is OFF, the

power supplies may be defective or a defective backplane. Contact Tech Support for

assistance in returning unit, refer to Chapter 5.

• If intermittent problems with SBCs, SBC will not power up correctly, or fans seem to be

slowing down, check the following:

1) Check that the disk drive cables are connected correctly, pin 1 to pin 1 (red line) on

all cables from SBC to mux board.

2) Check that other SBC cables are connected correctly.

3) If cabled correctly and a problem still exists, move SBC to another segment, if

problem goes away, subsegment is bad. Contact Tech Support for assistance in

returning unit, refer to Chapter 5.

4) If problem still exists after moving to another segment, problem is probably in SBC,

replace SBC.

• Disk drive does not work, check the following:

1) Subsegment power switch is turned ON.

2) Check that disk drive is cabled correctly, pin 1 on drive to pin 1 (red line) on cable.

3) Check for 5 and 12 volts on subsegment power cable. The 5V is the red lead (left

side) and 12V is the yellow lead (right side). The center two leads are ground. If

either voltage is 5% less than its designated value, subsegment is bad. Either move

boards to another segment or contact Tech Support for assistance in returning unit.

Refer to Chapter 5.

Red

12V

Yellow

4) Check that ribbon cables and power cable for the same segment are connected to

the drive (i.e., cables for segment 6 are connected to drive if segment 6 is intended

segment).