ZyXEL Communications IES-1248-51A, User Manual

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IES-1248-51V User’s Guide
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H A P T E R
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Troubleshooting
This chapter covers potential problems and possible remedies. After each problem
description, some steps are provided to help you to diagnose and solve the
problem.
70.1 The SYS or PWR LED Does Not Turn On
The SYS/PWR LED does not turn on.
70.2 The ALM LED Is On
The ALM (alarm) LED lights when the IES-1248-51V is overheated, the fans are
not working properly, the voltage readings are outside the tolerance levels or an
alarm has been detected on the ALARM input pins.
Table 216 SYS LED Troubleshooting
STEP CORRECTIVE ACTION
1 Make sure the power wires are properly connected to the power supply and
the power supply is operating normally. Make sure you are using the correct
power source (see
Chapter 71 on page 579 ).
2 Make sure the power wires are connected properly.
3 Make sure a fuse is not burnt-out. Replace a fuse if it is burnt-out. See
Appendix A on page 595 for instructions.
4 The LED itself or the unit may be faulty; contact your vendor.
Table 217 ALM LED Troubleshooting
STEP CORRECTIVE ACTION
1 Use the statistics monitor command to verify the cause of the alarm. See step
2 if the unit is overheated, step 3 if the problem is with the fans and step 4 if
the voltages are out of the allowed ranges.
2 Ensure that the IES-1248-51V is installed in a well-ventilated area and that
normal operation of the fans is not inhibited. Keep the bottom, top and all
sides clear of obstructions and away from the exhaust of other equipment.