Chapter 5 Engineering, Maintenance And Troubleshooting; Maintenance And Troubleshooting; Led Indication - 3Com 7750 User Manual

PoE Power Rack Installation Guide

Chapter 5 Engineering, Maintenance and Troubleshooting

Maintenance and Troubleshooting

This section provides field maintenance information and troubleshooting procedures for the PoE Power Rack
and power supply modules. Review the safety information in section 3 of this manual before performing
maintenance procedures
Warning:
All procedures described in this section must be performed by qualified maintenance personnel only.
The power supply modules are not field serviceable and must be replaced in the event of a failure.

LED Indication

Use the following table to determine if there is a fault with PoE Power Rack.
When visual indicators do not identify a defective part, notify your authorized service representative.
Table 5-1 Troubleshooting guide
Controller Power supply
alarm status module display
RUN NONE
ALM
RUN AC OK
ALM FAULT
RUN AC OK
ALM DC OK
FAULT
RUN AC OK
ALM
ALM or None --
Possible problems
•The AC power input circuit
breakers has operated.
•AC input voltage is too low or
power lost
Power supply module failure
Output beyond normal range
Communication error between the
power supply module and the
controller
Power supply module has no output
and it is in standby mode
Over load
Ambient temperature is too high
Power supply module failure
Controller failure
5-1
Chapter 4 Installation and Debugging
Possible solution
1. Verify that AC power input circuit breaker is
closed; close circuit breaker if it is open.
2.Verify the AC power is present and in normal
range
Replace the power supply module
Replace the power supply module
Command the power supply module to work or
reset the controller
Check if the load is over the rating.
Check the ambient temperature.
Replace the power supply module
Replace the controller