3Com 8800 manual ENGINEERING, Maintenance Troubleshooting, LED Indication

ENGINEERING, MAINTENANCE AND

5 TROUBLESHOOTING

Maintenance and	This section provides field maintenance information and troubleshooting procedures
Troubleshooting	for the PoE Power Rack and power supply modules. Review the safety information in
	section 3 of this manual before performing maintenance procedures
	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 Table 6 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 6 Troubleshooting Guide

Controller alarm	Power supply
	module
status	display	Possible problems		Possible solution
RUNALM	NONE	■	The AC power input	1	Verify that AC
			circuit breakers has		power input
			opened.		circuit breaker is
		■ AC input voltage is too			closed; close
					circuit breaker if
			low or power is lost
					it is open.
				2	Verify the AC
					power is present
					and in normal
					range.
RUNALM	AC OKFAULT	■	Power supply module	Replace the power
			failure	supply module
		■	Output beyond normal
			range
RUNALM	AC OKDC	Communication error		Replace the power
	OKFAULT	between the power supply		supply module
		module and the controller
RUNALM	AC OK	■	Power supply module has	1	Initialize the
			no output and it is in		power supply
			standby mode		module or reset
		■	Over load		the controller.
				2 Check if the load
		■	Ambient temperature is
					is over the
			too high
					rating.
			Power supply module
		■		3	Check the
			failure;
					ambient
					temperature.
				4	Replace the
					power supply
					module