Your UPS has received a signal or command from

			Troubleshooting

Table 6	Troubleshooting table (continued)

	Problem	Cause	Solution

Fault and Bypass indicators			UPS requires service. Contact your local dealer,
and diagnostic C indicator are		UPS DC/DC fault	UPS requires service. Contact your local dealer,
and diagnostic C indicator are		UPS DC/DC fault	Emerson® representative or Emerson Channel Support.
illuminated

Fault indicator and diagnostic		UPS PFC (Power Factor	UPS requires service. Contact your local dealer,
D indicator are illuminated		Correction Circuit) fault	Emerson representative or Emerson Channel Support.

Fault and Bypass indicators			UPS requires service. Contact your local dealer,
and diagnostic E indicator are		UPS inverter fault	UPS requires service. Contact your local dealer,
and diagnostic E indicator are		UPS inverter fault	Emerson representative or Emerson Channel Support.
illuminated			Emerson representative or Emerson Channel Support.
illuminated

Fault indicator and diagnostic			Replace batteries. Contact your local dealer, Emerson
A and C indicators are		UPS failed the battery test	Replace batteries. Contact your local dealer, Emerson
A and C indicators are		UPS failed the battery test	representative or Emerson Channel Support.
illuminated			representative or Emerson Channel Support.
illuminated

			Your UPS has received a signal or command from the
Fault and Bypass indicators		UPS has been shut down by a	attached computer. If this was inadvertent, ensure the
and diagnostic C and E		command from the	communication cable used is correct for your system.
indicators are illuminated		communications port(s)	For assistance, contact your local dealer, Emerson
			representative or Emerson Channel Support.
		UPS failure (includes dual-fan
Fault indicator and diagnostic		failure, single-fan failure under	Ensure fan is not blocked up. If the fault is not removed,
A and B indicators are		certain conditions and battery	contact your local dealer, Emerson representative or
illuminated		charger failure) and continuous	Emerson Channel Support.
		alarm
		UPS detected a line-to-neutral
		reversal or a loss of proper
		grounding for UPS; continuous
		horn and UPS cannot start up
		in standby status. This is active	Contact a qualified electrician to verify site wiring.
AC input indicator is flashing.		only when power is first	Contact a qualified electrician to verify site wiring.
		applied to the input. Once the
		UPS is running, the AC input
		indicator will flash, unless the
		input wiring is correctly
		changed.
			Check battery connections, completely power down and
		Battery source is not available;	restart UPS.
Battery indicator is flashing.		Battery source is not available;	NOTE: If the battery circuit opens while the UPS is
Battery indicator is flashing.		continuous horn.	NOTE: If the battery circuit opens while the UPS is
		continuous horn.	running, it will be detected when the next battery test is
			running, it will be detected when the next battery test is
			performed.
			The AC input powers the PFC input and serves as the
		Because the voltage or	bypass source. If the AC is present but the voltage or
Bypass indicator is flashing.		frequency is outside	frequency exceeds the acceptable range for safe
Bypass indicator is flashing.		acceptable limits, the bypass is	operation with a load, the bypass will be disabled and
		acceptable limits, the bypass is	operation with a load, the bypass will be disabled and
		disabled.	this indicator will flash, indicating that the bypass is
			unavailable.

When reporting a UPS issue to Emerson, include the UPS model and serial number. These are on the top panel of the Liebert GXT3.

Liebert® GXT3™

Troubleshooting table (continued)

Problem

Your UPS has received a signal or command from the