Liebert Comprehensive Troubleshooting Guide for GXT2 Models

Troubleshooting

Table 3	Troubleshooting guide
Problem		Cause	Solution
UPS fails to start when the		UPS is short-circuited or	Ensure UPS is OFF. Disconnect all loads and ensure nothing is
			lodged in output receptacles.
ON button is pressed.		overloaded.
			Ensure loads are not defective or shorted internally.
		UPS not plugged in.	UPS is operating from battery mode, make certain UPS is
			securely plugged into the wall receptacle.
		UPS input protection has	UPS is operating from battery mode. Save data and close
Battery indicator LED is			applications. Check UPS input circuit breaker, then restart
		opened.
illuminated.			UPS.
		Utility voltage out of UPS	UPS is operating from battery mode. Save data and close
			applications. Ensure utility supply voltage is within acceptable
		input range.
			limits for UPS.
		Batteries are not fully	Keep UPS plugged in continuously at least 24 hours to
		charged.	recharge batteries.
UPS has reduced battery		UPS is overloaded.	Check load level display and reduce the load on the UPS.
time.
		Batteries may not be able to	Replace batteries. Contact your local dealer, Liebert
			representative or the Liebert Worldwide Support Group for
		hold a full charge due to age.
			replacement battery kit.
Fault and Bypass indicator		UPS overloaded or load	Check load level display and remove non-essential loads.
LEDs and all load level LEDs			Recalculate the load and reduce number of loads connected to
are illuminated.		equipment is faulty.	UPS. Check load equipment for faults.
		UPS internal fan has a	Ensure UPS is not overloaded, ventilation openings not
Fault and Bypass indicator			blocked, or room ambient temperature is not excessive. Wait
		problem or UPS shutdown
LEDs and diagnostic LED A			30 minutes to allow UPS to cool, then restart UPS. If UPS does
		due to temperature condition.
are illuminated.		Load is on bypass power.	not restart, contact your local dealer, Liebert representative or
			the Liebert Worldwide Support Group.
Fault and Bypass indicator		UPS internal DC bus	UPS requires service. Contact your local dealer, Liebert
LEDs and diagnostic LED B
		overvoltage.	representative or the Liebert Worldwide Support Group.
are illuminated.
Fault indicator LED and			Bus voltage under 315VDC (O/P 220VAC) / 330VDC
		DC-DC failure during battery	(O/P 230VAC) / 345VDC (O/P 240VAC). UPS requires service.
diagnostic LED C are
		mode.	Contact your local dealer, Liebert representative or the Liebert
illuminated.
			Worldwide Support Group.
Fault and Bypass indicator		UPS PFC (Power Factor	UPS requires service. Contact your local dealer, Liebert
LEDs and diagnostic LED D
		Correction Circuit) fault.	representative or the Liebert Worldwide Support Group.
are illuminated.
Fault and Bypass indicator			UPS requires service. Contact your local dealer, Liebert
LEDs and diagnostic LED E		UPS inverter fault.
			Representative or the Liebert Worldwide Support Group.
are illuminated.
Fault indicator LED and			Replace batteries. Contact your local dealer, Liebert
diagnostic LEDs A and C are		UPS failed the battery test.
			representative or the Liebert Worldwide Support Group.
illuminated.
			Your UPS has received a signal or command from the attached
Fault and Bypass indicator		UPS shutdown due to a	computer. If this was inadvertent, ensure the communication
LEDs and diagnostic LED C		command from the	cable used is correct for your system. For assistance, contact
and E are illuminated.		communications port(s).	your local dealer, Liebert representative or the Liebert
			Worldwide Support Group.
Fault and LEDs A&E are			Check for external obstruction entering fan guard. UPS
		Fan locked	requires service. Contact your local dealer, Liebert
Illuminated
			representative or Liebert Worldwide Support Group.
Fault and LEDs B&C are		REPO active	REPO circuit loop is open. If not used, a wire jumper must
Illuminated			connect the REPO terminals.
		UPS is OFF due to previous
Fault and LEDs B&D are		REPO shutdown, but the
		REPO has been connected	Start the UPS using the front panel.
Illuminated
		or reset. Autorestart
		disabled.

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