Liebert S3, 50 and 60 Hz user manual Liebert Global Services

Table 5	Alarm Messages (continued)
Alarm Message		Meaning	Corrective Action
Output Overload		The units total output power (the sum	Determine cause of the overload and
		of all three phases) has exceeded	reduce the load.
		the overload capacity of the unit. The
		load will be automatically transferred
		to bypass (if available).
Output Undervoltage		UPS output voltage or current is not	Contact Liebert Global Services if the
Output Overvoltage		within the acceptable range. The	UPS is not able to correct any one of
Overload Phase A		load has been automatically	these conditions.
Overload Phase B		transferred to bypass (if available).
Overload Phase C		An automatic retransfer will be
		attempted when the output voltage
		and current are within tolerance.
PFC Bus Voltage High		The inverter bus voltage is either	Contact Liebert Global Services.
PFC Bus Voltage Low		high or low or exceeded acceptable
PFC Hardware Shutdown		limits. The unit will transfer to bypass.
Site Wiring Error		Warning Alarm: The power	Disconnect power from the UPS
		conductors are not wired to the UPS	input and correct the wiring. Wiring
		input in the desired sequence.	should be verified or corrected by a
			qualified electrician.
System shutdown impending		The input filter may be clogged or 1	Check input air filter. Reduce the
due to over-temperature		or more cooling fans may have failed	system load as much as possible.
		and the internal temperatures are	Contact Liebert Global Services.
		approaching the automatic shutdown
		level.
System shutdown due to		The UPS system has shut down and	Contact Liebert Global Services.
internal over-temperature		transferred to Bypass as a result of a
		clogged input filter or failure of 1 or
		more fans.
Temporary Overload		The output waveform is distorted. If	Normally the condition will correct
		available, the UPS will transfer to	itself. If the unit has not corrected this
		bypass until the waveform distortion	condition within 30 minutes, contact
		is corrected.	Liebert Global Services.
UPS Overtemp		System shutdown impending due to	An over-temperature condition is
		over-temperature.	present in the UPS cabinet. The UPS
		This is a two-stage alarm. The same	will automatically transfer to bypass if
		message will occur if the system has	the over-temperature continues.
		reached over-temp and has	Determine the cause of the condition
		transferred to bypass as a result of	and correct it if possible. Check for
		the over-temp condition.	restricted air flow or fan failure.
		Other alarms will signal the transfer
		to bypass.
UPS Shutdown		The UPS has detected a fault and	Review and record alarm messages.
		has shut down, resulting in loss of	Contact Liebert Global Services.
		power to the critical load.

Liebert Global Services 1-800-543-2378

Operation 55