Emerson 250-400kVA manual If this alarm occurs on an operational unit, it

			UPS Alarm and Status Messages
Table 7	Liebert NXL alarm and status messages (continued)
Event Message		Event Definition	Recommended Action
		The correct input phase rotation should be
		clockwise, or A-B-C. This alarm indicates the
		sensed input phase rotation is counter-clockwise.	Press “SILENCE” to silence the audible alarm.
		If this alarm occurs on an operational unit, it
Inp Phase Rotation		typically indicates upstream work was performed	Verify correct phase rotation at the input.
		(input side) and the input wiring was connected	If the phase rotation is correct, contact your factory-
		incorrectly.	authorized service provider.
		This alarm is self-clearing. When the condition is
		no longer present, the alarm and any control
		activity tied to the alarm reverts to normal.
		The displayed text for this alarm is dependent on
		settings.
		In response to this alarm, the user may see 1 of 4
		possible messages:
		1. No message but the help icon (lowercase “i“)
		is present;
		2. A custom message programmed by the user;
		3. “Input Contact XY” if the contact is
		unconfigured;
		4. “Reduced Rect ILimit” if the contact is
		programmed as Pre-assigned.
		If this event is active, an external signal is wired
		into Channel Y of Input Contact Isolator #X.	Check the wires landed on Input Contact
		If the display shows Case 1 above (blank
Input Contact XY		message), it means the contact channel is set to	Isolator #X.
		default but the default message was erased.	If the signal is not active, or no wires are present,
		If the display shows Case 2, the user-	contact your factory-authorized service provider.
		programmed event is active and the displayed
		text is customer defined.
		If the display shows Case 3, the contact is active
		but was not pre-programmed (default condition).
		If the display shows Case 4, the controls force the
		Rectifier into Reduced Input Current Limit
		operation (this limits the amount of current
		available to charge the battery - typically during
		generator operation).
		This alarm message is self-clearing. When the
		condition is no longer present, the message and
		any control activity tied to the alarm will revert to
		normal.
Input Contact		Input Contact Interface #1 has failed to
Interface #1
Communication		communicate in a timely fashon.
Failure
Input Contact		Input Contact Interface #2 has failed to
Interface #2
Communication		communicate in a timely fashon.
Failure
			Press “SILENCE” to silence the audible alarm.
			Press “RESET” to attempt to clear the alarm
			condition.
		The detected input currents are not balanced.	If the alarm clears, press “Startup,” “Device
		This latching alarm indicates a potential problem	Control,” “Close Trap” to manually close the filter
Input Current		in the input filter. The controls automatically open	contactor.
Imbal		the filter contactor in response to this condition.	If the contactor remains closed, check the Input
		The filter contactor must be manually closed once	Meter and verify the input currents are balanced.
		it opens in response to this alarm.	If the contactor re-opens and the “Input Current
			Imbalance” returns, silence the alarm, leave the
			filter contactor open, and contact your factory-
			authorized service provider.

53