Liebert NX UPS System user manual Mimic Power Flow, Audible Alarm Buzzer

Operator Control Panel and Display

7.1.1Mimic Power Flow

The LEDs mounted on the mimic flow chart represent the various power paths and current UPS oper- ational status.

Table 12	Rectifier indicator—1
Green		Rectifier in Normal Operation
Flashing		Input AC Normal, but rectifier not operating
Green
Red		Rectifier Failed
Off		Rectifier Not operating, Input AC Not Available or out of normal range

Table 13	Battery indicator—2
Green		Battery Normal, but discharging and powering the load
Flashing		Battery End of Discharge pre-warning
Green
		Battery abnormal (Failed, Absent or Polarity Reversed) or Battery
Red		Converter abnormal
		(Failed, overcurrent, overtemperature)
Off		Battery and Converter Normal, Battery charging.

Table 14	Bypass indicator—3
Green		Load on Bypass power
Red		Bypass not available, out of normal range or Static bypass switch fault.
Off		Bypass Normal, load not on bypass

Table 15	Inverter indicator—4
Green		Inverter Normal and powering the load
Flashing		Inverter ON, starting up, synchronising,
Green		or standing by (ECO mode)
Red		Inverter failed
Off		Inverter not operating

Table 16	Load indicator—5
Green		UPS output ON and Normal
Red		UPS output ON and Overloaded
Off		UPS output OFF.
Table 17 Status (Alarm) indicator—6
Green		Normal Operation
Yellow		UPS Warning e.g. AC Input Failure
Red		UPS fault e.g. Fuse or Hardware failure

7.1.2Audible Alarm (Buzzer)

UPS activity is accompanied by the following sounds

Table 18 Audible alarm key

Single beep	Direct Access key acknowledgement
One beep	UPS Warning e.g. AC Input Failure
per second
Continuous	Fault e.g. Fuse or Hardware failure
beep

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