5.7 Alarm List
Table 5.4 below provides the complete list of UPS alarm messages for display either on the 'Event' menu or on the 'Records'
menu.
Alarm Ex pla na tion
Fault Clear FAULT CLEAR key on the operator control and display panel pressed
Rectifier in Setting The rectifier starts up and is in synchronization
Inverter in Setting The inverter starts up and is in synchronization
Inverter Manual On INVERTER ON key on the operator control and display panel pressed to turn on the inverter
Inverter Manual Off INVERTER OFF key on the operator control and display panel pressed to turn off the inverter
Turn On Fail
The inverter failed to turn on when the INVERTER ON key is pressed. This may be the result of an invalid operation
(maintenance bypass switch closed) or DC bus or rectifier not ready
Rec. Soft Start Fail Owing to low DC bus voltage, the rectifier will report this alarm
Silence Active SILENCE ON/OFF key on the operator control and display panel pressed
Silence Inactive SILENCE ON/OFF key on the operator control and display panel pressed in alarm silence state
Bypass Mode The UPS is in bypass mode
Normal Mode The UPS is in normal mode
Battery Mode The UPS is in battery mode
Check UPS Output UPS shutdown with no output power
Output Disabled EOD event happened. Check the battery voltage
Other Bypass STS Fail The adjacent bypass STS open circuit fault or short-circuit fault
Input Voltage Abnormal The mains voltage is outside specifications and results in rectifier shutdown
Input Undervoltage At least one phase main input voltage is within 132 V to 176 V, thus the load should be derated
Input Freq. Abnormal The mains frequency is outside specifications and results in rectifier shutdown
Input Phase Reversed The AC input phase rotation is reversed
Input Backfeed Battery voltage fed back to rectifier input
Input Neutral Lost AC rectifier input neutral line not detected
Input Current Abnormal Battery load sharing imbalance or rectifier input current abnormal
Input Current Limit Input current over limit
Bypass Unable to Trace
The voltage amplitude or frequency of bypass is out of the range of protection (the range is set in parameter). This alarm
automatically resets once the bypass voltage goes normal
Bypass Abnormal
The amplitude or frequency of the bypass voltage exceeds the limit. This alarm automatically resets once the bypass
voltage returns to normal
Bypass STS Fail At least one of the STSs at the bypass side is open or shorted. This fault is locked until power-off
Byp. Abnormal Shutdown Both the bypass and inverter voltages are abnormal, and the output is off
Bypass Phase Reversed The phase rotation of the bypass voltage is reversed
Table 5.4 A larm list
5 Operator Control and Display Panel
89
Vertiv™ Liebert® APM Plus User Manual
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