User manual

38 Chapter 5 Operator Control And Display Panel
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Prompt Meaning
OK
Please check the current warnings Check the active alarm messages
Enter control password Required for battery or UPS test (default: 123456)
Battery Self Test aborted, conditions
not met
Battery selt-test condition is not met. Please check whether the battery is in boost
charge state and the load is more than 20%
Battery Refresh Charge aborted,
conditions not met
This prompt appears when you select the Freshening charge command while the a
battery freshening charge condition (such as no battery, charger failure) is not met
5.8 Alarm List
Table 5-9 provides the complete list of UPS alarm messages for display either on the Event menu or on the Records
menu described in Table 5-7.
Table 5-9 Alarm list
Alarm Explanation
Comm. fail The communication of the internal monitor with the rectifier, inverter or bypass failed
Parallel Comm. Fail
The communication between the inverter of each UPS in the parallel system failed.
1.Check if any UPSs are offline. If yes, power on these UPSs and check if the alarm disappears.
2. Press the FAULT CLEAR button
Battery Overtemp. The battery temperature is over limit. Check the battery temperature and ventilation
Ambient Overtemp. The ambient temperature is over limit. Check the ventilation of the UPS room
Battery Replaced Battery test failed. The battery needs replacement
Battery Low Pre-warning
Before the EOD, battery low pre-warning will occur. After this pre-warning, the battery will have the
capacity for three minutes discharging with full load. The time is user-settable from 3 minutes to 60
minutes. Please shut down the load in time
Battery End of Discharge Inverters turned off due to battery EOD. Check the mains failure and try to recover it
Mains Volt. Abnormal
The mains voltage is outside specifications and results in rectifier shutdown. Check the rectifier input
phase voltage
Mains Undervoltage Mains voltage is under limit with derated load. Check the rectifier input line voltage
Mains Freq. Abnormal
The mains frequency is outside specifications and results in rectifier shutdown. Check the rectifier input
voltage and frequency
Batt. Charger Fail The voltage of the battery charger is too high
Control Power 1 Fail The UPS is operating but the control power is abnormal or not available
Mains Phase Reversed The AC input phase rotation is reversed
Rectifier Fault Internal fault of a power module is detected and results in rectifier shutdown and battery discharging
Rectifier Overtemp
The temperature of the heatsink is too high to keep the rectifier running. The UPS can recover from this
fault automatically. Check the environment and ventilation
Soft Start Fail
The rectifier can not start owing to low DC bus voltage. Seek assistance from the local customer
service center of Emerson
Bypass Unable to Trace
This alarm is triggered by an inverter software routine when the amplitude or frequency of bypass
voltage is outside specifications. The amplitude threshold is fixed for ±10% rating. This alarm
automatically resets once the bypass voltage goes normal.
1. First verify that the bypass voltage and frequency displayed on the LCD are within the selected
ranges. Note that here the rated voltage and frequency are specified by Output voltage level and
Output frequency level respectively.
2. If the displayed voltage is believed to be abnormal, then verify the bypass voltage and frequency
presented to the UPS. Check the external supply if it is found faulty
Bypass Abnormal
This alarm is triggered by an inverter software routine when the amplitude or frequency of bypass
voltage exceeds the limit. The amplitude threshold is fixed for ±10% rating. This alarm automatically
resets once the bypass voltage returns to normal.
1. First check if there are some relevant alarms such as Bypass phase reverse and Mains neutral lost.
If they appear, solve them first.
2. Then verify that the bypass voltage and frequency displayed on the LCD are within the bypass limits.
Note that here the rated voltage and frequency are specified by Output voltage level and Output
frequency level respectively.
3. If the displayed voltage is believed to be abnormal, then measure the bypass voltage and frequency
presented to the UPS. If the bypass voltage and frequency are abnormal, check the external bypass
supply.
4. If the mains is likely to trigger this alarm frequently, the bypass limits can be changed to a wider