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Operation And Display Panel
5.4 Prompt Window
A prompt window is displayed during the operation of the system to alert you to certain conditions and/or to require your
confirmation of a command. The prompts and meanings are given in Table 5-7.
Prompt
Transfer with interrupt, confirm or cancel
This operation leads to output shutdown,
confirm or cancel
Turn on more UPS to carry current load
Battery will be depleted, confirm or cancel
System self-test finished, everything is ok
System self-test finished, please check the
current warnings
Enter control password
Battery self-test condition is low, please check
battery state and load level
Forcing charge condition is low, please check
battery state
Check the wiring according to the settings,
power-off takes effect, 3-phase (1-phase)
output
5.5 UPS Alarm Message List
Table 5-8 gives the UPS alarm message list based on the 'Event' and 'Records' menus.
Alarm message
Inverter comm. fail
Internal communication failure between the monitoring board and the inverter
Rectifier comm. fail
Internal communication failure between the monitoring board and the rectifier
The communication failure between different UPS within a parallel system.
1. Check if there are some UPS not powered on in parallel system. If so, power on these UPS and check if the
Parallel comm. fail
alarm disappears.
2. Press the FAULT CLEAR button
Battery fault
Battery is depleted (reserved)
Battery replaced
Battery test failure, and the battery should be replaced
Before the end of the discharge, battery undervoltage pre-warning may occur. After this pre-warning, the
Battery
low
battery should have the capacity for 3 minutes discharging with full load. The time is user-configured ranging
pre-warning
from 3 minutes to 60 minutes. Shut down the load in time
Battery stop discharge
Inverter is off due to the battery end voltage. Check the mains failure and try to recover it
Mains voltage exceeds the upper or lower limit and results in rectifier shutdown. Check the input phase voltage
Mains volt. abnormal
of the rectifier
Mains undervoltage
Mains is undervoltage, reduce load to keep running. Check the input line voltage
Mains freq. abnormal
Mains frequency is out of the limit range and results in rectifier shutdown. Check the input frequency
Rectifier block
Rectifier failure. The rectifier shuts down and the battery discharges
The temperature of heat sink is too high to keep the rectifier running. The UPS can recover automatically. Check
Rectifier overtemp.
the environment and ventilation
Battery charger fault
Battery charger is over voltage
Control power 1 fail
UPS operates but the control power is not available
Mains phase reversed
AC input phase sequence is reversed
Rectifier overcurrent
Rectifier is over current
Soft start fail
Rectifier cannot start due to the DC bus low voltage
48
Table 5-7 Prompts and meanings
Inverter and bypass supplies are not synchronized, and the load transfer between the
bypass and inverter will cause a brief power supply interruption
The bypass is abnormal, inverter shutdown will cause the load power-off
The number of paralleled inverters already turned on is insufficient to carry the current
load, thus more inverters are required
The battery maintenance test discharges the battery completely. A prompt screen will
appear to require your confirmation. Cancelling the test will end the battery discharge
and return to the Normal mode
No operation is required
Check the current alarm message
Control password is required for battery test or UPS test
Battery test condition is not met. Please check whether the battery is in boost charge
state and the load level is more than 20%
The prompt appears when you select the forcing charge command while the forcing
charge condition is not met (such as no battery, charger failure)
After the menu '3 Phase Output or 1 Phase Output' is set, you can power off the system
completely, and then power on the system again after the wiring is changed according
to the settings
Table 5-8 UPS alarm message list
Meaning
Description
User Manual 10H52188UM60 - Rev. 2 - 09/2012
Liebert NXC
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