Chapter 3 Operation And Display Panel 29
Liebert ITA 16kVA/20kVA User Manual
3.4 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 3-7.
Table 3-7 Prompts and meanings
Prompt Meaning
Transfer with interrupt between bypass and
inverter, confirm or cancel it when powering
off for a while
Inverter and Bypass supplies are not synchronized and any load transfer between
the supplies will cause a brief load interruption
This operation leads to output shutdown,
confirm or cancel it
The bypass is in abnormal state, inverter shut down will cause the load power-off
Turn on more UPS to carry current load
The number of paralleled inverters already turned on is insufficient to carry the
existing load
Battery will be depleted, confirm or cancel
Battery maintenance test discharges the battery 100%. This prompt apears to
require your confirmation. Cancelling the test will ends the test and transfers the
UPS to Normal mode
System self-test is finished, everything is ok
No action required
System self-test is finished, please check
the current warnings
Check the current alarm message
Enter control password
Required for battery or UPS test
Battery self-test condition is low, please
check battery state and loadlevel
Battery test condition is not met. Please check whether the battery is in boost
charge state and the load level is over 20%
Forcing charge condition is low, please
check battery state
This prompt appears when you select the forcing charge command while the
forcing charge condition is not met (such as no battery, charger failure)
Check the connection according to the
settings, power-off takes effect, 3-phase
(1-phase) output
After setting the menu option ‘3-in 3-out/3-in 1-out’, you can power off the system
completely, and then power on again after the wiring is changed according to the
settings
3.5 UPS Alarm Message List
The following list gives the UPS alarm message list based on the ‘Current records’ and ‘Historical records’ menus in
Table 3-8.
Table 3-8 UPS alarm message list
Alarm message
Description
Inverter comm. fail
Internal communication failure between the monitoring board and inverter
Rectifier comm. fail
Internal communication failure between the monitoring board and rectifier
Parallel comm. fail
The CAN communication between different UPSs within a parallel system fails. 1.Check if there are
some UPSs not powered on in the parallel system. If so, power on these UPSs and check if the alarm
disappears. 2. Press the FAULT CLEAR button
Battery fault
Battery detected faulty (Reserved)
Battery replaced
Battery test failed, Battery should be replaced
Battery low
pre-warning
Before the end of discharge, battery undervoltage pre-warning should occur. After this pre-warning,
battery should have the capacity for 3 minutes discharging with full load. The time is user-configured
from 3 minutes to 60 minutes. Shut down the load in time
Battery stop
discharge
Inverter turned off due to low battery voltage. Check the utility failure and try to recover it
Mains volt. abnormal
Mains Voltage exceeds the upper or lower limit and results in rectifier shutdown. Check the input
line-to-neutral voltage amplitude of rectifier
Mains undervoltage
Mains voltage is undervoltage. Derate for running and check the input line voltage
Mains freq. abnormal
Mains frequency is out of limit range and results in rectifier shutdown. Check the input frequency
Rectifier block
Rectifier detected faulty. Rectifier shuts down. Battery discharges
Rectifier overtemp.
The temperature of heat sink is too high to keep the rectifier running. The UPS can recover
automatically. Check the environment and ventilation
Battery charger fault
Battery charger is over voltage
Control power 1 fail
UPS operates but Control Power is not available
Mains phase reversed
Rectifier AC input phase sequence is reversed
