50 Chapter 7 Maintenance And Troubleshooting
Liebert
®
ITA 10kVA UPS User Manual
No.
Fault
Cause Analysis
Disposal Method
16
The fault indicator is on, the
buzzer beeps for a long time,
indicator 1 of the load indicator
is normally on, and indicator 2
of the load indicator blinks
Parallel current sharing
fault
1. Open the upstream switch of the UPS mains and
upstream MCB of the battery;
2. Check that whether the metal enclosure of the power
cabinet is reliably connected to the Bat_PE of the UPS,
and the wiring of the battery cables should be laid side
by side and be the same direction
17
The fault indicator is on, the
buzzer beeps for a long time,
and the LED displays
RECTIFIER FAULT, DC BUS
ABNORMAL
Overload
Remove some loads, and restart the UPS after about 5
minutes
UPS internal fault
Turn off the UPS, cut off the input power and contact the
dealer
If you need to report the UPS fault to Emerson or the dealer, please record and inform the UPS model and code (the
bar code on the back of the UPS chassis). If the UPS is a long back-up UPS, you should also provide the battery
configuration information.
