
Chapter 7 Maintenance And Troubleshooting 47
Liebert
®
ITA 5kVA And 6kVA UPS User Manual
No.
Fault
Possible cause
Action to take
External battery cables
improperly connected
Check that the external battery cables are properly
connected
External battery reversely
connected
Check that the external battery cables are not reversely
connected
the LED displays BATTERY
FAIL
Battery damaged
Contact the local service center of Emerson to replace the
battery
8
The FAULT indicator in on, and
the LED displays CHARGER
FAIL
Charger failed
Contact the local service center of Emerson to replace or
repair the charger
Battery not fully charged
When the mains is normal, charge the battery for more than
eight hours, and then test the battery discharge time
9
Battery discharge time is
shorter than the standard time
obviously
Battery capacity depleted
Contact the local service center of Emerson to replace the
battery
10
The buzzer beeps, the FAULT
indicator is on, and the LED
displays TEMP OVER
UPS internal
overtemperature
1. Check that airflow blows out from the ventilation holes on
the rear panel.
2. Check that the clearances on both sides and at the back
of the UPS are greater than 200mm.
3. Check that the ventilation holes on the front panel, side
panels, base plate and rear panel of the UPS are
unobstructed.
4. Wait for ten minutes and restart the UPS
11
The buzzer beeps for a long
time, the FAULT indicator is
on, and the LED displays
OUTPUT SHORT
UPS output short circuit
Remove the load short circuit fault and restart the UPS
12
The buzzer beeps for a long
time, the FAULT indicator is
on, and the LED displays
RECTIFIER FAIL, INVERTER
FAIL, AUX SUPPLY FAIL, or
OUTPUT FAIL
UPS internal fault
The UPS needs repair. Seek technical assistance from the
local service center of Emerson
13
Abnormal noise or smell in
UPS
UPS internal fault
Turn off the UPS and cut off the power input immediately.
Seek technical assistance from the local service center of
Emerson
14
The UPS is about to turn off
due to battery capacity
shortage
Battery capacity low, UPS
turn-off imminent, and load
power lost imminent
1. Save the load data immediately and turn off the priority
load to avoid losing or damaging data.
2. Connect the UPS input terminal to standby AC power
15
The FAULT indicator is on and
the buzzer beeps for a long
time
Parallel address incorrect
1. Open the UPS mains switch.
2. Reset the parallel address
Overload
Remove some loads and restart the UPS in approximately
five minutes
16
The FAULT indicator is on, the
buzzer beeps for a long time,
and the LED displays
RECTIFIER FAIL, ABNOR
BUS VOLT
UPS internal fault
Turn off the UPS, cut off the input power and contact the
local service center of Emerson
When reporting UPS fault to Emerson or dealer, please inform the UPS model and machine number (the bar code on
the rear panel of the UPS). If the UPS is a long back-up UPS, you should also provide battery configuration
information.