Operating Mode Description LCD Display
ECO Mode When the input voltage is within voltage regulated
range, UPS will power the output directly from the
mains. ECO is an abbreviation of Efficiency Corrective
Optimizer. In this mode, when the battery is fully
charged, the fan will stop working to save energy
Buck Mode when
AC is normal
When the input voltage is higher than the voltage
regulation range but lower than high loss point, the
buck AVR will be activated
Boost mode when
AC is normal
When the input voltage is lower than the voltage
regulation range but higher than low loss point, the
boost AVR will be deactivated
Battery Mode When the input voltage is beyond the acceptable range
or power failure and alarm is sounding every 10 seconds,
UPS will backup power from battery
Standby Mode UPS is powered off and no output supply power, but can
still charge batteries
Fault Mode When a fault occurs, the ERROR icon and the fault code
will be displayed
2.6 Operating Mode Description
Fault Event Fault Code Icon
Bus start fail 01 x
Bus over 02 x
Bus Under 03 x
Inverter soft start fail 11 x
Inverter voltage high 12 x
Inverter voltage low 13 x
Fault Event Fault Code Icon
Inverter output short 14 x
Battery voltage too high 27 x
Battery voltage too low 28 x
Over temperature 41 x
Over load 43
Charger failure 13 x
2.7 Faults Reference Codes
Warning Icon (Flashing Code Alarm
Low battery Sounds every 2 seconds
Overload Sounds every second
Battery is not connected Sounds every 2 seconds
Over Charge
Sounds every 2 seconds
Site wiring fault Sounds every 2 seconds
2.8 Warning Indicator
Warning Icon (Flashing Code Alarm
EPO Enabled Sounds every 2 seconds
Over temperature Sounds every 2 seconds
Charger Failure Sounds every 2 seconds
Battery fault Sounds every 2 seconds
(UPS will turn off)
Battery replacement Sounds every 2 seconds
EEPROM error Sounds every 2 seconds
Note: “Site Wiring Fault”function can be enabled/disabled via software. Please check soft-
ware manual for the details.
Problems Cause Solution
No indication and alarm even though
the mains are normal
The AC input power is not
connected
Check if input power cord firmly connected to
the mains
The AC input is connected to the
UPS output Plug AC input power cord to AC input correctly
The icon and the warning code
flashing on LCD display and alarm
is sounding every 2 seconds
EPO function is activated Set the circuit in closed position to disable EPO
function.
The icon , and the warning
code flashing on LCD display and
alarm is sounding every 2 seconds
Line and neutral conductors of UPS
input are reversed
Rotate main power socket by 180° and then
connect to UPS system
The icon , and the warning
code flashing on LCD display and
alarm is sounding every 2 seconds
The external or internal battery is
incorrectly connected Check if all batteries are connected
Fault code is shown as 27 on LCD
display and alarm is continuously
sounding
Battery voltage is too high or the
charger is faulty Contact your dealer
Fault code is shown as 28 on LCD
display and alarm is continuously
sounding
Battery voltage is too low or the
charger is faulty Contact your dealer
The icon , and the warning
code flashing on LCD display and
alarm is sounding every second
UPS is overloaded Remove excess loads from UPS output and
restart
Fault code is show as 43 and the icon
is lit on LCD display. Alarm sounds
continuously
The UPS automatically shut down
due to an overload at the output
Remove excess loads from the UPS output and
restart
Fault code is shown as 14 and alarm
sounds continuously
The UPS automatically shut down
because of a short circuit on the UPS
Check output wiring and if connected devices
are in short circuit status
Fault code is shown as 01, 02, 03, 11,
12, 13 and 41 on LCD display and alarm
is continuously sounding
A UPS internal fault has occurred Contact your dealer
Battery backup time is shorter than
nominal value Batteries are not fully charged
Charge the batteries for at least 5 hours and
then check capacity. If the problem persists,
consult your dealer
Batteries are defective Contact your dealer to replace the batteries
Fault code is show as 45 on LCD display
and code is continuously sounding
The charger does not have output
and battery voltage is less than
10V/PC
Contact your dealer