3-7. Fault codes
4. Troubleshooting guide
Fault event
Fault
code
Fault
code
Icon
Fault event
01
02
03
04
11
12
13
14
27
28
41
43
Low inverter voltage
Inverter output is short circuited
Battery voltage too high
Battery voltage too low
Excessive temperature
Overload
Bus start failure
Bus over
Bus under
Bus unbalance
Inverter soft start failure
High inverter voltage
3-8. Warning indicators
Low battery
Overload
Battery is not connected
Overcharge
Beeps once every second
Beeps once every second
Beeps once every second
Over temperature
Charger failure
Battery fault
Beeps once every second
Beeps twice every second
Beeps once every second
Beeps once every second
Warning
Icon (flashing)
Alarm
Beeps once every second
Beeps once every second
Out of bypass voltage range
Unstable bypass frequency
Beeps once every second
EEPROM error
If the UPS system does not operate correctly, use the table below to troubleshoot the problem.
Even though the mains supply
is normal, there are no status
indicators or alarms.
The and icons become
illuminated on the LCD display
and the alarm starts beeping
once every second.
Fault code 27 and the
become illuminated on the LCD
display, and the alarm starts
beeping continuously.
The AC input is connected
to the UPS outlet.
The AC input cable is not
properly connected.
The external or internal
battery connection
is incorrect.
Battery voltage is too low
or the charger fails
Battery voltage is too high
or the charger fails
Check if all batteries are
properly connected.
Contact your dealer or service center
Please contact the dealer
or service center
Check to make sure the power cord is
firmly connected to a AC wall socket
Plug the power cord to a wall socket.
Symptom
Possible cause
Solution
Fault code 28 and the
icon become illuminated on the
LCD display, and the alarm starts
beeping continuously.
The and icons become
illuminated on the LCD display, and
the alarm starts beeping twice
every second
Fault code 43 becomes illuminated
along with the icon on the
LCD display, and the alarm starts
beeping continuously
UPS is overloaded
UPS is overloaded.
Devices connected to the
UPS are fed directly from
utility power via the Bypass
After repetitive overloads,
the UPS is locked in
Bypass mode. Connected
devices are fed directly
from utility power.
The UPS shuts down
automatically upon
detecting the overload
condition in the output
Remove excess loads from the
UPS output
Remove excess loads from UPS output
Remove excess loads from the UPS
output first. Shut down the UPS
completely before restarting the unit
once again
Remove excess loads from the UPS
output and restart the unit once again
Fault code 14 becomes illuminated
and the alarm starts beeping
continuously.
The UPS shuts down
automatically upon
detecting the overload
condition in the output
Battery backup time is shorter
than its nominal value.
Defective batteries
Batteries are not fully
charged.
Charge the batteries for at least
5 hours and then check their
capacity. If the problem persists,
consult your dealer.
Contact your dealer for
a replacement
Check the output wiring and if
connected devices are
short-circuited.
Fault codes 1, 2, 3, 4, 11, 12, 13
and 41 become illuminated on the
LCD display, and the alarm starts
beeping continuously.
A UPS internal fault has
occurred. There are two
possible causes:
1. Power is continued to
be supplied to the load,
but is done directly from
the AC grid via a bypass.
2. Power is no longer
supplied to the load
Please contact the dealer or
service center.
≥0.99 at 100% load
≤15% at 100% load THDU <1.6%
≥88%
≥83%
≤3% THD (linear load) / ≤6% THD (non-linear load)
<1000m
<50dB at 1 meter
