Njoy Balder 1500, User Manual

Page: 17 / 37

32 33
Troubleshooting 7
Problem Possible Cause Solutions
No indication and alarm
even though the main is
normal.
The AC input
power is not
connected well.
Check if input
power cord is
firmly connected
to the mains.
The AC input is
connected to the
UPS output.
Plug the AC input
power cord to the
AC input correctly.
The icon and the
warning code
EP
are
flashing on LCD display
and alarm is sounding
every second.
EPO function is
activated.
Set the circuit in
closed position
to disable EPO
function.
The icon and the
warning code
SF
are
flashing on LCD display.
Alarm is sounding every 2
seconds.
Line and neutral
conductors of
UPS input are
reversed.
Rotate mains
power socket by
180˚ and then
connect to UPS
system.
The icon and and
warning code
NC
are
flashing on LCD display.
Alarm is sounding every 2
seconds.
The external or
internal battery
is incorrectly
connected.
Check if all
batteries are
connected well.
Fault code is shown as 27
on LCD display and alarm
is continuously sounding.
Battery voltage
is too high or the
charger is fault.
Contact service
unit.
Problem Possible Cause Solutions
Fault code is shown as 28
on LCD display and alarm
is continuously sounding.
Battery voltage
is too low or the
charger is fault.
Contact service
unit.
The icon and
the warning code
OL
are
flashing on LCD display.
Alarm is sounding every
second.
UPS is
overloaded.
Remove excess
loads from UPS
output.
UPS is
overloaded.
Devices
connected to
the UPS are fed
directly by the
electrical network
via the Bypass.
After repetitive
overloads, the
UPS is locked
in the Bypass
mode. Connected
devices are fed
directly by the
mains.
Remove excess
loads from UPS
output first. Then
shut down the
UPS and restart it.
Fault code is shown as 49
on LCD display and alarm
is continuously sounding.
UPS is over input
current.
Remove excess
loads from UPS
output.
Fault code is shown as 43
and the icon is lighting
on LCD display. Alarm is
continuously sounding.
The UPS
shut down
automatically
because of
overload at the
UPS output.
Remove excess
loads from UPS
output and restart
it.
Fault code is shown as 14
on LCD display and alarm
is continuously sounding.
The UPS
shut down
automatically
because short
circuit occurs on
the UPS output.
Check output
wiring and if
connected devices
are in short circuit
status.
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