Troubleshooting - PROLiNK Master II Series User Manual

4. TROUBLESHOOTING

If the UPS system does not operate correctly, please solve the problem by using the table
below.
Symptom
No indication and alarm even
though the mains is normal.
The icon and the warning
code flash on LCD display
and alarm is sounding every 2
seconds.
The icons of
warning code
display. Alarm is sounding every 2
seconds.
Fault code is shown as 27 on LCD
display and alarm is continuously
sounding.
Fault code is shown as 28 on LCD
display and alarm is continuously
sounding.
The icons ,
warning code
display. Alarm is sounding every
second.
Fault code is shown as 43 and the icon
is lighting on LCD
display. Alarm is continuously
sounding.
, and the
flash on LCD
and the
flash on LCD
Possible cause
The AC input power is not
connected well.
The AC input is connected to the
UPS output.
EPO function is activated.
The external or internal battery
is incorrectly connected.
Battery voltage is too high or
the charger is fault.
Battery voltage is too low or
the charger is fault.
UPS is overload
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.
The UPS shut down
automatically because of
overload at the UPS output.
21
Remedy
Check if input power cord
firmly connected to the mains.
Plug AC input power cord to
AC input correctly.
Be sure that the EPO terminal
is connected securely.
Check if all batteries are
connected well.
Contact your dealer.
Contact your dealer.
Remove excess loads from UPS
output.
Remove excess loads from UPS
output.
Remove excess loads from UPS
output first. Then shut down the
UPS and restart it.
Remove excess loads from UPS
output and restart it.