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5. Troubleshooting
If the UPS system does not operate correctly, please attempt to solve
the problem using the table below.
Problem
Possible cause
Remedy
No input voltage
Check building wiring
socket outlet, check input
cable
No indication,
no warning tone
even
though system
is connected to
mains power
supply
I/P switch has been
disconnected
Set the I/P switch to „ON“
BATTERY-
LED blinks
Battery voltage
< 12VDC per unit.
When battery voltage >
12VDC per unit then clear
warning signal.
LINE-LED
blinks and
BATTERY-
LED lights up
Input power and/or
frequency are out of
tolerance
Check input power source
and inform dealer if
necessary
LINE-LED and
BYPASS-LED
light up even
though the
power supply is
available
Inverter not switched
on
Press On button “I”