Eaton 1000L, User Manual, Page: 10 / 18

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If the UPS system does not operate correctly, please attempt to solve the problem using the table
below.
Please have the following information at hand before calling the After-Sales Service Department:
1. Model number, serial number
2. Date on which the problem occurred
3. Detailed description of the problem
Problem Possible cause Remedy
No indication, no warning
tone even though system
is connected to mains
power supply
No input voltage
Check building wiring socket outlet,
check input cable
LINE LED blinks
Phase and neutral
conductor at input of UPS
system are reversed
Connect UPS system according to
chapter 4
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 and BYPASS LED
light up even though the
power supply is available
Inverter not switched on Press On button “ I ”
INVERTER LED lights
up, warning tone at
intervals (every 1 or 4
seconds)
Mains power supply has
failed
Not necessary, battery operation;
warning tone at intervals of 1 second
means battery is almost empty
FAULT LED lights,
warning tone once a
second
Overload
Reduce number of users at UPS
output
FAULT-LED lights up,
permanent warning tone
UPS-mistake Notify dealer !!
Emergency supply
period shorter than
nominal value
Batteries not fully charged /
batteries defective
Charge the batteries for at least 1 - 2
hours. Check capacity. If the problem
still persists, consult your dealer
5. TROUBLESHOOTING