Omron BU1002SW, BU3002SW specifications Troubleshooting, Problem Check and remedy

10. Troubleshooting

10. Troubleshooting

Perform the checks shown below if the unit is operating abnormally.

If the unit continues to operate abnormally, please contact our peripheral device customer support center at

_____.

Problem	Check and remedy
UPS does not operate.	1. Check that the AC Input Plug is connected to the commercial power securely.
The LED display does not	2. The AC Input Overcurrent Protection is working.
light up, even though the AC	(If the black button has popped up, there are probably too many connected devices or
input plug is connected to a	there is a short in the connected devices.) Disconnect all of the connected devices,
wall outlet (commercial	push in the the black AC input overcurrent protection button and turn ON the Power
power) and the power switch	Switch of the UPS again. If the status indicator does not display normally, there is a
is ON.	problem with the UPS. (See "Interpreting beeps and displays" on page 39.)
Backup is not possible.	Is charging insufficient?
The computer stops when a Perform the test after charging the battery for at least 8 hours. (When an additional battery
power failure occurs.	is connected, the charging time is 24 hours.)
	(You can charge the battery by connecting the AC input plug of the UPS to a wall outlet
	(commercial power).)
Backup is performed too	Variations (decrease) in the input power occur frequently. Or, noise is included that
frequently.	significantly distorts the voltage waveform of the input power.
Frequent switching is	● Change the wall outlet (commercial power) to which you connect the UPS. Try connecting
performed although a power	to a wall outlet (commercial power) away from equipment that consumes large power.
failure does not occur.	● This problem may occur also when you connect many devices to a plug strip or extension
You hear the sound of	cord connected to the UPS if it is a long or thin cable.
switching.
Does not turn ON when	The unit does not start up when the input power supply voltage/frequency is abnormal.
power switch is pressed.	(The status indicator displays “H-”, “-H”, “L-” or “-L”.) Check the voltage and frequency of
	the input power supply.
	See also A. Specifications Input Allowable voltage range, frequency see Page 88
The display is abnormal.	The probable cause is noise that occurs inside the UPS.

●The display is unstable. ● Ground all devices connected to the UPS. Connect them to a wall outlet (commercial

● White lines occur.	power) for 3-pin plugs or connect their Grounding Terminal to the Grounding Terminal of
● Noise increases.	a wall outlet.
	● This problem may occur when power cords are long or placed closely or when the UPS
	and devices to be backed up are placed closely. Rearrange them.
	● If the UPS or devices connected to the UPS are contained in a metal rack, attempt to
	ground the rack itself.
The battery replacement	1) The auto battery test or self-diagnostic test determined that the battery is dead.
lamp blinks and the beeper	2) Did the overcurrent protection switch on the rear panel of the additional battery unit get
sounds at 2-second
	turned OFF when connecting an additional battery unit?
intervals.
	If it is not ON, the auto battery test may falsely detect a deteriorated battery.
The status indicator shows	There are too many connected devices. Reduce the number of connected devices until
“ ”, and the beeper sounds
	“ ” is displayed on the status indicator.
at 0.5-second intervals.
The status indicator blinks	The UPS stopped because too many devices were connected for 3 minutes or more, or
“ ”, and the beeper
	because 120% was exceeded.
sounds continuously.
	Turn OFF all power to the unit and connected devices, and reduce the number of connected
	devices. Then, turn the power to the unit and connected devices back ON and check
	whether " " is displayed on the status indicator.

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