47
Perform the checks shown below if the unit is operating abnormally.
If the unit continues to operate abnormally, please contact our Electronic Systems & Equipments
customer support center at _____.
Troubleshooting
9
Problem
Check and remedy
The LCD does not appear when
the UPS is connected to com-
mercial power and the power
switch is turned ON.
1. Make sure the AC input is securely connected to commercial power.
2. AC input overcurrent protection is activated and power is cut. (For BU2002R-
WL and BU3002RWL, the black button has popped up. For BU5002RWL, it
is tilted towards OFF.)
• If the black INPUT PROTECTION button pops up, there are too many con-
nected devices or there was a short-circuit with the connected devices.
Disconnect all the connected devices, press the black INPUT PROTEC-
TION switch (overcurrent protection switch), and turn on the power switch.
• If the status indicator does not display properly after you perform the above
operation, there is a problem with the unit.
(See “3-3 Interpreting beeps and displays” on page 29.)
Backup is not possible.
The computer stops when a
power failure occurs.
The battery may not be fully charged.
Perform the test after charging the battery for at least 8 hours.
The battery can be charged just by connecting to a wall outlet. The “Power”
switch can be either ON or OFF.
Backup is performed too fre-
quently.
Frequent switching is performed
although a power failure does
not occur.
You hear the sound of switching.
Variations (decrease) in the input power occur frequently. Or, noise may be in-
cluded that significantly distorts the voltage waveform of the input power.
●
Try and check what happens when connecting the unit to a different wall out-
let (commercial power) located some distance away from the device consum-
ing a large amount of power.
●
This problem may occur also when you connect many devices to a plug strip
or extension cord connected to the UPS if it is a long or thin cable.
Does not turn ON when power
switch is pressed.
The unit does not start up when the input power supply voltage/frequency is
abnormal. (“AC I/P abnormal” is displayed on the LCD.) Check the voltage and
frequency of the input power supply.
See also
A. Specifications Input voltage range, Input frequency see Page 66
The display is abnormal.
●
The display is unstable.
●
White lines occur.
●
Noise increases.
The probable cause is noise that occurs inside the UPS.
●
Ground all devices connected to the UPS. Connect them to a wall outlet
(commercial power) for 3-pin plugs or connect their Grounding Terminal to the
Grounding Terminal of 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, at-
tempt to ground the rack itself.
The battery replacement lamp
lights up or blinks, and the beep-
er sounds at 2-second intervals.
●
When the battery replacement lamp blinks: Judged as battery deterioration
by self-diagnosis test. Replace the battery as only the short backup operation
time is available.
See also
4-2 Self-diagnosis test → page 30
●
When the battery replacement lamp is ON: Battery life counter went off-scale.
The life of the battery has expired. Replace the battery.
See also
4-3 Battery life counter function → page 31
“Overload” is displayed.
There are too many connected devices. Reduce the number of connected de-
vices until the error is resolved.
“Over load time out” is displayed. Output stopped due to exceeded connection capacity.
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 the error is resolved.
Summary of Contents for BU2002RWL
Page 60: ...10 48 Notes of Chinese 10 UPS UPS 1 FA OA Windows UPS...
Page 61: ...10 Notes of Chinese 49 2 FA OA 2...
Page 62: ...BU2002RWL BU3002RWL BU5002RWL 10 50 AC 50 60Hz AC AC AC AC...
Page 63: ...10 Notes of Chinese 51 5cm 10cm UPS UPS AC AC AC200V 240V AC200 240V...
Page 65: ...10 Notes of Chinese 53 AC UPS AC UPS...
Page 66: ...BU2002RWL BU3002RWL BU5002RWL 10 54 AC AC 50 60Hz 25 25 6 40 2 AC AC...
Page 67: ...10 Notes of Chinese 55 DC250V UPS 200V http www fa omron com cn Pb AC AC 50 60Hz...
