Omron BN50T Instruction Manual page 93

Problem Beep
· The UPS None
power
does not turn
on
· The UPS
does not
output power
to the
secondary
(connected
None
devices) side
· Power switch
does
not work
None
·Backup is not
possible
·Connected
devices stop
Intermittence
when a power
of 2 s
failure occurs
The fan makes None
loud noises
(The fan
rotates faster)
·The UPS None
makes click
noises
·The UPS
makes click
noises even
though there
is no power
failure
Note 1: In bypass operation, commercial power is output directly.
Output stops when a power failure (AC input OFF) occurs in bypass operation.
If 100% of rated capacity is exceeded under commercial operations,
the bypass operation starts in 5 minutes. If 115% is exceeded, the operation
immediately stops. If 105% of rated capacity is exceeded under backup operations,
the output stops in 30 seconds. If 125% is exceeded, the output immediately stops.
Note 2: Maximum 2-types message may be displayed by turns on the LCD.
BN50T/BN75T/BN100T/BN150T/BN220T/BN300T
Output Charging Message on
LCD Display
(Note 2)
OFF ON AC I/P
abnormal-VH
AC I/P
abnormal-VL
AC I/P
abnormal-FH
AC I/P
abnormal-FL
OFF ON Standby by
Remote OFF
ON ON Battery empty The battery charge
ON ON Battery weak
("Battery
replacement"
LED is lit.)
Battery life
--- ---
ON ON AVR mode
8 Troubleshooting
Cause
AC input voltage Check the voltage and
or AC input frequency of the input power
supply.
frequency are too
low or too high.
Remote ON/OFF Refer to "6. Using the contact
Signal is ON, or signal functions".
the "Remote ON/
OFF Logic" is set
to "OFF at Open"
in the menu on the
LCD.
Connect the UPS to a
is insufficient. commercial power and charge
the battery for at least 4 hours.
The battery test Hold down the [ESC] switch
detected a weak at least 0.5 seconds until the
battery. beeper stops. Replace the
battery. You can replace the
weak battery with a separately
purchased replacement
battery as needed.
Reset the battery life counter
after replacing the battery.
--- The fan operates Wait until all the High-speed
Mode conditions be non-
in High-speed
Mode under effective.
the following
conditions:
1) during the
Battery Mode
2) during AVR
(automatic voltage
regulation)
operation
3) during charging
the battery (when
the battery level is
0 to 95%)
Variations Check the installation
(decrease) in conditions of the UPS with the
the input power following points:
occur frequent- ·if the UPS is connected to the
ly. Or, noise thin extension cables,
may be included ·if the UPS is connected to
that significantly the same commercial power
supply with a large power-
distorts the voltage
waveform of the consuming device, and other
input power. points.
Solution
8-3
8