8 Troubleshooting
BU5002R/BU3002R/BU3002RH
Message
displayed on
LCD (Note 2)
• The UPS
power
does not
turn ON.
• There is no
power
output to
the
secondary
side
(connected
devices
side)
• There is no
response
when the
power
switch is
pressed
The AC power supply is
not input to the UPS.
Check if there is any problem on
the power supply to which the AC
input cable is connected.
When the “AC input
overcurrent protection” is
activated, the connected
devices may be too
many, or a short circuit is
occurring on the
connected devices side.
Disconnect all the connected
devices, separate the input power
supply, turn ON the circuit breaker,
reconnect the input power supply,
and turn ON the power switch of
the UPS again. If the normal "status
display" does not appear even if
doing the above, it is judged as a
failure. If the unit is in the normal
state, check the connected
devices.
Charging is insufficient,
so it is not possible to
start up.
Lower the value in [3.Settings] -
[Boot Settings] - [Reboot
Batt.level]. When set to 0%, the
battery charging level is not
included in the boot conditions, and
booting is immediate.
The input voltage or
frequency is low or high.
Check the voltage and frequency of
the input power from
[1.Measurements] - [Input/Output
Meter].
There is a short circuit on
the remote ON/OFF
terminal, or the LCD
menu “Remote ON/OFF
Logic” has been changed
to “OFF when opened”.
Charging is insufficient.
Connect the UPS to the
commercial power supply, and
charge the batteries for 8 hours or
more. If expansion battery units are
connected, more charging time is
required. (24 hours when 1
expansion unit is connected, 40
hours when 2 are connected, and
56 hours when 3 are connected)
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