8 Troubleshooting
BU5002R/BU3002R/BU3002RH
123
8
8 Troubleshooting
Perform the checks shown below if the unit is operating abnormally.
If the issue is still not resolved, contact the shop of purchase.
To stop the buzzer sound, press “ESC” for 0.5 seconds or longer.
Problem
Buzzer Output Charge
Message
displayed on
LCD (Note 2)
Cause
Action
Buzzer
sounds
intermittently
4-second
intermitte
nt sound
ON
OFF/Dis
chargin
g
Battery mode
The UPS is in backup
operation due to a power
outage or AC input error.
Output stops if backup
operation is continued.
Stop the connected devices in use
by shutting them down (end
processing).
4-second
intermitte
nt sound
ON
ON
Fault-E12
Battery
OverTemp
An abnormal battery
temperature was
detected during normal
operation. The UPS
switches to bypass
operation.
Wait until the battery temperature
drops. When it returns to the
normal temperature, the UPS will
return to the normal operation
state. If it does not recover, the
UPS is faulty, so contact
the shop
of purchase.
2-second
intermitte
nt sound
ON
ON
Fault-E10
Battery weak
End of bat.life
No battery
Either battery
degradation, end of
battery life, or battery
disconnection have been
detected.
If “Connect Battery” is displayed at
the bottom of the LCD, check
whether the battery is properly
connected. If the displayed
message is different, replace the
battery. If an optional replacement
battery is purchased, the customer
can carry out the replacement
operation.
2-second
intermitte
nt sound
ON
ON
Fault-E13
End of UPS life
It has been detected that
the life of the product has
expired.
Replace the UPS.
1-second
intermitte
nt sound
ON
OFF/Dis
chargin
g
Battery low
The UPS is in backup
operation due to a power
outage or AC input error.
The residual battery
capacity is low, so output
will stop soon.
Stop the connected devices in use
by shutting them down (end
processing).
0.5-seco
nd
intermitte
nt sound
ON
Undefin
ed (note
3)
Fault-E8
Internal fan fail
There is a fault on the
internal cooling fan, so
the UPS switches to
bypass operation. (note
1)
If the rear fan is not rotating,
replace the fan. If the front fan is
not rotating, the UPS is faulty.
Contact the shop of purchase.
0.5-seco
nd
intermitte
nt sound
ON
ON/Disc
harging
Fault-E9
Reduce output
load
The load of the
connected devices is too
high and is exceeding
the rated capacity. If this
status continues, the
UPS switches to bypass
operation (Note 1)
Reduce connected devices until the
alarm stops.
0.5-seco
nd
intermitte
nt sound
ON
ON/Disc
harging
Fault-E17
Charger fail
A failure occurred on the
battery charging system.
Turn ON only the power switch
again. If the displayed content does
not change, the UPS is faulty.
Contact the shop of purchase.
0.5-seco
nd
intermitte
nt sound
ON
ON/Disc
harging
Fault-E20
A breakdown of an
internal component or
internal circuit has been
detected.
Operation continues but the UPS is
faulty. Contact the shop of
purchase.
