8 Troubleshooting
BU5002R/BU3002R/BU3002RH
126
Problem
Buzzer Output Charge
Message
displayed on
LCD (note 2)
Cause
Action
The
connected
devices stop
during a
power
outage
2-second
intermitte
nt sound
ON
ON
Fault-E10
(battery
replacement
LED lit)
Battery degradation was
detected.
Replace the battery. If an optional
replacement battery is purchased,
the customer can carry out the
replacement operation.
An error
occurs during
power
recovery
after a power
outage
4-second
intermitte
nt sound
ON
OFF
Fault-E12
Battery
OverTemp
A battery temperature
fault is detected.
Wait until the battery temperature
drops.
The sound of
the fan has
become
noisy
(rotation
speed has
increased)
None
Undefi
ned
(note
3)
Undefin
ed (note
3)
Undefined (note
3)
The fan operates in
high-speed mode under
the following
circumstances.
1) During backup mode
2) When the connected
load is large during
normal operation
Check if rotation of the fan is
obstructed. Wait until the conditions
for high-speed mode have
resolved.
Note 1: In bypass operation, the commercial power supply is directly output. If it is not possible to
change to bypass operation, or if a power outage has occurred in bypass operation (AC input
OFF), output will stop.
Note 2: A maximum of 2 types of message may be displayed alternately on the LCD.
Note 3: The output varies depending on the circumstances (charging, LCD display message).
