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12. Troubleshooting
If a problem occurs, check the condition of the equipment and perform countermeasures as
listed in the table below.
CAUTION
！
・
Internal maintenance and inspection should be performed only by
technically qualified personnel. Electric shock, injury, burning, fuming or
fire could otherwise result.
・
Before beginning inspection, shut down the UPS completely, and remove
the input power. Failure to do so may result in an electric shock.
・
While the batteries are connected to the equipment, hazardous voltage is
present. Never touch any parts with your hand. Doing so may result in an
electric shock.
Condition
Countermeasure
No power supplied to
output.
・
Check whether the input wiring has been performed correctly. Refer to §7
“Wiring”.
・
Verify that the input voltage and input frequency are within the rated
range. Refer to §15.4 “Specifications”.
・
Check that MAIN MCCB is set to “ON”.
・
must be pressed for at least 1 second.
See §9.1 “UPS Startup (Normal Operation)” for the correct startup
procedure.
・
The bypass breaker may be tripped. See §11.7 “Bypass Breaker Reset”.
Output does not stop.
・
must be pressed for at least 1 second.
See §9.4 “UPS Shutdown (Daily)” for the correct shutdown procedure.
However, bypass power supply continues if bypass operation was started
by changing over with the forced bypass switch, overload, or failure.
・
Check the setting of item
⑪
“Inverter stop operation” in §10.1 “Setup
Menu Item List”. It may be set to “Bypass”. The factory default setting is
“OFF”.
・
Check the setting of item
⑨
“
switch response time” in §10.1
“Setup Menu Item List” . It may be set to “3 seconds” or “Special
operation”. The factory default setting is “1 second”.
Output stops during
operation
・
Check whether the bypass breaker on the back panel is tripped. It may
have been tripped by an overload or short circuit.
Check the total load and the possibility of a short circuit.
When the total load is high, reduce the number of load devices connected
to the UPS.
See §11.7 “Bypass Breaker Reset”.
Output stops during a
power failure.
・
Check whether the batteries have reached their replacement interval.
The battery service life will differ depending on the ambient
temperature.
Replacing the batteries early is recommended.
Alarm buzzer sounds.
・
The alarm buzzer sounds when an error, abnormal state, or alarm
condition is detected in the UPS. See §13 “Alarm Sounds”.
Alarm buzzer does not
sound.
・
The alarm buzzer sound may be set to “OFF”.
Check the setting of item
⑧
“Buzzer sound” in §10.1 “Setup Menu Item
List”.
Red ALARM LED is lit.
・
A non-fatal alarm condition or error has occurred.
Contact your supplier.
