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9. Troubleshooting
When an error occurs on the UPS, error data is displayed on the LCD screen and the
waveform is saved. This section will describe the types of errors, the error messages
displayed on the LCD screen, the process of saving waveforms and the procedures used to
correct the errors.
9.1 Types of Errors
The following types of errors may occur on the UPS:
No. Name Description
1 Fault (Trip) The UPS has been tripped and has stopped operating.
2 Warning-1
(Converter stop/
Input power
error)
The converter has been stopped and power is being supplied
from the battery. When the warning has been corrected, power is
automatically supplied from AC input.
3 Warning-2
(Stop and
restart)
The unit changes to bypass power supply and the UPS stops
operating. When the warning has been corrected, the unit will
automatically be restarted and revert to UPS power supply.
4 Warning-3
(Operation
control)
An error or phenomenon related to an error occurred. Since this
problem does not directly affect operation, the system switches to
synchronized mode.
5 Warning-4
(guidance)
An error or indication of an error has occurred, but operation was
not affected.