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15. Troubleshooting
When an error occurs in 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 to correct the errors.
15.1 Types of Errors
The following types of errors may occur in the UPS:
No. Name Description
1 Fault (Trip) The UPS has been tripped and has stopped operating.
The UPS is on Bypass.
2 Warning-1
(Input power
failure)
Power is supplied from the battery. When the warning is corrected,
power will automatically be supplied from the AC input.
3 Warning-2
(Stop and
restart)
The UPS transfers to Bypass supply and the UPS stops operating.
When the warning is corrected, the UPS will automatically be
restarted and revert to UPS supply.
4 Warning
(Operation
control)
An error or a phenomena related to an error occurred. Since this
problem does not directly affect operation, the system switches to
synchronized mode.
(guidance) An error or indication of an error has occurred, but operation was
not affected.