70 G8000 Series Installation and Operation Manual
14.9 Emergency Power Off (EPO)
Press the EPO switch for immediate shutdown of all power through the UPS. The signal from the EPO
is processed as a “hard fault” by the UPS and results in gate-blocks on the transistors and opens all the
internal contactors.
To Reset the UPS after triggering the EPO, do the following:
1. Shut Down the UPS as described in section 14.6.
2. Restart the UPS as described in section 14.3.
15 Troubleshooting
When an error occurs in the UPS, error data is displayed on the LCD screen. This section will describe the
types of errors, the error messages displayed on the LCD screen and the procedures to correct the errors.
15.1 Types of Errors
The following types of errors may occur in the UPS:
TABLE 15.1 OPERATION TYPES
Name Description
Fault Fault (Trip) The UPS has been tripped and has stopped operating.
The UPS is in Bypass mode.
Warning
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.
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.
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.