Remote Power Off/Emergency Power Off - ONEAC SE041XAT User Instruction Manual

Remote Power Off/
Emergency Power
Off
ONEAC Sinergy SE II Series UPS User Manual
0.0.1 (RPO)/(EPO)
The Remote Power Off (RPO) / Emergency Power Off (EPO) circuit enables the operator to disconnect
the UPS from the load either remotely or during an emergency situation. The external connection to the
RPO circuit is located next to the 9-pin SUB-D (interface com 3) connector on the back panel of the unit.
If the circuit between the two RPO connector pins is "opened," the output of the UPS is immediately
switched off and the unit is immediately put into a FAULT mode.
CAUTION: The Mains/Bypass input to the UPS and the battery string are still energized.
To restart the UPS, the following procedure must be followed:
1. When the RPO circuit is "opened", the UPS will immediately terminate power output to the load. At
the same time the fault alarm "RPO Activated" (Fault 11) on page 22 will be triggered, the audible
alarm will be activated, the FAULT light on the Control Panel will be illuminated, and the display
will scroll the following messages: EPO ACTIVATED / FAULT MODE / NO OUTPUT. The unit
will remain in this state until the operator terminates the fault mode.
2. To terminate the FAULT MODE and shut down the UPS the operator must follow the following two
steps:
The operator must switch both the mains and bypass breakers, located on the right side of the rear
panel, to the "OFF" or down position. Note: At this time an additional message, UTILITY FAILURE,
will be added to the scrolling display. This confirms that the commercial power is off.
The operator should then go to the LCD panel on the front of the unit and press the MENU Button
(OK) to exit the FAULT MESSAGE display and go to the CONTROL menu. Press the MENU (OK)
button again to access the screen that displays TURN UPS ON/OFF and RESET FAULT. Press the
down arrow (button) to select RESET FAULT, Press MENU (OK) twice and the unit will display a
SHUT DOWN PENDING message and then shut down within 5 seconds.
3. Once the unit is completely shut down it should not be restarted until the RPO/EMO event has been
corrected. Once the RPO/EMO switch has been reset to its service mode the UPS may be restarted.
4. To restart the UPS, the operator should first switch bypass breaker and then the mains breaker, located
on the right side of the rear panel, to the "ON" or up position. The UPS will automatically restart and
begin a system self check routine and then power up in the BYPASS mode. After approximately
15-20 seconds the unit will return to the state it was in prior to the fault condition.
NOTE: Switching the mains on first may result in a Fault Message.
NOTE: The system default is to return to the mode it was operating in prior to the RPO/EPO event. This
will typically be the ONLINE mode.
NOTE: If during previous operation of the UPS, a state other than ONLINE mode was selected, the
operator will need to intervene to return the UPS to the ONLINE mode.
The RPO circuit may be physically extended by connecting normally closed switches in series between
the RPO connector pins. Activating (opening) any of the series switches will cause the UPS to shut off its
output.
UPS Start-Up & Shut Down
25