MITSUBISHI ELECTRIC 9700 Series - Manual (Page 55)

MITSUBISHI
ELECTRIC 9700 SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
3-25
MITSUBISHI ELECTRIC 9700 SERIES UPS
B) UPS Shutdown Procedure
1. If a total UPS shutdown is required, verify that the critical load is OFF.
2. Select "STOP MENU" from the Operations menu.
3. Press the "INVERTER STOP" key in the START/STOP menu on the LCD panel.
The UPS will transfer the load to the static bypass line.
4. When the "LOCAL" is displayed on the LCD panel, the operation can be performed at
the UPS front panel. When the "REMOTE is displayed on the LCD pane, the
Inverter can be stopped by remote operation only. If the inverter stop operation is
required locally (at the UPS), select to "LOCAL" from the "Remote/Local" selection
in the Operations menu. Select “Local” mode.
5. Generally, the Inverter alone will be stopped and the Converter will remain energized
to float-charge the batteries.
6. If stopping the Converter is required, The operation instruction “TURN OFF CB2” will
be displayed on the LCD panel.
7. Open the Battery Disconnect circuit breaker (CB2) manually. The operation
instruction “TURN OFF CB101” will be displayed on the LCD panel.
WARNING : Verify the load is OFF if the next step is to be performed .
8. Open the control circuit breaker (CB101).
9. Open the AC Input circuit contactor (CB1) automatically.
NOTE : Power to the critical load is supplied through the static bypass line. Power
to the critical will be lost after execution of the next step. The load will drop .
10. If turning off all power to critical load is desired, open the Bypass input Circuit
Breaker(MCCB inside the user ’s cabinet) manually.
11. Contactor CB3 will open automatically.
CAUTION : All UPS power terminals are still live. Lethal voltages present.
De-energize all external sources of AC and DC voltages before handling UPS .