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MITSUBISHI ELECTRIC 9800A SERIES UPS
Page Number:
3-25
MITSUBISHI
ELECTRIC
9800A SERIES UPS
OWNERS / TECHNICAL MANUAL
B) Shut-down Procedure
If a total UPS shutdown is required, verify that the critical load is OFF.
Shut-down of UPS-1
1. Press the "START/STOP MENU" from the Main Menu on the LCD.
Note: When "REMOTE OPERATION MODE" is displayed on the LCD panel, the
inverter stop operation can only be performed remotely. If local inverter stop operation is
required (at the UPS), select "LOCAL" in "Remote/Local" selection in setup page. Select
“LOCAL” mode for the purpose of this stop procedure.
2. Press both "STOP" keys simultaneously on the LCD.
3. In general, only the Inverter will be stopped and the Rectifier will remain energized to
charge the batteries.
Opening the user supplied External Input AC Circuit Breaker (if dual source
used), the External Bypass Input Circuit Breaker and the DC Disconnect Circuit
Breaker, CB2, will shut down the load.
4. If stopping both the Rectifier and Charger is required, open the Battery Disconnect
circuit breaker (CB2) manually.
5. If a dual source is feeding the UPS, open the External AC Rectifier Input Circuit
Breaker (user supplied) manually.
6. If turning off all power to the critical load is desired, open the External Bypass Input
Circuit Breaker (user supplied) manually.
Shut-down of next UPS
The next UPS can be shut down in the same way as UPS-1.
The parallel UPS system will be in bypass operation when all inverters stops.
FIGURE 3.5-b Shut-down Procedure
540V