Mitsubishi Electric 9900CX SERIES Owner Technical Manual page 47

B) Stop Operation
If a total UPS shutdown is required, verify that the critical load is OFF.
a.) On the LCD panel, select "OPERATION" tab, and then press the "STOP OPERATION"
icon to proceed UPS shutdown. (Refer to Figure 2.3)
b.) Follow the "STOP OPERATION" guidance accordingly. During the procedure, UPS will
transfer the power feeding from the Inverter supply to the Bypass line supply.
c.) Both Converter and Inverter will remain energized until complete disconnection from all
power sources.
NOTE : When "REMOTE OPERATION MODE" is displayed on the LCD panel, the
inverter start operation can only be performed remotely. If local inverter
stop operation is required (at the UPS), select "LOCAL ONLY" or
"REMOTE & LOCAL" in the OPERATION MENU.
d.) Open the Battery Disconnect circuit breaker(user supplied) manually.
WARNING : Verify the load is OFF if the next step is to be performed .
NOTE :
e.) If a dual source is feeding the UPS, open the External AC Input Circuit Breaker (user
supplied) manually.
f.) If turning off all power to the critical load is desired, open the External Bypass Input
Circuit Breaker (user supplied) manually.
CAUTION : In bypass mode, all UPS power terminals are still live. Lethal voltages
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Power to the critical load is supplied through the bypass line.
Power to the critical load will be lost after execution of the next step.
The load will drop.
are present. De-energize all external sources of AC and DC power.
Before removing the covers, wait 5 minutes after de-energizing.
Check no-voltage before handling UPS. Be careful for the devices
even when the UPS has been de-energized, still internal devices may
be hot.
MITSUBISHI ELECTRIC 9900CX SERIES UPS
Page Number:
3-9