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4.0 OPERATING PROCEDURES
For Parallel Operation system, refer to section "D) MMS Start-up Procedure".
(Parallel Operation system is herein after MMS [Multi Module System])
A)
Start Operation
Before the UPS startup, the internal Bypass line starts to supply the
unconditioned bypass input power to the critical load if the External input
(or Bypass) Circuit Breaker is closed. Be extremely careful with closing the
CAUTION
External input (or Bypass) Circuit Breaker.
a)
Verify that the External Bypass Input Circuit Breaker for each unit is closed (user supplied). If
a dual source is feeding the UPS, close the External AC Input Circuit Breaker (user supplied)
manually also.
b)
Close Battery Disconnect Circuit Breaker (user supplied).
c)
The LCD panel boots up automatically, and the screen will show that the Load is powered by
bypass line.
d)
On the LCD panel, press the "TRANSFER" button, and then press the "START INVERTER"
button to proceed UPS start-up. (Refer to Figure 2.3).
e)
Follow the "START INVERTER" guidance accordingly until the completion of the inverter
startup.
!
When "REMOTE OPERATION MODE" is displayed on the LCD panel, the
inverter start operation can only be performed remotely. If local inverter start
operation is required (at the UPS), select "LOCAL ONLY" or "REMOTE &
LOCAL" in the OPERATION MENU.
NOTE
B) Stop Operation
If a total UPS shutdown is required, verify that the critical load is OFF.
a.)
On the LCD panel, press the "TRANSFER" button, and then press the "STOP
INVERTER" icon to proceed UPS shutdown. (Refer to Figure 2.3)
b.)
Follow the "STOP INVERTER" 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.
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
MITSUBISHI ELECTRIC 9900D SERIES UPS
Page Number:
4-1
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