Operating Procedures - Mitsubishi Electric 9900CX SERIES Owner Technical Manual

3.4 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
CAUTION : Before the UPS startup, the internal Bypass line starts to supply
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, select "OPERATION" tab, and then press the "START OPERATION"
button to proceed UPS start-up. (Refer to Figure 2.3).
e) Follow the "START OPERATION" guidance accordingly until the completion of the inverter
startup.
NOTE : When "REMOTE OPERATION MODE" is displayed on the LCD panel, the
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
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 External input (or Bypass) Circuit Breaker.
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.
MITSUBISHI ELECTRIC 9900CX SERIES UPS
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