Maintenance Bypass Set-Up Procedures - Mitsubishi Electric 1100A Series Owner Technical Manual

WARNING: Verify the load is OFF if the next step is to be performed.
WARNING
NOTE: Power to the critical load is supplied through the static bypass line.
!
Power to the critical load will be lost after execution of the next step.
The load will drop.
NOTE
4. To shutdown the critical load, open the external input circuit breaker (User supplied.).
CAUTION: In bypass mode, all UPS power terminals are still live.
CAUTION
C) EPO (Emergency Power Off) Procedure
If an all power supply shutdown is required in an emergency situation, press the "EPO" button
on the front panel. The UPS will be shutdown and no power is supplied to the load.
WARNING: With EPO operation, although all output power from the
WARNING

3.7 MAINTENANCE BYPASS SET-UP PROCEDURES

NOTE: Consult MITSUBISHI ELECTRIC POWER PRODUCTS, INC for
!
External Maintenance Bypass Panel.
NOTE
A) Load transfer from inverter to external maintenance bypass
1.
On the LCD panel, press the "START/STOP" icon to proceed UPS shutdown. (Note: inverter
STOP function inhibited if bypass and inverter are out of sync.)
2. Confirm via the flow diagram on the LCD that the load is fed from the UPS static bypass
line.
1100A SERIES UPS
OWNERS / TECHNICAL MANUAL
Lethal voltages 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. Internal devices may be
hot.
UPS is shutdown, it is necessary to manually open the
input circuit breaker (user supplied), to remove the input
power to the UPS.
MITSUBISHI ELECTRIC 1100 SERIES UPS
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3-13