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87
1 2 M A I N T EN A N C E BY PA SS O P ER AT I O N S
LED indicators status on all modules
Display on all modules
LED INDICATION
COLOR
SINGLE/DUAL INPUT FEED CONFIGURATION
Rectifier
Green
Bypass
Green
Load
Yellow
Battery
Green
3. If present, turn to the ON position (close) the
maintenance bypass switch
Q1
on all frames.
4. The message “MAN BYP CLOSED” will appear
in the event log of all modules.
LED INDICATION
COLOR
SINGLE/DUAL INPUT FEED CONFIGURATION
Rectifier
Green
Bypass
Green
Load
Yellow
Battery
Green
5. If the maintenance bypass switch
Q1
is not
installed in the frames, the load can be trans-
ferred directly to “External Maintenance By-
pass”.
In this case turn to the ON position (close)
the “External Maintenance Bypass” switch
and lock it to this position.
6. Load OFF all modules by means of the ON/
OFF buttons present on their control panels
(Always confirm with “ENTER” when re-
quired).
7. The output isolator
Q2
installed on all frames
can be now opened (Turned to OFF position)
8. Turn to the OFF position (open) the battery
breakers present on all frames and external
battery cabinets or racks breakers or fuses
LED indicators status on all modules
Display on all modules
LED INDICATION
COLOR
SINGLE/DUAL INPUT FEED CONFIGURATION
Rectifier
Green
Bypass
Green
Load
Yellow
Battery
Flashing red
The load is
NOT
protected by the DPA 250S4 UPS