Archimod HE 240-480®
Installa
tion and main
tenanc
e manual
61
6.4.3 Maintenance procedure with UPS off
CAUTION
The shutdown procedure must be applied only if the load is off or does not need to be powered by the UPS.
1. Keep the ON/OFF key pressed for at least two seconds.
2. When the display shows the text “Turn off the UPS?”, press the ENTER key.
3. Wait for the shutdown operations to complete.
4. Open the output disconnector by bringing it to the OFF position.
5. Open the mains input disconnector and bypass input disconnector by bringing them to the OFF position.
6. Open the battery disconnectors of the external battery units.
7. Press the ON/OFF key to discharge any internal capacity.
8. Open the circuit breaker upstream of the UPS which supplies power from the mains. If these operations are performed
correctly, there will be no voltage to the UPS. It is now possible to proceed with the maintenance operations.
WARNING
Inside the drawer where the command boards and the relay interface card are located there could be dangerous voltage
due to the connection of the external backfeed control line.
Be careful of connector EC9 of the relay interface card to which the backfeed line is connected.
Note:
by making the external backfeed protection as per the diagram in paragraph 4.2.6, it is possible to isolate the line
from outside and make it safe.
6.5
Replacing the fuses and surge arrester (DIN rail)
A surge arrester and two fuse holders can be found in the DIN rail inside the cabinet with the UPS connection busbars.
The first fuse holder, containing a 16 A fuse, is in series to the surge arrester. The second fuse holder, containing a 2 A fuse,
is in series to the input bypass disconnector release coil.
Summary of Contents for Archimod HE 240
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