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9. Maintenance
9.5 Maintenance procedure of the ups in the manual bypass mode.
If the Hot-Swap replacement procedure of the power modules is not applicable (paragraph 9.4), the modules can still be
replaced by putting the UPS in maintenance bypass. This mode is also necessary if ever it is requested to service or replace
parts such as the control boards, backplane, upgrading the UPS firmware, etc.
ATTENTION
When working in the forced bypass and maintenance mode the load is not protected.
9.5.1 Accessing the manual maintenance bypass mode.
WARNING
It is strictly forbidden to change the power modules if first the following instructions have not been scrupulously
complied with!
1. Open the door of the Archimod® UPS;
2. Enable the UPS forced bypass function by acting directly on the front display.
Access the following menus to do this:
UPS settings ➝ Bypass ➝ Forced Mode;
Set the parameter value on "enabled".
In these conditions the power modules are excluded and the load is fed directly by the mains; "Bypass forced" appears
on the panel. When the unit is in the forced bypass mode, the wording "UPS LEGRAND®" blinks quickly on the front of
the panel. Likewise, the LEDs on the various power modules also blink quickly.
3. Put the manual maintenance bypass disconnector in the ON position. The load is now being powered directly by the
mains; the wording "Manual Bypass" appears on the panel.
4. Open the output disconnector by putting it in the OFF position;
5. Turn the UPS off, holding the "ON/OFF" push button down on the control panel for a few seconds;
6. Open the mains input disconnector by putting it in the OFF position;
Open all the battery disconnectors (FB+ and FB-) of the UPS and of the Archimod® BATTERY units (if installed);
8. Press the ON/OFF push button to discharge any internal capacities.
Now proceed with maintenance.
WARNING
There are dangerous live parts inside the equipment due to the internal batteries even if all the battery fuse holder
disconnectors are opened. To remove the battery induced voltage, remove at least 1 battery box from each battery
shelf (which will interrupt the battery string series).
9.5.2 Replacing a power module or adding new modules
1. Make sure that the maintenance bypass procedure described in the previous paragraphs has been scrupulously
applied.
2. Extract the module after having loosened the two securing screws.
WARNING
There are two holes on the cover of the power module through which it is possible to see two LEDs; if they are on it
means there is dangerous voltage on the rear connector.
MAKE ABSOLUTELY CERTAIN THAT THESE LEDs ARE OFF before handling the module. If they are on wait until they
have turned off.
3. Check that on the new power module the two LEDs that can be seen through the two holes on the cover are off. If they
are on wait until they have turned off.
4. Put the new power module in place of the old one or in one of the available compartments if you wish to increase UPS
power.
5. Secure the power module to the unit's frame with the 2 screws supplied, making certain they are down as far as they
can go and use only M4x20mm Allen screws;
Note: if the power module is not fixed with the screws prescribed, the switching-on of all the tunnel modules, controlled
by the control board, is inhibited.
74
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