LEGRAND Trimod HE 10, Installation And Maintenance Manual

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Trimod HE®
Installa
tion and main
tenanc
e manual
43
Power module replacement or inclusion of new modules
1. Check that the procedure for setting the maintenance bypass mode described in the paragraph above has been applied.
2. Extract the power module after undoing the two fixing screws.
CAUTION
On the cover of the power module there are two holes from which it is possible to see two leds that signal the presence of
dangerous voltage on the rear connector . Before performing any operation on the power module, make sure that these
leds are off. If they are on, wait for them to turn off.
3. Check that the two leds visible through the two holes in the side cover of the new power module are off. If they are on,
wait for them to turn off.
4. Insert the new power module in the same slot where the previous one was located.
5. Fix the new power module to the UPS frame with the two screws provided along with the power module, making sure
they abut. Use SHC M4x20 screws (hex socket head). The two fixing screws allow the power module’s earthing and must
both be fixed for safety purposes.
The procedure described does not need further manual setups from the control panel. The UPS automatically recognises
the new power module and it is configured automatically.
INDICATION
The procedure for adding power modules is the same as the previous one. In step 2, remove the plastic masks of the
kit 3 108 66 that cover the empty slots where you want to add new power modules.
Exiting from maintenance manual bypass
To transfer the UPS from the maintenance bypass status to the online status, do the following:
1. Check that the output switch (S2) is open (OFF position).
2. Close the battery breakers of the UPS and of all the Trimod HE BATTERY (if present).
3. Close the mains input switch (S3) bringing it to the ON position.
4. Press the ON/OFF key to start up the UPS. When the display shows the text “<ENTER> to confirm UPS turn ON”, press
the ENTER key.
CAUTION
If the firmware of the power modules is out of alignment, the status indicator flashes red rapidly and the display shows
the text “Invalid PM SW Versions: to execute update”.
Press the ENTER key to update the modules and complete the start up phase. Press the ESC key to interrupt the update
and start-up procedures.
If no operation is carried out within 30 seconds, the UPS turns off.
5. Wait until the start-up procedure is completed. The main screen is shown on the display. Under these conditions the
UPS is on but the load is powered directly by the bypass line. The display shows together the texts “Manual Bypass”
and “Forced on Bypass”. The backlit indicator shines orange.
6. Open the output disconnector switch (S2) bringing it to the ON position.
7. Open the maintenance manual bypass switch (S1) bringing it to the OFF position.
8. Enable the UPS in inverter (on-line) mode. Enter in the main menu and follow the path UPS Setup 
Bypass

Forced Mode
Set the value of the parameter to “Disabled” with the ARROW UP/DOWN keys. Press the ENTER key to confirm.
9. At the end of the procedure the load is powered by the UPS. Under these conditions the backlit indicator shines green.
10. Close the Trimod HE UPS door (the keys must not be left at the operator’s disposal).