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E
MERGENCY
M
ANUAL
B
YPASS PROCEDURE
Quick procedure not recommended for external maintenance bypass operation or in case of anomalies
on the bypass line
.
Verify that the bypass voltages are correct on the “System measurements” page.
Verify that the inverter is synchronised to the bypass line (no presence of the messages “Bypass not available”
or Synchronisation disabled”).
Close the SWMB manual bypass switch: the bypass line will now be directly supplying the connected load.
Open the input switches (SWIN and SWBYP); output switches (SWOUT), battery fuse holder (SWBATT)
and all external Battery Cabinet switches if any external batteries are present. The display panel will turn off.
Wait for a minimum of 15 minutes in order to allow the electrolytic capacitors on the power board to
completely discharge and then perform the maintenance operations.
Having completed the maintenance operations, proceed to restart the UPS following the correct procedure.
Restore the On Line Mode after Manual Bypass
The following operations have to be performed in order to switch the UPS from “Manual Bypass” to ON
LINE mode:
Switch on the Mains (SWIN), the Bypass (SWBYP) and Battery input lines (SWBATT) and close the Output
switch (SWOUT).
The system will turn on in "STAND-BY WITH CB OFF" mode (The status led will light up and the display will
start).
Verify that the Mains and the Bypass input voltages are present on the “System measurements” page.
Verify that no anomalies are present on the status bar (except [C05] “Manual bypass command”).
From the “Command Panel” page, press the “System ON” icon to start the system.
Confirm the “System ON Command”, by selecting OK. To ensure that the system is in static bypass mode,
verify that the system is in “MANUAL BYPASS ACTIVE”. In this case, the bypass line is represented with a
blue filled line as indicated in the following image.
✔
✘
The bypass line is represented with a filled blue
line. In this condition, it is possible to open the
manual bypass switch.
The bypass line is represented with a white stripe. In
this condition, do not open the manual bypass
switch: the load will be lost.
