
- 40 -
L
OAD ON STATIC BYPASS AFTER
M
ANUAL
B
YPASS
The following operations are to be performed to switch the UPS from “Manual Bypass” to “Load forced on bypass” status:
Switch on (close) the Input switch (SWIN), Bypass switch SWBYP and the Output switch SWOUT.
The system will turn on in stand-by “MANUAL BYPASS ACTIVE” 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 of the display.
Verify that no anomalies are present on the status bar (except [A10] – Battery circuit open, and [A11] - Cover of maintenance
switch is open).
Close the battery switch. Check that the battery starts to be charged.
From the “Command Panel” page, press the “System ON” icon to turn on the system.
Confirm the “System ON Command”, by selecting OK.
If the “SYSTEM ON” command is activated properly, all measurements will be ok and no anomalies will be present (except
[A11] Cover of maintenance switch is open”).
From the “Command Panel” page, press the “Bypass command” ON icon to force the static bypass on.
NOTE:
Perform this
step even if the bypass status appears to be already “ON”.
Confirm the “Bypass ON Command”, by selecting OK.
Verify that the system status changes to “LOAD FORCED ON BYPASS”.
Open the Manual bypass switch (SWMB).
Put back in place the Maintenance Bypass interlock paddle.
Verify the output voltages on the “System measurements” page and verify that no anomalies are present on the status bar.
The system is now in forced bypass mode. Please be aware that in this condition the load will be affected by any mains
disturbances, and the battery intervention is also inhibited.
S
YSTEM
O
FF COMMAND
From the “Command Panel” page, press the “System ON/OFF” icon to switch the System off.
Confirm “System OFF Command”, by selecting OK.
NOTE:
during prolonged periods of inactivity, it is good practice to shut down the UPS; open the input and output
switches (after system off) and lastly, with the UPS off, open all the battery cabinets to avoid unnecessary battery
discharge.
When the UPS is started again, it is possible that date and time will need to be manually restored.