Eaton 93PR Series - 6.3.3. Switch from “Online” mode to “Bypass” mode; 6.3.4. Switch from “Bypass” mode to “Online” mode

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closed, and that the maintenance bypass switch is open (if the UPS is equipped with such a
switch), then close the front door.
2. Close the external input distribution switch.
3. Close the external bypass distribution switch.
4. Observe the logic power supply indicated on the UPS control panel, and repeat steps 1-3 for
each UPS in the system.
5. Select “Control” on the menu, and enter the password to access the control interface.
6. Select “System” on the control interface.
7. Click the “Enter Bypass Mode” button on the system interface, and press “OK” to switch to
bypass operations.
8. At this moment, the UPS works in bypass mode, and the bypass indicator lamp is lit.
6.3.3. Switch from “Online” mode to “Bypass” mode
Switch the load to the “Bypass” mode by performing the following steps:
CAUTION
When the UPS is in “Bypass” mode, the critical load is not protected if any bypass
interruption or exception occurs.
1. Click the “Control” button on the main page to switch to the “System Control” page.
2. Press the “Switch to Bypass” button on the “System Control” page. If bypass is unavailable,
the control unit will continue operation and sound an alarm. Otherwise, the bypass power will
be supplied to the critical load immediately.
3. The system works in bypass mode, and the bypass indicator lamp is lit. The UPS is at “Ready”
status, and the system is in “Bypass Mode”.
6.3.4. Switch from “Bypass” mode to “Online” mode
The critical load can switch to “Online” mode by performing the following steps:
1. Click the “Control” button on the main page to switch to the “System Control” page.
2. Press the “Start” button on the “System Control” page. If the loading capacity of the UPS
is insufcient at this point, the system will remain in bypass mode, and the UPS will sound
an alarm. Otherwise, the UPS system will switch to online mode.
3. At this point, the UPS works in online mode and the online status indicator lamp is lit, and
the system status displayed is “Online Mode”.