Eaton 9E - Page 89

UPS Operating Instructions
Eaton 9E UPS (40–60 kVA, 208/220V) Installation and Operation Manual P-164000058—Rev 4 www.eaton.com/powerquality 6-13
16. On the UPS System Control screen, select the LOAD OFF BYPASS command, then press the
RETURN pushbutton.
The critical load is immediately supplied by the bypass source, in Bypass mode.
The BYPASS status indicator is illuminated.
17. If the UPS contains an output breaker, close the output breaker.
18. If an ITC with an input and output transformer is installed, close the output breaker.
The critical load is immediately supplied by the bypass source, in Bypass mode.
6.3.3 Transfer from Normal to Bypass Mode
To transfer the critical load to Bypass mode:
CAUTION
In Bypass mode, the critical load is not protected from commercial power interruptions and
abnormalities.
1. Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
2. If not already selected, select UPS on the System Control screen.
3. On the UPS System Control screen, select the NORMAL BYPASS command, then press the RETURN
pushbutton.
The UPS transfers to Bypass mode.
The BYPASS status indicator is illuminated. The power module remains on.
WARNING
Power is present inside the UPS cabinet.
6.3.4 Transfer from Bypass to Normal Mode
To transfer the critical load to Normal mode:
1. Select the CONTROLS symbol on the main menu bar. The System Control screen is displayed.
2. If not already selected, select UPS on the System Control screen.
3. On the UPS System Control screen, select the BYPASS NORMAL command, then press the RETURN
pushbutton.
The UPS transfers to Normal mode. If the power module is not available, the system remains on bypass
and an alarm sounds.
The NORMAL status indicator is illuminated.