UPS Operating Instructions
6-14 Eaton 9E UPS (40–60 kVA, 208/220V) Installation and Operation Manual P-164000058—Rev 4 www.eaton.com/powerquality
6.3.5 Transfer from HE Normal Mode to Standard Normal Mode
To transfer the load to Standard Normal mode:
1. S e l e c t t h e 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 HE: ENABLE DISABLE command, then press the
RETURN pushbutton.
The UPS transfers to Standard Normal mode.
The NORMAL status indicator is illuminated.
6.3.6 Transfer from Standard Normal Mode to HE Normal mode
To transfer the load to HE Normal mode:
1. S e l e c t t h e 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 HE: DISABLE ENABLE command, then press the
RETURN pushbutton.
The UPS transfers to HE Normal mode if no abnormal power conditions are detected. If abnormal power
conditions are detected, the UPS will wait and transfer to HE mode when conditions are cleared.
The NORMAL status indicator is illuminated.
6.3.7 Transfer from Normal Mode to Maintenance Bypass
To transfer the load to maintenance bypass:
1. Transfer the load to bypass mode by performing the procedure in paragraph 6.3.3.
2. Close the maintenance bypass breaker.
3. Slide the interlock cover to the left (see Figure 6-8).
4. Open the UPS output breaker.
The UPS is now bypassed, with the load powered directly by utility power.
5. Open the UPS input circuit breaker.
Power is present inside the UPS cabinet.
6.3.8 Transfer from Maintenance Bypass to Normal Mode
To transfer the load to Normal mode:
1. Close the UPS input circuit breaker.
2. Restart the UPS in bypass mode by performing the procedure in paragraph 6.3.2.
3. Verify that the UPS is in bypass mode.
4. Close the UPS output breaker.
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