Operating the UPS40
3.3. Transferring to Battery Mode
The UPS operates in Normal mode unless the mains/utility power fails or it is performing a battery self-test, then
it automatically transfers to Battery mode for the back-up time available or the mains/utility power is restored.
Once input power is restored, the UPS returns to Normal mode.
NOTE: Battery back-up run times are listed in Battery Run Times on page 70.
3.4. Transferring from Normal to Bypass Mode
Press and hold the power button for 2 seconds.
• If the bypass power is within normal operating range, the option to continue to Bypass mode or turn-o the
UPS displays:
» Use the arrow buttons to select To the Bypass or Turn o UPS, and press Enter.
» Use the arrow buttons to select No or Yes, then press Enter to conrm.
• If the bypass power is outside normal operating range, the option turn-o the UPS displays. Use the up/down
arrows to select No or Yes, then press Enter to conrm.
3.5. Transferring from Bypass to Normal Mode
Press and hold the power button for 2 seconds.
• If the UPS is operating normally, without faults, the option to continue to turn-on or turn-o the UPS displays:
» Use the arrow buttons to select Turn on UPS or Turn o UPS, and press Enter.
» Use the arrow buttons to select No or Yes, then press Enter to conrm.
NOTE: The UPS automatically switches back to normal mode after an “overheated” or “overloaded” fault is cleared
and normal power is restored.
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