OPTI-UPS PS7500DL - Manual (Page 5)

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4. Enter-Key: It is pressed with the Down-key to turn on the UPS, with the Up-key
to turn off the UPS. Beside, it is pressed to confirm and enter the item selected.
5. Fault LED (red): To indicate the UPS is in fault condition because of inverter
shutdown or over-temperature.
6. Warning LED (yellow): To indicate the UPS is in the status of overload, bypass
and battery back-up.
7. Normal LED (green): To indicate the UPS is operating normally.
8. ON/TEST/MUTE key: It should be pressed with the control key simultaneously
to switch on UPS, do UPS auto-test in normal AC mode and turn off the buzzer
in battery operation.
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4. OUTLINE DESCRIPTION
4.1 Case Outline
PS650D