Planet GS-5220 User Manual page 419

L3 gigabit/10 gigabit managed poe switch

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AC power cord is not inserted or faulty.

Check that the AC power cord is inserted correctly.

Replace the power cord if the cord is inserted correctly; check that the AC power source is working by connecting a

different device in place of the switch.

If that device works, refer to the next step.

If that device does not work, check the AC power.

User's Manual of GS-5220 PoE Series Managed Switch