Troubleshooting Tip: Ubiquiti AP Not Powering Up with FortiSwitch 648F ("Power Fault: Error Type 9" on PoE Port)

[dwivedis]

Description	This article outlines steps to diagnose an issue where the Ubiquiti AP AC Lite fails to power up when connected to a FortiSwitch 648F. The PoE port displays a "Power Fault: Error Type 9 (Start Fault Condition)" error.
Scope	FortiSwitch
Solution	In the output below, an Ubiquiti Access Point is connected to port1, and the following error message is observed: Interface Status State Max-Power(W) Power-consumption(W) Priority Class Error ------------------------------------------------------------------------------------------------------------ port1 Enabled Fault:4 N/A N/A N/A N/A Power Fault: Error Type 9 ((Start Fault Condition)) port2 Enabled Searching 0.00 0.00 Low 0 port3 Enabled Searching 0.00 0.00 Low 0 port4 Enabled Searching 0.00 0.00 Low 0 port5 Enabled Searching 0.00 0.00 Low 0 port6 Enabled Searching 0.00 0.00 Low 0 port7 Enabled Searching 0.00 0.00 Low 0 port8 Enabled Searching 0.00 0.00 Low 0 port9 Enabled Searching 0.00 0.00 Low 0 port10 Enabled Searching 0.00 0.00 Low 0 port11 Enabled Searching 0.00 0.00 Low 0 port12 Enabled Searching 0.00 0.00 Low 0 port13 Disabled Disabled 0.00 0.00 Low 0 port14 Disabled Disabled 0.00 0.00 Low 0 port15 Disabled Disabled 0.00 0.00 Low 0 port16 Disabled Disabled 0.00 0.00 Low 0 port17 Disabled Disabled 0.00 0.00 Low 0 port18 Disabled Disabled 0.00 0.00 Low 0 port19 Disabled Disabled 0.00 0.00 Low 0 port20 Disabled Disabled 0.00 0.00 Low 0 port21 Disabled Disabled 0.00 0.00 Low 0 port22 Disabled Disabled 0.00 0.00 Low 0 port23 Disabled Disabled 0.00 0.00 Low 0 port24 Disabled Disabled 0.00 0.00 Low 0 port25 Disabled Disabled 0.00 0.00 Low 0 port26 Disabled Disabled 0.00 0.00 Low 0 port27 Disabled Disabled 0.00 0.00 Low 0 port28 Disabled Disabled 0.00 0.00 Low 0 port29 Disabled Disabled 0.00 0.00 Low 0 port30 Disabled Disabled 0.00 0.00 Low 0 port31 Disabled Disabled 0.00 0.00 Low 0 port32 Disabled Disabled 0.00 0.00 Low 0 port33 Disabled Disabled 0.00 0.00 Low 0 port34 Disabled Disabled 0.00 0.00 Low 0 port35 Disabled Disabled 0.00 0.00 Low 0 port36 Disabled Disabled 0.00 0.00 Low 0 port37 Disabled Disabled 0.00 0.00 Low 0 port38 Disabled Disabled 0.00 0.00 Low 0 port39 Disabled Disabled 0.00 0.00 Low 0 port40 Disabled Disabled 0.00 0.00 Low 0 port41 Disabled Disabled 0.00 0.00 Low 0 port42 Disabled Disabled 0.00 0.00 Low 0 port43 Disabled Disabled 0.00 0.00 Low 0 port44 Disabled Disabled 0.00 0.00 Low 0 port45 Disabled Disabled 0.00 0.00 Low 0 port46 Disabled Disabled 0.00 0.00 Low 0 port47 Disabled Disabled 0.00 0.00 Low 0 port48 Disabled Disabled 0.00 0.00 Low 0 Cause: The Ubiquiti AP AC Lite is not a standard IEEE-compliant PoE-powered device (PD). It relies on non-standard PoE behavior, which is not supported by the FortiSwitch 648F-FPOE. As a result, compatibility issues may occur when attempting to power the device through this switch. Solution: To ensure proper functionality and avoid compatibility issues, it is recommended not to connect the Ubiquiti AP AC Lite to the FortiSwitch 648F-FPOE. Instead, use a FortiSwitch model that supports 2-pair PSE (Power Sourcing Equipment), which is more compatible with the Ubiquiti AP’s power requirements.