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

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.