Why is the AP LED flashing slowly in red?

Zyxel_Jami

If the AP LED is slowly blinking red, for example blinking approximately three times and then turning off for about three seconds, this usually indicates that the AP is unable to maintain a stable uplink connection.

This behavior may be related to the Ethernet cable, connector condition, switch port, or Ethernet link negotiation between the AP and the switch.

For further verification, try using another Ethernet cable and connecting the AP to a different switch port. Then check whether the AP uplink can negotiate stably at 1 Gbps.