How to pair centralite 4257050-RZHAC using zigbee2mqtt?

Tags: #<Tag:0x00007f73971e1100> #<Tag:0x00007f73971e1038>

I just bring up CC2538+CC2592 module using zigbee2mqtt and home-assistant
I can see from log.txt below, module is up and running
I have Centralite 4257050-RZHAC switch and I reset it by pressing on/off button while plugin to the wall. While pressing on/off button, I notice there is click sound on the switch and after that the light is flashing.
After that I wait, but I don’t see anything pairing in the log file.
I even restart zigbee2mqtt while switch device light is still flashing.
Am I missing anything?

configuration.yaml

permit_join: true
mqtt:
  base_topic: zigbee2mqtt
  server: 'mqtt://localhost:1883'
  user: xxx
  password: xxx
serial:
  port: /dev/ttyS2
advanced:
  network_key:
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx
    - xxx

log.txt

info  2020-08-25 20:15:06: Starting Zigbee2MQTT version 1.14.3 (commit #0db3f3c)
info  2020-08-25 20:15:06: Starting zigbee-herdsman...
info  2020-08-25 20:15:14: zigbee-herdsman started
info  2020-08-25 20:15:14: Coordinator firmware version: '{"type":"zStack30x","meta":{"transportrev":2,"product":2,"majorrel":2,"minorrel":7,"maintrel":2,"revision":20200211}}'
info  2020-08-25 20:15:15: Currently 0 devices are joined:
warn  2020-08-25 20:15:15: `permit_join` set to  `true` in configuration.yaml.
warn  2020-08-25 20:15:15: Allowing new devices to join.
warn  2020-08-25 20:15:15: Set `permit_join` to `false` once you joined all devices.
info  2020-08-25 20:15:15: Zigbee: allowing new devices to join.
info  2020-08-25 20:15:15: Connecting to MQTT server at mqtt://localhost:1883
info  2020-08-25 20:15:15: Connected to MQTT server
info  2020-08-25 20:15:15: MQTT publish: topic 'zigbee2mqtt/bridge/state', payload 'online'
info  2020-08-25 20:15:16: MQTT publish: topic 'zigbee2mqtt/bridge/config', payload '{"version":"1.14.3","commit":"0db3f3c","coordinator":{"type":"zStack30x","meta":{"transportrev":2,"product":2,"majorrel":2,"minorrel":7,"maintrel":2,"revision":20200211}},"network":{"panID":6754,"extendedPanID":"0x00124b00061057de","channel":11},"log_level":"info","permit_join":true}'