• The power to the access point is not on.
  ⇒ Check that the power to the access point is on.
• There is a possibility that the WLAN adapter is not correctly connected to the access point.
  ⇒ Disconnect the power supply to the air conditioner (via breaker or plug), and then re-connect.

• The firmware of the WLAN adapter or the indoor unit is under update.
• During the air conditioner registration (pairing of WLAN adapter)
  

The indoor unit is in the firmware update.
⇒ You cannot operate the air conditioner. Wait until the update is complete (for a maximum of 30 minutes).

The firmware update of the indoor unit is complete. The settings from the wireless remote controller are initialized.
⇒ Control the air conditioner from the wireless remote controller to resend the settings.

The malfunction may occur on the firmware of the indoor unit.
⇒ Consult authorized service personnel.