Error code
live-firmware-lamp-fast-blink WLAN firmware update in progress
How it shows on the unit Live firmware-update indication blinks rapidly during WLAN firmware update
Applies to 3 models
ASEH09KHCBN, ASEH12KHCBN, ASEH14KHCBN
What this means
The WLAN device firmware is being updated, and mobile-app control is unavailable for up to 5 minutes.
What you can check yourself
- Operate the unit with the remote control or wait up to 5 minutes.
- Do not disconnect power during the update.
Still not resolved? Contact a qualified installer or servicer.
See the official Fujitsu manualA deep link to the manufacturer's own PDF for full technical detail. We link to manuals, we never host them.
Using Claude Code or Meta Muse? Connect HeatPump AI and ask it about live-firmware-lamp-fast-blink.