Heat pumps · Error codes · Panasonic
LAN-IP-COLLISIONPanasonic · Panasonic, all models
LAN-IP-COLLISION on a Panasonic heat pump: LAN IP address collision
Short answer
On a Panasonic heat pump, LAN-IP-COLLISION means: LAN IP address collision. The heat pump keeps running.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: LAN IP address collision.
Part involved: CZ-TAW1 network adaptor (Aquarea Smart Cloud / Service Cloud).
Likely causes:
- Another device on the network uses the same IP address (IP collision).
Is it safe?
| Does the heat pump stop? | No |
|---|---|
| Severity | Warning |
| Engineer needed? | No |
The heat pump keeps running.
Resetting itself: Clears when communication is restored (LED state).
Manual reset: Not applicable; adaptor Register/Reset switch is for user registration/reset of the adaptor.
What you can check
- Check the home router is powered and working; for wired mode check the LAN cable is plugged into the adaptor and router; for wireless mode check signal strength with the Check switch (Link LED) as described in the quick guide and use Ethernet if the signal is BAD. The heat pump itself keeps running; the remote controller remains usable.
What the engineer will check
- Check CN-CNT cable between adaptor and indoor unit PCB; check indoor unit power; check adaptor firmware/registration; replace adaptor if faulty.
Who to ask for: Heat pump installer (controls/connectivity).
Certification: None statutory.
What you might notice
Sources
- Aquarea Smart & Service Cloud CZ-TAW1 summary presentation (2020-04-01) ↗ · page 9 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026