What's happening
Two devices on the panel's RS485 bus have been given the same Modbus address. Both reply to every poll at once, corrupting each other's data · so one address returns unreliable readings while a neighbouring address, where a device was expected, returns nothing.
How to spot it
Intermittent or unreliable data from one breaker · sometimes a measurement comes through, sometimes not.
A neighbouring breaker (often the next address up) shows no data at all.
During addressing work, the Hybird mobile app shows an alert that Modbus addressing failed because of an address conflict.
Why it happens
A breaker left in setup mode after an address change. The most common cause. If the green dip switch is not returned UP to work mode once an address is sent, the breaker keeps listening · the next address sent is written to it as well.
A reused breaker installed without re-addressing. A breaker from another panel keeps its old Modbus ID unless deliberately reassigned.
A third-party device in the breaker range. Hybird breakers use addresses 1–80 · keep external meters at 120 or higher.
How to fix it
Run the recovery guide
If the app has shown the failed-addressing alert, tap Open recovery guide · also available from the panel screen. The guide re-addresses every device on the panel and verifies the bus without changing the panel state, so you can carry on with the addressing you started. Breakers keep switching normally throughout. Return every dip switch UP to work mode before you begin, then follow the prompts.
This video shows the full dip-switch sequence on a live panel:
If it does not display, watch it on Loom. For every LED state, see Breaker states · Addressed, Addressing, Live and Isolated.
Safety: RS485 is low-voltage signal wiring and can be worked on with the panel live · do not de-energise the panel. Flipping a breaker into setup mode does not affect the circuit it protects. Avoid contact with AC terminals and follow local regulations for working inside a live distribution panel (Installationsbekendtgørelsen and DS/HD 60364 in Denmark, BS 7671 in the UK, VDE 0100 in Germany).
How to prevent it
Return each dip switch UP to work mode as soon as an address is confirmed.
Only ever one breaker in setup mode at a time · check for purple LEDs before sending an address.
Never reuse a breaker from another panel without deliberately reassigning its address.
Keep third-party meters at address 120 or higher.
Still stuck?
If the conflict persists after the recovery guide, or two devices cannot be told apart on site, contact Hybird support at [email protected] or +45 3020 4900 · we can confirm the addresses active on the bus and reassign them remotely.