589 on a NIBE heat pump: Incorrect PCB in heat pump: The heat pump has the wrong baseboard

What it means

The manual says: Incorrect PCB in heat pump: The heat pump has the wrong baseboard.

Part involved: PCB / software configuration.

When it shows: The heat pump has the wrong baseboard.

Likely causes:

• S2125: Baseboard replaced with one not intended for this product.

Is it safe?

The manual does not say whether the heat pump stops.

Resetting itself: no/unknown - not stated.

Manual reset: Reset from the controller alarm menu ('reset alarm' / 'Reset alarm and try again'); alarm recurs if the cause remains.

What you can check

• Read the alarm text and the 'info/action' help on the controller display (VVM/SMO or S-series smartguide). NIBE's manuals let the homeowner select 'reset alarm' ('Reset alarm and try again' on S-series); if the lamp returns to normal the alarm has cleared. If it comes back, do not keep resetting: select 'aid mode' ('Auxiliary operation' on S-series) if offered, so any electric additional heat keeps heat/hot water going, and contact your installer. Note the alarm and contact your installer; no homeowner action beyond resetting.

What the engineer will check

• Check serial number/software versions, PCB type and DIP switch settings; update software or replace PCB as required. NIBE lists: Baseboard replaced with one not intended for this product.

Who to ask for: NIBE-trained heat pump installer (NIBE PRO / VIP).

Certification: None specific beyond competent heat pump installer; electrical work to BS 7671.

What you might notice

• Heat pump will not start

Sources

• Installer manual Air/water heat pump NIBE S2125 UK 1x230V IHB EN 2525-1 (831874) ↗ · IHB EN 2525-1 · page 42 · Reviewed 23 September 2026

A code explains what the controller detected, not a confirmed root cause.

Reviewed: 23 September 2026