NIBE 54

Critical

F-Serie — Motor protection alarm — motor protection breaker tripped.

NIBE 54: Motor protection alarm — motor protection breaker tripped. This fault typically halts operation and needs immediate attention.

Possible causes

Compressor overloaded / short circuit.

Check steps

Check motor protector, measure winding & insulation.

Affected parts

Motorschutzschalter
Verdichter

Safety note

High voltage! Let capacitors discharge.

Source: NIBE resmi servis kılavuzu — NIBE Alarm List (Nov 2018 overzicht), Nr.54: 'The motor protection breaker has triggered. Proposal: Check the cabling connections of the compressor. Manual reset.' (v1747-1 p.2 lists it as 'Motor protection alarm | The motor protection breaker has triggered.') — matches app's 'Mo…

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

Look up in Enthalio →

Related fault codes

High pressure alarm – HP switch tripped repeat50 Compressor phase 1 missing or below 160V.40 Faulty phase sequence.43 Hot gas alarm – discharge temp over limit.55 High pressure alarm from outdoor unit.220 Short compressor runs – stopped 3× shortly aft229