Samsung E425

Critical

DVM PLUS III — Reverse phase or phase open (3-phase wiring of outdoor unit, R-S-T-N).

Samsung E425: Reverse phase or phase open (3-phase wiring of outdoor unit, R-S-T-N). This fault typically halts operation and needs immediate attention.

Possible causes

Two phases swapped during installation.
One phase interrupted (fuse/terminal).

Check steps

Measure phase sequence at R-S-T with a phase sequence tester.
Swap two phases or repair the interrupted phase/terminal.

Affected parts

Ana güç klemensi
Faz kabloları

Safety note

HIGH VOLTAGE — switch off main disconnect and verify de-energized before work.

Source: Samsung resmi servis kilavuzu (bagimsiz cift-dogrulandi) — Samsung DVM PLUS III Technical Data Book, ManualsLib (manual ID 1223320), page 60 — "E-425: Reverse phase or phase open. (3ø Wiring of outdoor unit, R-S-T-N)". Cross-verified against multiple independent Samsung service manuals (e.g. AM036FXMDCH Service Manual, ManualsLib p.31; AM036NXMDCR Service Manual, ManualsLib…

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

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