Fault Codes / Copeland / 4 Flashes

CO

Copeland 4 Flashes

Medium

CoreSense — Locked rotor (compressor not turning).

Copeland 4 Flashes: Locked rotor (compressor not turning). This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Mechanically seized.
Start capacitor/contactor faulty.

Check steps

Check voltage & start components.
Measure compressor windings.
Check for mechanical lock.

Affected parts

Anlaufkondensator
Schütz
Verdichter

Safety note

230/400V — isolate power.

Source: Emerson AE8-1385 CoreSense Diagnostics, Tablo 1/2 s.9,11

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

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