Copeland 7 Flashes

Medium

CoreSense — Open Run Circuit — module detects a demand signal and current in the 'S' winding, but no current in the 'R' winding for 2 seconds (Flash Code 7, red, immediate lockout).

Copeland 7 Flashes: Open Run Circuit — module detects a demand signal and current in the 'S' winding, but no current in the 'R' winding for 2 seconds (Flash Code 7, red, immediate lockout). This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Broken wiring/connection to the run winding (R).
Contactor contact faulty/burnt.

Check steps

Check wiring to the R winding.
Check contactor contacts.

Affected parts

Kontaktor
Verdichterverkabelung

Safety note

Isolate power before working on the control panel.

Source: Emerson AE8-1385 CoreSense Diagnostics for Copeland Scroll UltraTech Compressors (2011), Code 7 description, p.5

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

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Related fault codes

Pressure switch tripped (HP or LP).2 Flashes Locked rotor (compressor not turning).4 Flashes Welded contactor (runs after stop signal).8 Flashes Low voltage (supply too low).9 Flashes Long run time (efficiency warning).1 Flash Module fault (CoreSense module internal failurSolid Red