Wolf 702

Critical

CHA / BWL — Low pressure spread (NEG) — refrigerant circuit low pressure too low.

Wolf 702: Low pressure spread (NEG) — refrigerant circuit low pressure too low. This fault typically halts operation and needs immediate attention.

Possible causes

Low refrigerant charge or insufficient heat source capacity.

Check steps

Check refrigerant charge and heat source (brine/air).

Affected parts

Niederdruckschalter
Anschlussleitung

Safety note

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Source: Wolf Fehlercode-Liste (offizielle Wolf-Dokumentation), Abschnitt "Fehlercodes der Wärmepumpen BWL" (emax-haustechnik.de Spiegel)

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

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