Fault Codes / Daikin / E4

Critical

VRV / Sky Air — Low-pressure protection / LP sensor (suction below threshold).

Possible causes

• Low refrigerant.
• Iced evaporator / dirty filter.
• LP sensor faulty.

Check steps

• Measure suction pressure.
• Check filter/evaporator & airflow.
• Check charge & sensor.

Affected parts

• Niederdrucksensor
• Kältemittel

Safety note

Source: Daikin SM-TS3 (Simple Self-Diagnosis by Malfunction Code, resmi) veya VRV IV+ Service Manual (ManualsLib) — SM-TS3 p.3: 'E4 Actuation of low pressure switch (LPS) — Abnormally drop in low pressure, Defective low pressure sensor, Defective outdoor unit PCB, Defective connector contact.'

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

Look up in Enthalio →

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