Fault Codes / Daikin / H4

Critical

VRV / Sky Air — Low pressure switch (LPS) actuation.

Possible causes

• Low refrigerant / leak.
• Iced evaporator / dirty filter.
• LP switch faulty.

Check steps

• Measure suction pressure, leak test.
• Check airflow/evaporator & LP switch.

Affected parts

• Druckschalter (LP)
• Kältemittel

Safety note

Source: Daikin SM-TS3 (Simple Self-Diagnosis by Malfunction Code, resmi) veya VRV IV+ Service Manual (ManualsLib) — SM-TS3 p.3: 'H4 Malfunction of low pressure switch (LPS)' — exact match.

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

Look up in Enthalio →

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