Fault Codes / Daikin / U2

VRV / Sky Air — Power supply defect / brief power failure.

Possible causes

• Undervoltage / phase loss.
• Loose terminal.

Check steps

• Check supply voltage & phases (400V ±10%).
• Re-tighten terminals.

Affected parts

• Servicehandbuch — Fehlercode nachschlagen

Safety note

Source: Daikin SM-TS3 (Simple Self-Diagnosis by Malfunction Code, resmi) veya VRV IV+ Service Manual (ManualsLib) — SM-TS3 p.5: 'U2 Malfunction of power supply or instantaneous power failure — Abnormal power supply voltage, Instantaneous power failure, Defective main circuit wiring.'

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

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