DAI

Daikin UH

High

VRV / Sky Air — UH = 'malfunction of system' (system-level fault) caused by improper transmission wiring between units or a defective PCB. It is NOT 'refrigerant system address undetermined' — that belongs to code UF.

Daikin UH: UH = 'malfunction of system' (system-level fault) caused by improper transmission wiring between units or a defective PCB. It is NOT 'refrigerant system address undetermined' — that belongs to code UF. This fault noticeably affects operation.

Possible causes

Auto-addressing not completed.
Indoor/outdoor wiring faulty.

Check steps

Re-run auto-addressing.
Check interconnect wiring in system.

Affected parts

Verbindungsleitung

Safety note

230V — isolate power.

Source: Daikin resmi servis kılavuzu — DÜZELTİLDİ: Daikin Industries, Ltd., After Sales Service Division, "Simple Self-Diagnosis by Malfunction Code" (SM-TS3), official PDF at daikin.com (products/ac/services/error_codes), page 5 malfunction-code table: UH = "Malfunction of system" (causes: improper transmission wiring connection…

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

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Related fault codes

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