DAI

Daikin C1

Medium

VRV / Sky Air — Failure of transmission between indoor unit PCB and sub PCB

Daikin C1: Failure of transmission between indoor unit PCB and sub PCB This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Defective connector contact between the boards
Defective sub PCB or indoor unit PCB

Check steps

Check and reseat the connector between the PCBs
If the fault persists, replace the sub PCB or main PCB

Affected parts

Indoor unit PCB
Sub PCB
Connector

Safety note

Disconnect power before working on the unit

Source: Daikin resmi servis kilavuzu (bagimsiz cift-dogrulandi) — Daikin Industries, Ltd., After Sales Service Division, "Simple Self-Diagnosis by Malfunction Code" (SM-TS3), Indoor Unit table, p.3: Malfunction code "C1 — Failure of transmission (between indoor unit PCB and sub PCB)"; Supposed causes: "Defective connection of the connector between indoor unit PCB"; Objects colu…

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

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