Daikin LC

High

VRV / Sky Air — Communication inverter ↔ control (outdoor) fault.

Daikin LC: Communication inverter ↔ control (outdoor) fault. This fault noticeably affects operation.

Possible causes

Wiring INV–control PCB loose/faulty.
INV or control PCB faulty.

Check steps

Check internal INV↔control link.
Power off: reseat connectors, check PCBs.

Affected parts

Inverter-Platine
Steuer-PCB

Safety note

High voltage! Let capacitors discharge.

Source: Daikin SM-TS3 (Simple Self-Diagnosis by Malfunction Code, resmi) veya VRV IV+ Service Manual (ManualsLib) — SM-TS3 p.4: LC 'Malfunction of transmission between control and inverter PCB' — RA/SkyAir/VRV/Package/Chiller checked. Matches.

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

Look up in Enthalio →

Related fault codes

Outdoor PCB faulty.E1 Refrigerant shortage (low pressure / stop valvU0 Power supply defect / brief power failure.U2 Transmission error indoor/outdoor unit.U4 Low-pressure protection / LP sensor (suction bE4 Inverter compressor instantaneous overcurrent L5