Daikin H8

High

VRV / Sky Air — Compressor input (CT) system fault.

Daikin H8: Compressor input (CT) system fault. This fault noticeably affects operation.

Possible causes

Current transformer (CT) faulty / wiring.
Supply issue / loose terminal.

Check steps

Check supply & terminals.
Check CT/inverter PCB.

Affected parts

Inverter-Platine

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: H8 'Malfunction of compressor input (CT) system' — only RA checked. Matches researcher's claim.

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