Daikin L1

Critical

VRV / Sky Air — Inverter PCB (INV) fault.

Daikin L1: Inverter PCB (INV) fault. This fault typically halts operation and needs immediate attention.

Possible causes

IPM/IGBT or current sensor on INV PCB faulty.
Overload from high pressure.

Check steps

Power off: check INV PCB & compressor connection.
Rule out overload causes (pressure/fan).

Affected parts

Inverter-Platine
Verdichter

Safety note

High voltage! Let DC-link capacitors discharge before work.

Source: Daikin SM-TS3 (Simple Self-Diagnosis by Malfunction Code, resmi) veya VRV IV+ Service Manual (ManualsLib) — SM-TS3 p.4: L1 'Malfunction of inverter PCB' — RA/SkyAir/VRV/Chiller checked (Package not checked). Matches researcher's citation.

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