DAI

Daikin J9

Medium

VRV / Sky Air — Subcooling heat exchanger gas thermistor fault.

Daikin J9: Subcooling heat exchanger gas thermistor fault. This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Thermistor open/short.
Connector loose.

Check steps

Check connector on outdoor PCB.
Check thermistor resistance per service manual.

Affected parts

Unterkühlungs-Thermistor

Safety note

Follow F-Gas.

Source: Daikin SM-TS3 (Simple Self-Diagnosis by Malfunction Code, resmi) veya VRV IV+ Service Manual (ManualsLib) — SM-TS3 p.4: 'J9 Malfunction of thermistor (Refrigerant circuit) — Defective gas pipe thermistor' — 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