Fault Codes / Hitachi / 13

Set Free Sigma / IVX — Anti-freeze thermistor (indoor unit) fault.

Possible causes

• Sensor faulty or wiring broken.

Check steps

• Measure sensor resistance, check wiring.

Affected parts

• Frostschutzfühler

Safety note

Source: Hitachi RAS-2-HVNP VRF Service Manual, "Alarm Codes For The Outdoor And Indoor Units" p.207 (ManualsLib scan of official manual)

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

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