Fault Codes / Daikin / HJ

DAI

Daikin HJ

High

Altherma — Water pressure sensor abnormality (HJ-10).

Daikin HJ: Water pressure sensor abnormality (HJ-10). This fault noticeably affects operation.

Possible causes

System pressure too low (water shortage).
Pressure sensor faulty / connector loose.

Check steps

Check system pressure, top up if needed.
Check pressure sensor & wiring.

Affected parts

Wasserdrucksensor

Safety note

Depressurize before sensor replacement.

Source: Daikin Altherma 3 Installer Ref. 4P685228-1A (2022.05) §15.4

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

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