Fault Codes / Daikin / EC

DAI

Daikin EC

High

Altherma — DHW tank temperature abnormally high.

Daikin EC: DHW tank temperature abnormally high. This fault noticeably affects operation.

Possible causes

Tank sensor faulty.
Booster/heater not switching off.

Check steps

Check tank thermistor.
Check booster control/relay.

Affected parts

Speicher-Thermistor
Booster-Heizung (BSH)

Safety note

Hot water — scald risk.

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.

Look up in Enthalio →

Related fault codes

Outdoor unit: PCB defect.E1 Power supply malfunction / brief power failureU2 Transmission malfunction indoor/outdoor unit.U4 Water flow malfunction – flow too low.7H Inverter compressor overload or overheat.E5 Abnormal discharge pipe temperature.F3