Eliwell AH1

Critical

IDPlus 961/974 — High temperature alarm on Pb1 (too warm).

Eliwell AH1: High temperature alarm on Pb1 (too warm). This fault typically halts operation and needs immediate attention.

Possible causes

Door open / high load.
Defrost too long / icing.
Dirty condenser / low refrigerant.

Check steps

Check door/load.
Check evaporator for icing.
Check condenser & charge.

Affected parts

Verdampferlüfter
Kältemittel

Safety note

Food safety — document temperature (HACCP).

Source: Eliwell resmi servis kılavuzu — Eliwell IDPlus 902/961/971/974 User Manual, code 9IS54157, rel. 03/16, p.16 ALARMS table (also confirmed in IDPlus 961-974-HC manual 9IS54671.00, rel. 10/18, p.20): 'AH1 | Alarm for HIGH Pb1 temperature | value read by Pb1 > HAL after time of "tAO" | Recording of label AH1 in fol…

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

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Related fault codes

Probe Pb1 (cold room) fault — alarms disabled.E1 Probe Pb2 (evaporator/defrost) fault.E2 Low temperature alarm on Pb1 (too cold).AL1 External alarm (via digital input).EA Defrost ended by timeout.Ad2 Open door alarm.OPd