CARR

Carrier A1.04

Critical

Pro-Dialog+ (30RB060-390) — Compressor A1 motor sensor PTC out of range (< 50 Ω or > 17k Ω).

Carrier A1.04: Compressor A1 motor sensor PTC out of range (< 50 Ω or > 17k Ω). This fault typically halts operation and needs immediate attention.

Possible causes

PTC sensor faulty or wiring open/shorted.

Check steps

Measure PTC sensor resistance and wiring.

Affected parts

PTC-Fühler

Safety note

Manual reset required.

Source: Carrier AquaSnap 30RB060-390 Pro-Dialog+ Controls, Start-Up, Operation, Service and Troubleshooting Instructions (Form 30RB-7T), Table 46 Alarm Codes + alarm descriptions, p.63-78

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

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