Fault Codes / Carrier

36 codes

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• H5 — Persistent low pressure (3x P2 within 60 minutes).
• P0 — Inverter compressor top temperature protection.
• P1 — High pressure protection. Check for overcharge or dirty coils.
• P2 — Low pressure protection. Check for leaks or low refrigerant.
• P4 — Discharge temperature protection.
• P6 — Inverter module protection.
• P9 — DC fan protection. Check outdoor fan motor and wiring.

Aquasnap 30RB

• A1 — Master-slave configuration error.
• P0501 — Evaporator freeze protection: water temp too low.
• P0502 — Water circuit flow switch tripped.
• P3010 — Compressor contactor not closed / current fault.
• P3050 — Compressor 1 high pressure switch tripped.
• P3051 — Compressor 2 high pressure switch tripped.
• T101 — Entering water thermistor (EWT) fault.
• T102 — Leaving water thermistor (LWT) fault.

Pro-Dialog+ (30RB060-390)

• A1.01 — Compressor A1 motor temperature too high (PTC resistance > 4.5k Ω).
• A1.02 — Compressor A1 crankcase heater failure.
• A1.03 — Compressor A1 high pressure switch open.
• A1.04 — Compressor A1 motor sensor PTC out of range (< 50 Ω or > 17k Ω).
• P.15 — Condenser flow switch failure (heat reclaim units only).
• P.29 — Loss of communication with System Manager.
• P.30 — Master/Slave communication failure.
• P.31 — Unit is in Emergency Stop (CCN Emergency Stop received).
• P.32 — Cooler pump 1 fault (interlock circuit open).
• P.34 — Reclaim operation failure, Circuit A (due to high SCT).
• P.37 — Repeated high discharge gas overrides, Circuit A.
• P.40 — Repeated low suction temperature overrides, Circuit A.
• P.97 — Water exchanger temperature sensors swapped (entering < leaving for > 1 min. while a compressor runs).
• Pr.01 — Discharge transducer failure, Circuit A (0 vdc signal).
• Pr.04 — Suction transducer failure, Circuit A.
• Pr.07 — Reclaim pumpdown pressure transducer failure, Circuit A (heat reclaim units only).
• th.01 — Water exchanger entering fluid thermistor out of range (-40°C to 115.6°C).
• th.10 — Outdoor air temperature (OAT) thermistor failure, out of range.
• th.11 — Master/Slave common fluid thermistor out of range (Dual Chiller configuration only).
• th.18 — Condenser subcooling liquid thermistor out of range, Circuit A (heat reclaim units only).
• th.21 — Space temperature sensor failure (only when Space Temperature Reset is enabled).