ABB GC Alarm Codes (Shared)
Carrier / Pressure / Flow
Symptoms: No peaks, unstable baseline, retention time shifts.
First checks: Carrier cylinder pressure, regulator stability, leaks, pressure hunting.
Oven / Temperature
Symptoms: Oven not ready, heater fault, drift or repeatability issues.
First checks: Setpoint vs actual temperature, heater power, sensor integrity, airflow.
Valve / Sequence
Symptoms: Injection failure, stuck valve, sequence timing faults.
First checks: Instrument air, solenoids, valve actuation, method timing.
Communication / DCS
Symptoms: Stale values, bad quality flags, missing updates.
First checks: IP/network, protocol service, mapping, update cycle timing.