A generator or cylinder fault often appears first as a pressure error or a detector that will not ready. Check the cylinder pressure and that the changeover valve is on the live cylinder. Confirm the regulator outlet pressure matches what the instrument expects. Confirm the gas identity at the connection. Do not adapt a fitting to force a different gas onto an inlet.
Generator alarms for purity, water, or compressor shutdown should be cleared on the generator before you adjust the chromatograph. An exhausted moisture or hydrocarbon trap more often ruins the baseline than it removes all pressure. Replace traps on their service interval.
Call Mahut or the gas supplier if a regulator, a generator compressor, or a leak-shutdown will not reset. Do not open generator covers that are interlocked.