The Qc1001 is a generator-set controller. It is used on generator sets from Atlas Copco, including the QAS 30, QAS 325 Volvo and QAS 38.
| Symptom | Cause | Remedy |
|---|---|---|
| After being excited alternator does not excite. | Connections are interrupted. | Check connection cables as per attached drawings. |
| Alternator does not excite. | Blown fuse. | Replace fuse. |
| Black exhaust smoke | Restriction in air filter/cleaner or induction system | |
| High fuel consumption | Restriction in air filter/cleaner or induction system | |
| High voltage at no load. | Voltage potentiometer out of setting. | Reset voltage. |
| Higher than rated voltage at load. | Voltage potentiometer out of setting. | Reset voltage potentiometer. |
| Low voltage at no load. | Voltage potentiometer out of setting. | Reset voltage. |
| Lower than rated voltage at load. | Voltage potentiometer out of setting. | Reset voltage potentiometer. |
| Misfire | Restriction in a fuel pipe | |
| Not enough power | Restriction in a fuel pipe | |
| The engine does not start or is difficult to start | Starter motor turns engine too slowly | |
| The pressure of the lubricating oil is too low | Wrong grade of lubricating oil | |
| The starter motor turns the engine too slowly | Battery capacity too low | |
| Unstable voltage. | Speed variation in engine. | Check regularity of rotation. |
Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Aggregated from the service documentation of generator sets built on this controller.