49 Atlas Copco generator fault/alarm codes with symptom, cause and remedy — compiled from Atlas Copco service and controller documentation.
| Code | Meaning / symptom | Cause | Remedy |
|---|---|---|---|
| 18 | Engine coolant temperature input voltage high | ||
| 19 | Engine coolant temperature input voltage low | ||
| 21 | Sensor supply voltage high | ||
| 22 | Sensor supply voltage low | ||
| 23 | Engine oil pressure input voltage high | ||
| 24 | Engine oil pressure input voltage low | ||
| Blink 26 | Manifold air temperature input voltage low | ||
| Blink 28 | ECU error | ||
| Blink 32 | When reading blink codes, signifies start of active fault codes | ||
| Blink 33 | When reading blink codes, signifies start of stored fault codes | ||
| Blink 37 | Fuel temperature input voltage high | ||
| Blink 38 | Fuel temperature input voltage low | ||
| Blink 39 | Crank position input error | ||
| Blink 42 | Engine over speed moderate or extreme | ||
| Blink 54 | ECU power down error | ||
| Blink 62 | Engine coolant temperature high - least severe | ||
| Blink 63 | Engine coolant temperature high - moderately severe | ||
| Blink 64 | Engine oil pressure moderately low | ||
| Blink 65 | Engine oil pressure extremely low | ||
| Blink 66 | Manifold air temperature moderately high | ||
| Blink 68 | Fuel de-rate | ||
| Blink 69 | Engine coolant temperature high – most severe | ||
| Blink 71 | Pump control valve closure too long | ||
| Blink 72 | Pump control valve closure too short | ||
| Blink 73 | Pump solenoid circuit open | ||
| Blink 74 | Pump solenoid circuit severely shorted | ||
| Blink 75 | Pump control valve closure not detected | ||
| Blink 76 | Pump solenoid circuit moderately shorted | ||
| Blink 77 | Pump solenoid current high | ||
| Blink 78 | Security violation | ||
| Blink 79 | Internal ECU error | ||
| Blink 81 | Fuel temperature moderately high | ||
| Blink 82 | Engine protection shutdown | ||
| Blink 83 | Auxiliary engine shutdown switch active | ||
| Blink 88 | When reading blink codes, signifies no fault codes in buffer | ||
| Blown fuse | Alternator does not excite. | Replace fuse. | |
| Blown fuse. | Alternator does not excite | Insufficient residual voltage. Increase the speed by 15 %. No residual voltage. | Replace fuse. |
| Check rpm | Intervention of protection. | Winding failure. | Check windings. |
| Connections are interrupted. | After being excited alternator does not excite | Check connection cables as per attached drawings. | |
| H3 | Indicación de carga | ||
| H5 | Temperatura de salida del motor alta | ||
| H6 | Presión de aceite baja | ||
| H7 | Fluido refrigerante insuficiente | ||
| Increase the speed by 15 % | Insufficient residual voltage. | ||
| Intervention by protection. | Higher than rated voltage at load | ||
| PEP | PROBLEMES MECANIQUES | ||
| Reset voltage | Low voltage at no load. | Voltage potentiometer out of setting. | |
| Reset voltage potentiometer. | Lower than rated voltage at load. | ||
| Substitute regulator. | High voltage at no load. | Voltage potentiometer out of setting. |
Compiled from Atlas Copco service manuals and controller documentation. Cause/remedy shown where extracted; always verify against the manual for your exact model.