Atlas Copco XAHS 186 Dd troubleshooting: 26 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Atlas Copco XAHS 186 Dd — full specs, parts & maintenance.
| Code | Meaning |
|---|---|
| H3 | Indicación de carga |
| H5 | Temperatura de salida del motor alta |
| H6 | Presión de aceite baja |
| H7 | Fluido refrigerante insuficiente |
| Symptom | Cause | Remedy |
|---|---|---|
| Insufficient engine oil pressure. | Release button after engine oil pressure has built up above the minimum allowed level. Stop at once, consult the engine instruction manual. | |
| Fuel tank contains insufficient fuel. | Fill fuel tank. | |
| Compressor is loaded automatically to full capacity after starting. | Loading valve stuck in loading position.; Air intake throttle valve stuck in opened position.; Air leaks in regulating system. | Remove and dismantle loading valve. Correct if necessary.; Check and, if necessary consult Atlas Copco.; Check hoses and their fittings. Stop leaks; replace leaking hoses. |
| Unit does not load after pressing the loading button. | Regulating valve defective. | Check and if necessary consult Atlas Copco. |
| Engine does not speed up immediately after compressor loading valve button has been pressed and compressor does not deliver air. | Regulating valve defective.; Air intake throttle valve stuck in closed position. | Check and, if necessary consult Atlas Copco.; Check and, if necessary consult Atlas Copco. |
| Excessive compressor oil consumption. Oil mist being discharged from air outlet valves. | Compressor oil level too high. | Check oil level. Release pressure and drain oil to correct level. |
| Compressor capacity or pressure below normal. | Air consumption exceeds capacity of compressor.; Choked air filter elements.; Unloading valve not completely open. | Check equipment connected.; Remove and inspect elements.; Check and, if necessary consult Atlas Copco. |
| Compressor does not unload and engine keeps running at max. speed when closing the air outlet valves, safety valve blows. | Regulating valve incorrectly set or defective.; Air leaks in regulating system.; Unloading valve stuck. | Check and, if necessary consult Atlas Copco.; Check hoses and their fittings. Stop leaks and, if necessary consult Atlas Copco.; Check and, if necessary consult Atlas Copco. |
| Working pressure rises during operation and causes safety valve to blow. | Regulating valve incorrectly set or defective.; Air leaks in regulating system.; Unloading valve stuck.; Safety valve defective. | Check and, if necessary consult Atlas Copco.; Check hoses and their fittings. Stop leaks and, if necessary consult Atlas Copco.; Check and, if necessary consult Atlas Copco.; Check safety valve; consult Atlas Copco. |
| After working some time, the unit stops through a shutdown switch. | Fuel tank contains insufficient fuel.; Air in fuel system, or insufficient fuel supply.; Engine oil pressure too low.; Engine temperature too high.; Compressor temperature too high.; Low coolant level. | Fill fuel tank.; Check filters and hoses for leaks, dirt and bends.; Refer to the engine instruction manual.; See corrective actions 15.; See corrective actions 16.; Top up cooling system. |
| Air and oil mist expelles from air filters immediately after stopping. | Unloader valve jammed.; Wrong oil type (without foam-retarding additives). | Check and, if necessary consult Atlas Copco.; Consult Atlas Copco. |
| Engine overheating. | Insufficient engine cooling.; Engine oil cooler clogged externally. | Relocate compressor.; Clean engine oil cooler. Refer to section Cleaning coolers. |
| Compressor overheating. | Insufficient compressor cooling.; Oil cooler clogged externally.; Oil level too low. | Locate compressor away from walls; when banked with other compressors, leave space between them.; Clean oil cooler. Refer to section Cleaning coolers.; Check oil level. Top up with recommended oil. |
| After working for some time, the unit stops for no apparent reason. | Air in fuel system, or insufficient fuel supply. | Check filters and hoses for leaks, dirt and bends. |
| Starter motor does not crank engine after switching startbutton (S) to ””. | Low battery output | Check electrolyte level and charge battery. If no cells are shorted and battery is discharged, trace cause and correct. |
| Starter motor cranks engine when switching start button (S) to ””, but engine does not fire. | Low battery output | See corrective action 1. |
| Engine fires, but engine stops when releasing start button (S). | Alternator drive belt broken or slipping. Alternator/regulator defective | Check and correct if necessary. Have assembly repaired. |
| Hourmeter (P1) does not count running time. | Hourmeter (P1) defective | Replace. |
| Engine is running, but shuts down immediately after start button (S) has been released. | Start button (S) released too soon | |
| Air leaks in regulating system. | A. Remove and dismantle loading valve. Correct if necessary. b. Check and, if necessary consult Atlas Copco. c. Check hoses and their fittings. Stop leaks; replace leaking hoses. | |
| If any bearing play is perceivable, adjust the bearings. | Bearing play | Adjust the bearings. |
| Noticeable bearing play felt in compact bearings. | Compact bearings | Replace the compact bearings. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Loading valve stuck in loading position.; Air intake throttle valve stuck in opened position.; Air leaks in regulating system.. See the table for the matching fixes.
Documented causes: Regulating valve defective.. See the table for the matching fixes.
Documented causes: Regulating valve defective.; Air intake throttle valve stuck in closed position.. See the table for the matching fixes.