Troubleshooting
21Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Switch failure | Test the switches. | |
| High compressor oil temperature | Check the compressor oil level and oil cooler. Check the fan drive. | |
| Water present in fuel system | Check the water separator and clean if required. | |
| Engine overheats | Reduced cooling air from fan. Check the fan and the drive belts. Check for any obstruction inside the cowl. | |
| Engine speed too high | Incorrect throttle arm setting. Check the engine speed setting. | |
| Engine speed too low | Incorrect throttle arm setting. Check the throttle setting. | |
| Blocked fuel filter | Check and replace if necessary. | |
| Blocked air filter | Check and replace the element if necessary. | |
| Premature unloading | Check the regulation and the operation of the air cylinder. | |
| Excessive vibration | Engine speed too low. See 'Engine speed too low' | |
| Leaking oil seal | Improperly fitted oil seal. Replace the oil seal. Refer also to the Engine Manufacturer’s Manual. | |
| Air discharge capacity too low | Engine speed too low. Check the air cylinder and air filter(s). | |
| Blocked scavenge line | Check the scavenge line, drop tube and orifice. Clean and replace. | |
| Perforated separator element | Replace the separator element. | |
| Pressure in system is too low | Check the minimum pressure valve or sonic orifice. | |
| Safety valve operates | Operating pressure too high. Check the setting and operation of the regulator valve piping. | |
| Engine fails to start. | Low battery charge. | Check the fan belt tension, battery and cable connections. |
| Engine starts but b t | Electrical fault. | Test the electrical circuits. |
| Low engine oil pressure. | Check the oil level and the oil filter(s). | |
| Safety shut-down system in operation. | Check the safety shut-down switches. | |
| Fuel starvation. | Check the fuel level and fuel system components. Replace the fuel filter if necessary. |
Fault codes and symptom→remedy steps extracted from this unit’s service/owner documentation; verify against the official manual before servicing.
Available documents
Service manual
About
Ingersoll Rand P90 — air compressor. Specifications and parts compiled from manufacturer documents.