Troubleshooting
17Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Motor will not start. | Main switch and fuses open, Starter magnetic coils open, Thermal overload tripped, Defective pressure switch-contacts will not close, Low voltage | Check all fuses and switches. Check for loose or faulty wires., Check overload relay in starter. Reset starter., Reset starter. If starter trips repeatedly, have electrical system inspected by an electrician., Repair or replace pressure switch. Warning – Relieve tank pressure before servicing., Check with voltmeter. Be sure voltage corresponds to unit specifications. |
| Starter trips repeatedly. | Improperly adjusted pressure switch, Faulty check valve, correct fuse size or magnetic starter coil | Adjust or replace. Warning – Relieve tank pressure before servicing., Clean or replace. Warning – Relieve tank pressure before servicing., Be sure that fuses and coils are properly rated. |
| Tank pressure builds up slowly. | Air leaks, Dirty air filter, Defective compressor valves | Tighten fittings., Clean or replace., Install new valves. |
| Tank pressure builds up quickly. | Excessive water in tank | Drain tank. |
| Discharge pressure relief valve pops off while compressor is running. | Wrong pr | |
| Compressor will not unload (Units with head unloaders) | Wrong pilot valve setting | Adjust to correct setting |
| Excessive belt wear | Pulley out of alignment | Realign motor pulley |
| Compressor runs hot | Improper flywheel rotation | Check for correct rotation (Counter clockwise when viewed from drive side) |
| Interstage pressure relief valve pops off | Defective compressor valves | Install new valves |
| Excessive oil consumption | Dirty air filter | Clean or replace |
| Air escapes from centrifugal unloader when unit is running | Centrifugal unloader release valve dirty or defective | Clean or replace valve |
| Air escapes from centrifugal unloader when unit is stopped | Check valve stuck in open position | Replace check valve |
| System does not alternate (Duplex units only) | Starter tripped | Reset starter. If starter trips repeatedly, have electrical system inspected by an electrician |
| Compressor does not start | Faulty electrical connection or low oil level | Check and secure all electrical connections. If the problem persists, check the oil level and add oil if necessary. |
| Excessive noise during operation | Loose belt or worn-out parts | Inspect and tighten the belt. Replace any worn-out parts as needed. |
| Reduced air output | Clogged air intake filter | Clean or replace the air intake filter. |
| High operating temperature | Insufficient lubrication or clogged oil cooler | Check and change the oil if necessary. Clean or replace the oil cooler as needed. |
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 ES — air compressor. Specifications and parts compiled from manufacturer documents.