Troubleshooting
29Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Out of Level >15 degrees | Relocate or reposition unit. | |
| Ambient Temp. >125×F (52×C) | Above spec limit. | |
| Loose Wire Connection | Repair or replace. | |
| Broken Engine Fan Belt | Replace fan belt set. | |
| Malfunctioning Circuit Board | Replace circuit board. | |
| Low Oil Level | Add oil. | |
| Clogged Oil Filter Element(s) | Replace element(s). | |
| Wrong Lube Oil | See Engine Oil Spec. Change oil. | |
| Engine Malfunctioning | See Trouble Shooting in Engine Section. | |
| Bulb Burned Out | Replace circuit board. | |
| Shorted Wire (Hot) | Repair short. | |
| Low Battery Voltage | Check electrolyte level. Add if necessary. | |
| Loose or Broken Belts | Tighten or replace belt set. | |
| Unit Shutdown | Out of Fuel, Compressor Oil Level Too Low, Compressor Oil Temp. Too High, Engine Water Temp. Too High, Loose Wire Connection, Low Fuel Level Shutdown Switch, Defective Discharge Air Temp. Switch, Defective Engine Oil Pressure Switch, Broken Engine Fan Belt, Engine Oil Pressure Too Low, Defective Shutdown Solenoid, Malfunctioning Relay, Blown Fuse, * < 10 Volts at Shutdown Solenoid | Add CLEAN diesel Fuel, Add correct oil, See Table 10, Check coolant level. If necessary, Add., Wiggle wires at switches & connector blocks. Make repairs., Replace switch., Replace switch., Replace switch., Replace fan belt., See Table 3 and Table 4., Replace solenoid., Replace relay., Replace fuse/Check for Short., Check battery and alternator. Make repairs. |
| Won’t Start/Run | Out of Fuel, Clogged Fuel Filters, Compressor Oil Level Too Low, Loose Wire Connection, Low Battery Voltage, * < 10 Volts at Shutdown Solenoid, Engine Malfunctioning, Airend Malfunctioning | Add CLEAN diesel Fuel, Service filters., Add corrected oil, Repair or replace connection., Check electrolyte level. Check connections., Charge battery and alternator. Make repairs., See Trouble Shooting in Engine Section., See Table 10. |
| Engine Temperature Lamps Stays On | Defective Shutdown Solenoid, Defective Engine Temp. Switch, Defective Separator Tank Temp Switch, Defective Low Fuel Shutdown Switch, Malfunctioning Relay, Engine Malfunctioning, Airend Malfunctioning | Replace solenoid., Replace Switch, Replace Switch, Replace Switch, Replace relay., See Trouble Shooting in Engine Section., See Table 10. |
| Engine Oil Pressure Lamp Stays On | Defective Shutdown Solenoid, Defective Engine Temp. Switch, Defective Separator Tank Temp Switch, Defective Low Fuel Shutdown Switch, Malfunctioning Relay, Engine Malfunctioning, Airend Malfunctioning | Replace solenoid., Replace Switch, Replace Switch, Replace Switch, Replace relay., See Trouble Shooting in Engine Section., See Table 10. |
| Engine Temperature Lamps Stays Off | Defective Shutdown Solenoid, Defective Engine Temp. Switch, Defective Separator Tank Temp Switch, Defective Low Fuel Shutdown Switch, Malfunctioning Relay, Engine Malfunctioning, Airend Malfunctioning | Replace solenoid., Replace Switch, Replace Switch, Replace Switch, Replace relay., See Trouble Shooting in Engine Section., See Table 10. |
| Engine Oil Pressure Lamp Stays Off | Defective Shutdown Solenoid, Defective Engine Temp. Switch, Defective Separator Tank Temp Switch, Defective Low Fuel Shutdown Switch, Malfunctioning Relay, Engine Malfunctioning, Airend Malfunctioning | Replace solenoid., Replace Switch, Replace Switch, Replace Switch, Replace relay., See Trouble Shooting in Engine Section., See Table 10. |
| Operating Pressure Too High | Reduce pressure to spec limit. | |
| Incorrect Pressure Regulator Adjustment | Refer to Section 6 in this manual. | |
| Malfunctioning Pressure Regulator | Replace regulator. | |
| Leak In Regulator Piping | Repair leak(s). | |
| Malfunctioning Inlet Unloader | Inspect valve. Repair/Replace. | |
| Defective Separator Element | Remove element. Install new. | |
| Defective Safety Valve | Replace safety valve. | |
| Ice in Regulation Lines/Orifice | Remove ice. | |
| Incorrect Stopping Procedure | Read Procedure in this manual. | |
| Malfunctioning Unloader | Repair/Replace. |
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 P175 — air compressor. Specifications and parts compiled from manufacturer documents.