Troubleshooting
30Fault codes
| Code | Meaning | Remedy |
|---|---|---|
| D780-950IN-A | Phases connected incorrectly. | Connect the phases correctly. |
| D780-950IN-A | Intervetion of the high pressure switch. | Reset the high pressure switch |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Water in the system — control panel display is blank | No power in the line | Restore the power in the line |
| Water in the system — control panel display is blank (D780-950IN-A) | Phases connected incorrectly | Connect the phases correctly |
| Water in the system — control panel display is blank | Problems with cabling | Check cabling; if the trouble persists, replace it |
| Water in the system — control panel display is blank | Problems with the electronic control board | Check the electronic control board; if the trouble persists, replace it |
| Water in the system | The dryer is off | Turn it on by pressing the ON/OFF switch for 1 second |
| Water in the system | Dryer in stand-by | Wait 2 minutes after the dryer is switched on |
| Water in the system | Compressed air inlet/outlet inverted | Check if the compressed air inlet/outlet is connected properly |
| Water in the system | The flow rate and/or temperature of the air entering the dryer are higher than the nominal values | Restore the nominal conditions |
| Water in the system | The ambient temperature is higher than the nominal values | Restore the nominal conditions |
| Water in the system | The condenser is dirty | Clean the condenser |
| Water in the system | Condensate drain is not functioning (Pic.3) | Clean the condensate drainage system filter mesh; Replace the coil of the drainage solenoid valve if burned; Clean or replace the drainage solenoid valve if clogged/jammed; Check the C8 and C9 parameters of the electronic control board; if the trouble persists, replace it |
| Water in the system | Condensate drain is not functioning (Pic.4-5) | Check the no loss condensate drain; if the trouble persists, replace it |
| Water in the system | The temperature control probe is positioned improperly or faulty | Check the probe; if the trouble persists, replace it |
| Water in the system (D780-950IN-A) | Intervention of the high pressure switch | Reset the high pressure switch |
| Water in the system | Problems with cabling or with the electronic control board | Check the cabling and the electronic control board, if the trouble persists, replace them |
| Water in the system | Activation of compressor's internal thermal protection | Wait one hour and check again. If the fault persists: stop dryer and call your local Ingersoll Rand distributor |
| Water in the system | Problems with the electrical components of the compressor | Check the electrical components of the compressor |
| Water in the system | Defective compressor | Replace the compressor |
| Water in the system | Fan pressure switch defective or burned out (if present) | Turn off the dryer and call your local Ingersoll Rand distributor |
| Water in the system | High pressure switch defective or burned out (if present) | Turn off the dryer and call your local Ingersoll Rand distributor |
| Water in the system | Gas leakage in the refrigerating circuit | Turn off the dryer and call your local Ingersoll Rand distributor |
| Water in the system | Defective fan | Replace the fan |
| Water in the system | Protection fuse burned out (if present) | Replace the fuse |
| Water in the system | Gas leakage in the refrigerating circuit without load | Turn off the dryer and call your local Ingersoll Rand distributor |
| Water in the system | Series of alarms very close to each other | Call your local Ingersoll Rand distributor |
| Low pressure in the line | Ice formation in the evaporator | Check the probe; if the trouble persists, replace it; Check the electronic control board; if the trouble persists, replace it; Contact our Service Centre to check the gas charge |
| Low pressure in the line | Clog | Check if the compressed air inlet/outlet is connected properly; Check if the connecting tubing is clogged; in case proceed accordingly; Check if any valves are closed; Check the condition of any filter |
| Low pressure in the line | Air flows continuously through the condensate drainage (D12-480IN-A) | Drainage solenoid valve jammed, clean or replace it; D12-480IN-A. Verify the condensate drainage times set on the electronic control board (C8 and C9); D12-480IN-A. Check the signal from the control board: if it is continuous, replace the control board; D600-950IN-A. Check the no loss condensate drain; if the trouble persists, replace it |
Fault codes and symptom→remedy steps extracted from this unit’s service/owner documentation; verify against the official manual before servicing.
Available documents
Operator's manualReferenceParts manual
About
Ingersoll Rand D72IN — air compressor. Specifications and parts compiled from manufacturer documents.