Troubleshooting
27Fault 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 |
|---|---|---|
| Control panel display is blank | No power in the line. | Restore the power in the line. |
| Problems with cabling. | Check cabling; if the trouble persists, replace it. | |
| Problems with the electronic control board. | Check the electronic control board; if the trouble persists, replace it. | |
| The dryer is off. | Turn it on by pressing the ON/OFF switch for 1 second. | |
| Dryer in stand-by. | Wait 2 minutes after the dryer is switched on. | |
| Compressed air inlet/outlet inverted. | Check if the compressed air inlet/outlet is connected properly. | |
| The flow rate and/or temperature of the air entering the dryer are higher than the nominal values. | Restore the nominal conditions. | |
| The ambient temperature is higher than the nominal values. | Restore the nominal conditions. | |
| The condenser is dirty. | Clean the condenser. | |
| Condensate drain is not functioning. | Pic.3 Clean the condensate drainage | |
| The temperature control probe is positioned improperly or faulty. | Check the probe; if the trouble persists, replace it. | |
| Problems with cabling or with the electronic control board. | Check the cabling and the electronic control board, if the trouble persists, replace them. | |
| 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. | |
| Problems with the electrical components of the compressor. | Check the electrical components of the compressor. | |
| Defective compressor. | Replace the compressor. | |
| Fan pressure switch defective or burned out (if present). | Turn off the dryer and call your local Ingersoll Rand distributor. | |
| High pressure switch defective or burned out (if present). | Turn off the dryer and call your local Ingersoll Rand distributor. | |
| Gas leakage in the refrigerating circuit. | Turn off the dryer and call your local Ingersoll Rand distributor. | |
| Defective fan. | Replace the fan. | |
| Protection fuse burned out (if present). | Replace the fuse. | |
| 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. |
| Air flows continuously through the condensate drainage. | 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. | |
| Clean the mesh filter of the condensate drainage system. | Clean the mesh filter. | |
| Clean the condensate drainage system pre-filter. (Pic.3) | Replace the coil of the drainage solenoid valve if burned. Clean or replace the drainage solenoid valve if clogged/jammed. | |
| Gas leakage in the refrigerating circuit without load. | Turn off the dryer and call your local Ingersoll Rand distributor. |
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 manual
About
Ingersoll Rand D12IN — air compressor. Specifications and parts compiled from manufacturer documents.