| < 4.75 mA / > 5.25 mA | < 475 mV / > 525 mV | RSR123 not adjusted | Adjust RSR123 |
| | RSR123 mounted incorrectly | Mount RSR123 |
| | RSR123 damped (traversed) | Mount RSR123 correctly |
| < 3.75 mA / > 5.5 mA | Alternating < 375 mV / > 550 mV | RSR123 has dropped off the rail | Check mounting, interrupt power, adjust again |
| | Adjustment failed | Check mounting, interrupt power, adjust again |
| | Occupancy detection failed | Check mounting, interrupt power, adjust again |
| | Overcurrent detection failed | Check mounting, interrupt power, adjust again |
| | RSR123 defective | Replace RSR123 |
| > 6 mA | > 600 mV | Wire short-circuit (1↔2 or 3↔4) | Rectify short-circuit |
| | RSR123 connected incorrectly | Connect RSR123 correctly |
| 0 mA | 0 mV | Wire break (1,2,3,4) | Check cabling and connections |
| | No RSR123 connected | Connect RSR123 |
