58 Leroy-Somer generator fault/alarm codes with symptom, cause and remedy — compiled from Leroy-Somer service and controller documentation.
| Code | Meaning / symptom | Cause | Remedy |
|---|---|---|---|
| 00-1 | Generator set emergency stop | ||
| 01-1 | External emergency stop | ||
| 02-1 | Engine oil pressure | ||
| 03-1 | Engine water temperature | ||
| 04-1 | Daily fuel tank level low | ||
| 05-1 | Radiator water level low | ||
| 06-1 | Alternator overload or short-circuit | ||
| 07-1 | Engine overspeed | ||
| 08-1 | Max. battery voltage | ||
| 09-1 | Max. alternator voltage | ||
| 12-1 | Max. alternator frequency | ||
| 25-0 | Normal contactor open (system side) | ||
| 26-0 | Emergency contactor open (generating set side) | ||
| 27-1 | Oil temperature | ||
| 28-1 | Oil level low | ||
| 34-1 | Battery charger fault | ||
| 46-1 | Main circuit breaker open | ||
| 47-0 | Overload | ||
| AC.Lt | Drive is in current limit | See Menu 10 in the Digidrive SK Advanced User Guide | |
| br.rS | Braking resistor overload | See Menu 10 in the Digidrive SK Advanced User Guide | |
| C.Acc | SmartStick read/write fail | Bad connection or faulty SmartStick | |
| C.dAt | SmartStick data does not exist | New/empty SmartStick being read | Reset the drive. |
| C.Err | SmartStick data error | Bad connection or memory corrupt within SmartStick | |
| C.rtg | SmartStick/drive rating change | Already programmed SmartStick read by a drive of a different rating | |
| cL1 | Analog input 1 current mode, current loss — Input current less than 3mA when 4-20 or 20-4mA modes selected | ||
| EEF | Internal drive EEPROM trip — Possible loss of parameter values | Set default parameters (see Pr 29 on page 59) | |
| FAIL | Failed attempt to read stick | An attempt was made to read the stick when the drive was not disabled or tripped, or the stick is read only | |
| FdL | Field loss condition | ||
| HF06 | Unexpected interrupt | Hardware fault - return to supplier | |
| HF07 | Watchdog failure | Hardware fault - return to supplier | |
| HF08 | Interrupt clash | Hardware fault - return to supplier | |
| HF11 | Access to the EEPROM failed | Hardware fault - return to supplier | |
| HF17 | No comms from power processor | Hardware fault - return to supplier | |
| HF19 | Flash failure | Hardware fault - return to supplier | |
| HF21 | Power processor - Watchdog failure | Hardware fault - return to supplier | |
| HF22 | Power processor - Unexpected interrupt | Hardware fault - return to supplier | |
| HF23 | Power processor - Level overrun | Hardware fault - return to supplier | |
| HF24 | Power processor - No frequency at power up | Hardware fault - return to supplier | |
| HF29 | Fan fault | Hardware fault - return to supplier | |
| HFxx | Hardware faults | Internal drive hardware fault (see Digidrive SK Advanced User Guide) | |
| hot | Heatsink/IGBT temperature high | Reduce ambient temperature or reduce motor current | |
| It.AC | I2t on drive output current | Excessive mechanical load High impedance phase to phase or phase to ground short circuit at drive output | Drive requires re-autotuning to motor |
| It.br | I2t on braking resistor | Excessive braking resistor energy | |
| Motor thermistor trip | Excessive motor temperature | ||
| O.cL | Overload on current loop input | Input current exceeds 25mA | |
| O.ht1 | FXMP5 overheat (SCR junction) based on thermal model | Reduce ambient temperature or field current. Check the fans are operating and venting is not blocked. | |
| O.ht1 | IGBT over heat based on drives thermal model | Overheat software thermal model | |
| O.ht2 | Heatsink over temperature | Reduce ambient temperature or field current. Check the fans are operating and venting is not blocked. | |
| O.ht2 | Over heat based on drives heatsink | Heatsink temperature exceeds allowable maximum | |
| O.ht3 | Drive over-heat based on drive | ||
| O.ht4 | Power module rectifier over temperature. — Power module rectifier temperature exceeds allowable maximum | ||
| O.SPd | Over speed | Excessive motor speed (typically caused by mechanical load driving the motor) | |
| Oil pressure fault/shutdown | Red LED on | ||
| OV | DC bus over voltage | Deceleration rate set too fast for the inertia of the machine. Mechanical load driving the motor | |
| OVL.d | I x t overload (I = current, t = time) | Reduce motor current (Load) | |
| PH | Input phase imbalance or input phase loss — One of the input phases has become disconnected from the drive (not dual rated drives) | ||
| rS | Failure to measure motors stator resistance | Motor too small for drive; Motor cable disconnected during measurement | |
| SCL | Serial communications loss time-out — Loss of communication when drive is under remote control | ||
| tunE | Autotune stopped before completion | Run command removed before autotune complete | |
| UV | DC bus under voltage | Low AC supply voltage Low DC bus voltage when supplied by an external DC power supply |
Compiled from Leroy-Somer service manuals and controller documentation. 2 code numbers mean different things on different controllers; each meaning is listed with the models it applies to. Cause/remedy shown where extracted; always verify against the manual for your exact model.
Drive is in current limit. Remedy: See Menu 10 in the Digidrive SK Advanced User Guide.
Braking resistor overload. Remedy: See Menu 10 in the Digidrive SK Advanced User Guide.