Error codes, description and troubleshooting for the H100 Spindle kit found on LongMill and AltMill
| Fault Display | Fault Description | Issue | Fix |
E.oc | Overcurrent during running | 1. Inspect whether the motor is in short circuit/ partial short circuit and the insulation of output line is in good condition 2. Inspect whether the motor is locked and mechanical load changes abruptly 3. Extend acceleration time or deceleration time 4. Reducing torque boost value 5. Whether network voltage changes abruptly 6. DC braking amount is too large, so reduce it 7. Unreasonable inverter configuration, increase the capacity of inverter | 1. Ensure the Spindle can rotate freely without issue 2. Unplug the VFD from the power supply. Wait till LCD screen is blank. Plug VFD back in to reset. |
E.ou | Overvoltage during running | 1. Extend deceleration time or install brake resistor 2. Whether network voltage changes abruptly | 1. Unplug the VFD from the power supply. Wait till LCD screen is blank. Plug VFD back in to reset. |
E.Lu | Variable frequency low voltage | 1: Inspect network voltage 2: Send for repair | 1. Make sure you are providing 220V power to the VFD 2. Turn OFF/ON the transformer and check plug location, if you are using one 3. Electrical issue on the VFD, issue replacement.
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E.oH | Inverter overheating | 1: Inspect whether the fan is locked and radiating fin is free of foreign matter 2: Whether ambient temperature is normal 3: Whether there is air space enough for air convection 4: Inspect whether the thermistor and connecting line are in open circuit | |
E.rHo | Ground fault | Replace entire spindle VFD system. | |
| Abnormal internal communication of inverter | Replace VFD unit | ||