0: No fault
1–3: Reserved
4: Overcurrent at acceleration (OC1)
5: Overcurrent at deceleration (OC2)
6: Overcurrent at constant speed (OC3)
7: Overvoltage at acceleration (OV1)
8: Overvoltage at deceleration (OV2)
9: Overvoltage at constant speed (OV3)
10: Bus undervoltage fault (UV)
11: Motor overload (OL1)
12: VFD overload (OL2)
13: Phase loss on input side (SPI)
14: Phase loss on output side (SPO)
15: Rectifier module overheating (OH1)
16: Inverter module overheating (OH2)
17: External fault (EF)
18: RS485 communication fault (CE)