Drive cooling fan
Common heat-related VFD and servo-drive failure point.
Hitachi WJ200 / WL200 Fault Codes
Hitachi WJ200 and WL200 drives are common on pumps, fans, and light machinery. Their fault list centers on current, voltage, thermal, and memory protection.
Common Hitachi Faults
| Fault | Meaning | Quick Fix |
|---|---|---|
| E01 | Overcurrent at constant speed | Check load and motor wiring |
| E02 | Overcurrent during decel | Lengthen decel time |
| E03 | Overcurrent during accel | Lengthen accel time |
| E05 | Overload protection | Check motor FLA and load |
| E07 | Overvoltage | Increase decel time |
| E08 | EEPROM/CPU fault | Power cycle, replace drive if persistent |
| E09 | Undervoltage | Check line voltage |
| E12 | External trip | Check fault input terminal |
| E13 | Ground fault | Test motor and leads |
| E14 | Overtemperature | Clean cooling path, check fan |
Need Replacement Parts?
Before ordering, match the drive part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
Best First Checks
- Inspect motor leads for insulation damage
- Verify nameplate motor data entered correctly
- Check if fault occurs on accel, decel, or run — that narrows the cause fast
- Clean the heatsink and fan path
Bottom Line
Hitachi faults usually tell you when in the motion profile the problem occurred. Use that clue — accel faults, decel faults, and run faults point to different fixes.