Drives (VFDs)
Yaskawa V1000 VFD fault codes
What all 15 Yaskawa V1000 VFD fault codes mean, in plain words, with a risk grade for each. These come from the manufacturer's own manual. The fix for each one is in WERCS Diagnose.
Get the fixes · plans from $49/moUpdated July 22, 2026
| Code | What it means | Risk |
|---|---|---|
| CE | CE MEMOBUS/Modbus Communication Error The drive stopped because it did not receive control data over the communication network within the required time. | YELLOW |
| GF | GF Ground Fault The drive stopped the motor because it detected a severe ground fault on its output side. | RED |
| LF | LF Output Phase Loss The drive stopped the motor because it detected a missing power phase on its output side. | YELLOW |
| PF | PF Input Phase Loss The drive stopped because it detected a missing input power phase or a large voltage imbalance. | YELLOW |
| SC | SC IGBT Short Circuit The drive stopped operating because it detected a short circuit in its internal power components. | RED |
| oC | oC Overcurrent The drive stopped the motor because its sensors detected an output current exceeding the maximum limit. | YELLOW |
| oH | oH Heatsink Overheat The drive stopped because its internal heatsink temperature exceeded the maximum programmed limit. | YELLOW |
| oV | oV Overvoltage The drive stopped because its internal DC bus voltage exceeded the maximum safe detection level. | YELLOW |
| rr | rr Dynamic Braking Transistor The drive stopped because its internal dynamic braking transistor failed during operation. | YELLOW |
| Uv1 | Uv1 DC Bus Undervoltage The drive stopped operating because its internal DC bus voltage fell below the minimum required level. | YELLOW |
| bUS | bUS Option Communication Error The drive lost its option card communication connection after establishing it, which stops the equipment. | YELLOW |
| oH1 | oH1 Overheat 1 (Heatsink Overheat) The drive shut down because its heatsink temperature severely exceeded the maximum safe operating limit. | YELLOW |
| oL1 | oL1 Motor Overload The drive stopped the motor because the internal electrothermal sensor tripped the overload protection. | YELLOW |
| oL2 | oL2 Drive Overload The drive stopped operating because its internal thermal sensor triggered the overload protection. | YELLOW |
| oL3 | oL3 Overtorque Detection 1 The drive stopped the motor because the output current exceeded the programmed torque limit for too long. | YELLOW |
Every code comes from the manufacturer's own manual. Subscribers see which manual and page.