Code GF: Ground Fault
Issue Description & Safety Warning
The Yaskawa V1000 AC Drive has triggered a critical Ground Fault alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Code type: Fault Manual section: Yaskawa V1000 Troubleshooting Motor insulation is damaged. - Check the insulation resistance of the motor. - Replace the motor. A damaged motor cable is creating a short circuit. - Check the motor cable. - Remove the short circuit and turn the power back on. - Check the resistance between the cable and the ground terminal. - Replace the cable. The leakage current at the drive output is too high. - Reduce the carrier frequency. - Reduce the amount of stray capacitance. The drive started to run during Current Offset Fault or while coasting to a stop. - The value set exceeds the allowable setting range while the drive automatically adjusts the current offset (this happens only attempting to restart a PM motor that is coasting to stop). - Enable Speed Search at start (b3-01 = 1). - Perform Speed Search 1 or 2 (H1-oo = 61 or 62) via one of the external terminals. Note: Speed Search 1 and 2 are the same when using OLV/PM control mode. Hardware problem. - Replace the drive.
Source: Yaskawa AC Drive V1000 Compact Vector Control Drive Technical Manual (SIEP C710606 19D)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Yaskawa V1000 AC Drive Alarms
Yaskawa controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code GF on the V1000 AC Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Yaskawa's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 153 Yaskawa V1000 AC Drive codes.
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