| Fault Code | Display on Keypad | Meaning | Likely Fix (per manual) | | :--- | :--- | :--- | :--- | | | Overcurrent | Short in motor or cables | Check insulation resistance. Increase C1-01 (accel time). | | ov | Overvoltage | Deceleration too fast | Increase C1-02 (decel time). Install braking resistor (check manual section 3.9). | | UV1 | Undervoltage | Input power dip or phase loss | Check incoming fuses. Measure L1-L2-L3 voltage. | | HE | Heatsink Overheat | Clogged fan or high ambient | Clean cooling fins. Check if F4-01 (fan life) is at end. | | bUS | Option Communication Error | Modbus/network disconnected | Check wiring on terminals R+/R-. Cycle power on controller. | | STo | Safe Torque Off | Safety circuit open | Check terminals H1-HC and H2-HC for 24V signal. |
Ignoring the section.
Check motor insulation, increase acceleration time (C1-01), and inspect the driven machinery for mechanical binds. oV (Overvoltage) yaskawa k1000 manual
The drive has a vector control option enabled by mistake. Set A1-02 (Control Method) to 0 (V/f control for fans/pumps) or 2 (Open Loop Vector for HVAC).
Parameters for setting up external braking resistors for superior torque control. | Fault Code | Display on Keypad |
Best for basic wiring and getting a motor spinning quickly.
Multi-function programmable inputs for forward/reverse run, multi-step speed selection, and external faults. Install braking resistor (check manual section 3
Bookmark the fault code chapter, tab the parameter list, and never guess a wire connection again.
The K1000 supports a special input that ignores all faults (except short-circuit) and runs the fan at full speed during a fire. See parameters H1-xx set to 75 (Fire Mode).
Below is a comprehensive guide based on the , which is the most common industrial application of that specific name.
Current leaking to the earth ground was detected on the output side of the drive.