Yaskawa VFD Parameter Codes Explained
Search Yaskawa VFD HVAC Drive GA500 parameter, setup, readout, warning and alarm codes such as A1-02, E2-01, C1-02, H1-01, U1-03, oC, ov and oL1.
⚠️ Practical note: Yaskawa VFD drives use grouped parameter numbers like E2-01 Motor Current and alarm numbers like ov DC Overvoltage. This page is a technician-friendly lookup based on the GA500 Programming Guide. Always verify the exact drive model, software version and safety condition before editing a live drive.
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| Code | Full name | Category | Meaning | Field tip |
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Most useful Yaskawa GA500 startup parameters
For basic GA500 commissioning, start with the control method, command source, frequency reference, ramps and motor data.
- A1-02 control method selection
- b1-01 frequency reference selection
- b1-02 run command selection
- C1-01 acceleration time and C1-02 deceleration time
- E2-01 motor rated current
- H1-01 digital input terminal function
Yaskawa parameters vs faults
Parameter codes like b1-01 are settings or readouts grouped by function. Fault displays like oC, ov and Uv1 are diagnostic messages. For repeated trips, record the fault, load condition and speed before resetting again.
What is a Yaskawa VFD parameter code?
A Yaskawa VFD parameter code is a grouped number used to identify a drive setting or readout. For example, E2-01 is motor current, while GF is a motor current readout.
Why Yaskawa codes look different from Schneider, ABB and Siemens
The function is often similar, but the code format is brand-specific. Schneider Altivar uses short text codes like nCr, ABB uses group numbers like 99.06, Siemens uses p0305, and Yaskawa VFD uses codes like E2-01.
❓ Frequently Asked Questions
E2-01 is Motor Current. Enter the nominal motor current from the motor nameplate. It is used for torque calculation and motor overload protection.
C1-02 is Automatic Motor Adaptation. It lets the drive measure/optimize motor parameters after the correct motor nameplate data is entered.
ov is DC Overvoltage. It often appears during fast deceleration, regenerative load, high mains voltage, or braking setup issues.
oL1 means overcurrent. Check motor/cable short circuit, ground fault, acceleration time, motor data, current limit, mechanical jam and load condition before resetting repeatedly.
Check digital input parameters such as oC terminal 18, 5-12 terminal 27, 5-13 terminal 29, plus the wiring examples for start/stop, pulse start/stop and speed up/down.