Applicable Systems
GA700
GA500
A1000
V1000
J1000
Symptoms
Yaskawa GA700 drive reports fault during normal operation indicating drive or motor issue requiring diagnostic evaluation.
Possible Causes
- Motor overcurrent detection at 200% rated for more than 0.5 seconds
- Encoder signal cable disconnection detected by feedback monitoring
- Drive control power supply voltage drop below specification
- Motor protection function calculated overload based on thermal model
Troubleshooting Steps
- Step 1: Read fault code on GA700 digital operator display
Fault code and description shown on LED display - Step 2: Check encoder cable connection at drive and motor
Encoder cable firmly connected with no bent pins - Step 3: Measure control power supply voltage at terminal
Control power voltage within 24VDC +/- 10% specification - Step 4: Verify motor nameplate parameters in drive settings
Motor FLA, voltage, and frequency match nameplate values
How to Reset
Reset by: 1) Correct the fault condition. 2) Press RESET on digital operator. 3) Run test. 4) Verify normal operation.
Common Replacement Parts
- GA700-CTL-01: Yaskawa GA700 control board (Verify model and voltage class)
Frequently Asked Questions
- Q: How often should motor nameplate parameters be verified?
Motor nameplate parameters should be verified during commissioning and after any motor replacement. Incorrect parameters cause the thermal model to calculate incorrectly, leading to either nuisance trips or insufficient motor protection.
Source: Yaskawa GA700 Technical Manual
Category: Electrical