Measure the voltage at H1 and H2 relative to HC when the safety circuit is energized. Both should read the exact same voltage (typically 24 VDC). Step 4: Verify Safety Relay Performance
If the error persists, the fault likely lies within the main SERVOPACK or inverter unit itself, necessitating repair or replacement of the drive. Conclusion
Given the "H66" label, also inspect settings in the H6 parameter group (pulse train input/output), especially: yaskawa error code h66
Follow these steps in order to diagnose and resolve the fault. Step 1: Perform a Power Cycle
Open the drive cover and verify that the communication option card is firmly and correctly seated into its designated slot. Tighten any retention screws. Measure the voltage at H1 and H2 relative
In the ecosystem of Yaskawa AC drives (like the H1000, A1000, or V1000), error codes are categorized by their severity and origin:
Use a multimeter to measure the AC voltage across all three input phases (L1-L2, L2-L3, L1-L3). The readings should be roughly equal and within the drive's rated specifications. Inspect Connections: Conclusion Given the "H66" label, also inspect settings
Terminals at the input of the drive or at the main power source may have vibrated loose over time. Blown Fuses:
or a related temperature fault. This code is most commonly associated with older Yaskawa inverter series like the GPD 506/P5 GPD 515/G5 Yaskawa America Understanding the H66 Error