Error message

8A50 Inverter not ready %.2s

Cause of error

- Power-on of the drive not possible, because an inverter is not ready (RDY signal).
- No pulse release, 24 V is missing on the terminal X71 or X72
- On interface PCBs for Siemens inverters, the second axis is not enabled
- Compact inverter, inverter supply unit or power module is defective
- Interruption at inverter bus cable (supply bus, unit bus, PWM bus)
- Defective PWM interface on the control

Error correction

- Correct the defect in the pulse inhibitor on power supply module UV, X71/72
- Replace the defective compact inverter, supply unit or power module
- Replace the defective cable
- Inform your service agency