There is a communication error between the NC and amplifier due to improper setup or connection. The manual's first action is: “Check whether there is any abnormality in the following : Cable (Are there any broken wires?), Cable shield ground, Connector connections, Mounting state of the amplifier. Contact the nearest service center.”
- Model
- Mitsubishi Electric 600M Series
- Display shows
- SV commu err: Ax No/type illegal (SY0021)
- Type
- Error code
- Source
- Manual p. 466
What SY0021 means
SV commu err: Ax No/type illegal p. 466
Common causes
- There is an error in the communication between the NC and amplifier. p. 466
What to do
- Check whether there is any abnormality in the following : Cable (Are there any broken wires?), Cable shield ground, Connector connections, Mounting state of the amplifier. Contact the nearest service center. p. 466
Before you service the product, read the safety instructions in the manual p. 4.
If SY0021 is still not resolved
This page summarises what the manufacturer’s manual says about SY0021; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Mitsubishi Electric. Found a mistake? Report an error.