Hi Momen,
The log level console messages are disabled by i5SPCChart js library. You could however turn on the log messages by toggling the flag which controls this by using the below line of code:
com.sap.xmii.common.util.DEBUG_MODE_ON = true;
This line should be called before the i5SPCChart constructor call.
Alternatively, you could also use console.debug if it suffices.
Thanks and Best Regards,
Ria