Suggest you try the new firmware:
http://www.innosilicon.com/html/downA4/index.htmlA4+ and A5 share a update firmware. If the firmware build date is before 2017.11.24, you must upgrade through TF card. If the firmware build date is 2017.11.24 or later, you can upgrade on the webpage of the miner.Did you get any response from innosilicon? I have the same issue.
