Studio R LEDs 1,2 & 3 flashing red 4 steady blue

Have a G-Speed studio R, all drives test okay out of the RAID but getting Drive LED’s 1,2 & 3 flashing red, nr 4 is blue. Where can I find error codes? I think the RAID hardware may have failed.
Have tried a factory reset but not luck.

Data from this unit is stored elsewhere so data loss is not an issue. I’d just like to use the drive again.

Thanks in advance. Mike