1. Power Repair Test Firmware Instructions:
Firmware: whatsminer-test power-20220420.bin
PSU scope of use: P21, P21D, P21E, P221C, P222C, P221B, P222B
Control board type: H3, H6OS, H616
Tool：whatsminer tool 8.1.30
Scan to control board IP via whatsminer tools 8.1.30, check the IP, click ‘upgrade’-‘select file’-‘star upgrade.’
After the upgrade is successful, check the version information and confirm that the ‘version info’ is changed to 20220420.
Connect the PSU to the control board, and plug the network cable.
Power on the PSU and check the voltage.
6. Power off:
Change to the next PSU, which need to be tested, then repeat item 4-5.