Which machines are you running? Are their flagship S17s also experiencing this problem?
S9s don't have this game-over problem with sensor errors in later firmware... wtf is up with bitmain, they are literally creating problems for miners.
Adding a fourth problem:
2020-02-02 15:38:53 power_api.c:91:get_average_voltage: error: total_chain get 0 !!
2020-02-02 15:38:53 power_api.c:109:check_voltage: target_vol = 17.90, actural_vol = 0.00, more than 0.5v diff.
2020-02-02 15:38:54 driver-btm-api.c:141:stop_mining: stop mining: power set failed!
2020-02-02 15:38:54 thread.c:832:cancel_check_miner_status_thread: cancel thread
2020-02-02 15:38:54 thread.c:806:cancel_temperature_monitor_thread: cancel thread
2020-02-02 15:38:54 thread.c:816:cancel_read_nonce_reg_thread: cancel thread
2020-02-02 15:38:54 driver-btm-api.c:127:killall_hashboard: ****power off hashboard****
Remedy is to reboot the machine remotely, thus far.