We sum up the scenarios below where you might notice that the Bitmain Antminer D7 fans aren’t working properly.
Scenario No.1——the Fan Speed is Too Low
Cause analysis and treatment methods
1. replace the corresponding position of the fan, test whether the fan is damaged, if the fan is damaged, you need to replace the fan.
2. Replace the control board if the issue still persists after replacing the fan, or send the device back to the manufacturer for repair, if possible.
Scenario No.2——the Fan Speed Exceeds 10000
Cause analysis and treatment methods
1. Fan damage: replace the fan or have it repaired at the factory.
Scenario No.3——fans Are Missing in the Miner Status
A fatal error message reading “some fans lost or fan speed low” appears when there are not enough fans in the runtime interface or when viewing the background log.
How to copy Kernel Log into text form？
Cause analysis and processing methods
1. check the interface or log can detect the fan If you know which fan has stopped working by its number, you can locate it. Then, if it has been physically damaged, you can replace the fan and examine the appearance of the connection line.
2. check whether the control board connected to the fan port is damaged, if damaged, the control board can be replaced or returned to the factory for repair.
3. test whether the fan is damaged, if damaged, replace the fan.
Scenario No.4——more Than a Normal Amount of Fans Are Detected
There ought to be two fans visible in the Bitmain Antminer D7 status, but there are usually three or more.
If you encounter any one of the above scenarios, please follow the troubleshooting steps as below,
1. Each fan should be replaced in turn, and each time, check to see if the display returns to normal.
2. Replaced fans that still display three fans indicate that the control board is damaged; take it back to the manufacturer for service.
