Guide for troubleshooting the Controller & Fan of the Antminer

If you are facing some issues with the fans or the controller of the Antminer, you can use this troubleshooting guide. We will share the possible reasons for the different problems and their solution.

 

Unable to Access the Configuration Page

 

Sometimes, you may find it difficult to access the configuration page of the miner. The possible and their fixes are listed below.

  1. Software issue in the miner – You can go for a reset in the case of any software issues. You can use the software reset at first. Then, if it is not working, go for a hardware reset.
  2. Browser Compatibility issues – Sometimes, the internet browser that you are using may have some compatibility issues. For example, if you are using the Internet Explorer browser and face any problems, try switching to the Google Chrome browser and see if the issue is getting resolved.
  3. Issue with the IP address – Sometimes, you may have one static IP address and one dynamic IP address. In such scenarios, go ahead and set both the IP addresses as static. You need to find the Ip addresses prior to that.
  4. Repeating MAC – This issue can be seen on Antminer models T9+ and S9i. If you see any repeated MAC issues, upgrade the firmware of the miner.
  5. Issue caused due to shifting in the location of the miner – When you shift your miner from one place to another, if you face any issues, you can set a network instead of the old one.

You can also consider resetting the miner to factory settings.

Also, try restarting the miner and see if the issue is fixed.

  1. Issue with the Control board – If you see any issue with the control board, you can ship it back to the manufacturer for a repair if the miner is still under the warranty period.

 

Missing IP address

 

Another issue that you may see is the missing IP address. You can use the following solutions to fix it.

  1. Issue with the mining software – You can go for a reset in case of any software issues. You can use the software reset at first. Then, if it is not working, go for a hardware reset.
  2. Problem with the router – Sometimes, the issue can be with the router, like the DHCP may not be activated. You can quickly fix the issue by activating the router’s DHCP mode.
  3. Ethernet cable issue – In certain cases, the issue can be due to faulty ethernet cables. So, you need to replace the old ethernet cable with a new one.
  4. Unable to find the IP address – you may find it difficult to find the IP address of the miner at times. There are various ways to find the IP address of the miner with the help of software programs. You can use any of those proven methods to find the exact IP.
  5. Issue with the control board – Faulty control board can be an issue at times. Here, you don’t have to waste time debugging the board. You can send it to the manufacturer of the miner for repair. The miner should be under warranty to get it repaired.

 

Not Able to Detect the Fan

 

One of the common issues that you can face is the non-detection of the fan by the miner. The possible causes for this fan issue and its rectification methods are listed below.

  1. Improper Connection of the fan – If you have connected the fan to the miner in the wrong orientation, it will not get detected in the system. It can also happen if the connection is a loose one. So, recheck the connection and reconnect the fan.
  2. Damage to the fan port in the control board – In some instances, the fan port in the control board may have been damaged. You will have to send the board back to replace the fan ports. It can be done if the miner is still under warranty.
  3. Damage to fan – If there is any kind of damage to the fan, the miner may not be able to detect the fan. You will have to contact the manufacturer to replace the fan.

 

Not Able to Detect the Hash Board

 

Sometimes, the hash boards of the miner may go undetected. The possible root cause of this issue, along with the fix, is given below.

  1. Issue with the connection of the cables – If the issue is related to the cables in the system, you need to switch off the miner. Try removing all the cables at first. You can reconnect it back again. See if the issue is getting fixed. If you are still seeing the same issue, replace the old cables with new ones.
  2. Damage in ports – If the ports of the hash boards are in a damaged state, send the boards back to the miner manufacturer for repair under warranty.
  3. Issue with the control board – If the issue is related to the control board, then you need to get the control board fixed. Please send it to the manufacturer to resolve the issue.

 

Not Able to Detect the Hash Speed

 

Hash speed is everything when it comes to crypto mining. The hash speed decides your revenue. If the miner is not able to detect the hash speed, then you must look into the issue immediately. Some of the common causes for this hash speed problem and its fix are listed below.

  1. Issue with the pool – Sometimes, the non-detection of the hash speed is an issue specific to your current mining pool. So, it is better to switch to a different pool and check whether the issue is getting resolved or not.
  2. Issue with the fan – If the fans are not running at the appropriate speed, the ASIC chips in the board will get heated. Thus, it can cause a non-detection of the hash speed. So, replace the old fans with new ones immediately.
  3. Damage to hash boards – If the hash board is in a damaged state, you must check with the manufacturer for a replacement or repair. You can do this if the miner is still in the warranty period.
  4. Issue with the control board – If the control board is in a damaged state, you must check with the manufacturer for a replacement or repair. You can do this if the miner is still in the warranty period.
  5. Problem with the network – If you face any network issues, then the hash speed may go undetected. So, check your network and fix it. You can also try establising a connection to a different network if you have one more.

 

Internet port Indicators are not working.

Sometimes, the LED indicator lights at the internet port can go faulty. The list of possible causes, along with their fix, is listed below.

  1. Issue with the Ethernet cable – If you have not plugged in the ethernet cable properly, this issue can occur. So, try reinserting the ethernet cable. It can also happen if the ethernet cable is faulty. In this case, you need to replace your ethernet cable with a new one.
  2. Issue with the control board – If the control board is in a damaged state, you must check with the manufacturer for a replacement or repair. You can do this if the miner is still in the warranty period.
  3. Issue with the switch – You need to have a look at the switch side to see the exact issue.

 

Low rotation speed of the fan

Troubleshooting antminer fan 1

If the rotational speed of the fans in the miner is very low, then it can be an issue. Generally, the difference in speed between the two fans in the miner must be below 3000. The possible cause and its fix are given below.

You will have to replace the current fan with a new one. If the issue still persists even after the fan replacement, you will have to send the miner back to the manufacturer for repair.

 

Fan issue displayed in the kernel log

You can go inside the kernel log page. Please search for error inside it. For example, if you are able to see Fat Error with a text message telling low fan speed or fan loss, it is an issue. The possible root cause and its fix are given below.

 

  1. Improper fan connection – The fan needs to be connected in a particular orientation. If you don’t follow that, you can get this message in the kernel log. If there is a loose connection in the fan, then also the same message may be displayed. You can try reconnecting the fan back to the system.
  2. Damage to fan ports in the control board. If the fan ports in the control board are damaged, then the kernel log will display this fatal error. So, you will have to fix the ports in the control board. You cannot do it by yourself. You need to send it to the manufacturer to get it repaired, provided it is still under warranty.
  3. Damaged Fans – If the fans are damaged, you need to replace them with new ones. You can get the fresh ones from the manufacturer during the warranty period.

 

Detection of the third fan

 

Sometimes there can be an issue with third fan detection. The possible cause for this problem and the fix are listed below.

  1. Consider replacing both the fans in the miner with new ones. Check and see if this solution resolves the issue.
  2. If the issue is still present, you need to send it to the manufacturer for a repair if the miner is under the warranty period.

 

Rotation of fan crossing 7000

Troubleshooting antminer fan 2

 

If the fan rotation is crossing 7000, it can be an issue. The possible reasons and the fix to the problem are given below.

  1. You need to replace the old two fans with new ones and see if that resolves the problem.
  2. If you still see the issue, you will have to send it for repair. If the miner is still under warranty, you can send it to the manufacturer for repair.

Appendix

Series articles on crypto miner maintenance:

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