A miner grounding issue could occasionally be the cause of your Bitamain Antminer L3 series’ malfunction. Your Bitmain Antminer L3+ or Antminer L3++‘s proper grounding can be verified using the instructions in this guide.
When you see all chips in the miner status had become “xxxxxx”, it might not necessarily be a hash board defect but a miner grounding issue.
Below picture is an example:
When the L3 miners are improperly grounded, electricity can leak from the wiring system onto the miner’s outer body or casing (because it is a metallic surface), eventually harming the control boards and hash boards.
For the miner to last longer and perform better, keep the voltage below 0.3 V. On the other hand, voltage above 1 V will harm the miner.
- Hire a qualified electrician to plan or carry out grounding.
Check the following to test if your miner is grounded:
1. The miner must not be in contact with any metal shelves in order to use this method.
Adjust the multimeter to 220 V AC. Place the test lead for the multimeter on the exposed metal shelf and the miner’s aluminum body/casing when it is operating.
- Voltage indicates improper or incomplete grounding, and prompt remedial action is necessary.
- The absence of any voltage indicates that the grounding is sound and there are no leaks.
2. For this method to work, the control board panel of the miner’s Ethernet port must be separated from the metal frame of the miner.
Set the multimeter to 220 V AC. Place the test leads of the multimeter on the Ethernet port’s metal frame and the miner’s aluminum body/casing while it is operating (see the photo below for an example).
- Voltage indicates improper or incomplete grounding, and prompt remedial action is necessary.
- The absence of any voltage indicates that the grounding is sound and there are no leaks.
Please don’t hesitate to get in touch with us if you have any questions.
