This guide teaches you how to check if your Bitmain Antminer S9 Series Miner is grounded properly to avoid the control boards and hash boards damage.
When you see all chips in the Bitmain Antminer S9 Series miner status had become “xxxxxx”, it might not necessarily be a hash board defect but a miner grounding issue.
Below picture is an example:
Due to the metallic surface of the miner outer body/casing and the improper grounding of the miners, long-term damage to the control boards and hash boards can result from electricity leaking from the wiring system onto the surface.
For the miner to last longer and perform better, keep the voltage below 0.3 V. However, a miner will be harmed by voltage levels above 1 V.
- Plan or complete grounding with the help of a qualified electrician.
Check the following to test if your Bitmain Antminer S9 Series miner is grounded:
1. The miner must be free of any metal shelves in order to use this technique.
Set the multimeter to 220 V AC. Place the test lead of 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 needed.
- The absence of any voltage indicates that the grounding is sound and there are no leaks.
2. For this technique to work, the miner’s metal control board panel and Ethernet port metal frame must be separate from one another.
The multimeter should be set to 220 V AC. Place the multimeter’s test leads on the Ethernet port’s metal frame and the miner’s aluminum body/casing while it is operating (see the photo below).
- 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.
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