StandardProducts/Lithiumate/Service/Troubleshooting/Banks/Missing/Bank/Part
   

<h1>Bank is missing;  cell boards blink up to a certain point</h1>


If all cell boards from the positive end board up to a certain point blink, then the rest don't blink, the problem is in the area where the blinking stops: 

<ul>
<li>The last board that blinks doesn't transmit to the next board, or 


<li>The link between that board and the next one is bad, or 


<li>The fist board that doesn't blink doesn't receive from the previous board  


</ul>
Test those 2 cell boards: the more positive one (the last one to blink), and the more negative one (the first one that doesn't blink). 

See also:  

<ul>
<li><a href="/Testing/Cell_Board">Cell Board testing</a>


</ul>

<h2>Set-up</h2>


First you must make sure that, once you fix the problem, the BMS controller is ready to see the bank 

<ul>
<li>On the terminal, do Home / Set-up / More... / Battery arrangement / Number of cells in each bank / Set manually 


<li>
Use the '&gt;' or '&lt;' keys to go to that bank 


<li>Enter the number of cells in series in that bank and press Enter 


</ul>

<h2>Procedures</h2>


<ul>
<li>Check the cell voltage of the first cell board that doesn't blink 

<ul>
<li>If below 2 V, charge the cell (if well below 2 V, replace the cell) 


</ul>

<li>Check that the wire between those 2 boards is wired properly 

<ul>
<li>On the more positive board, it must be connected to the 'C-' pad 


<li>On the more negative board, it must be connected to the 'C_' pad  


</ul>

<li>Check that the wire between those 2 boards is OK 

<ul>
<li>Visually 


<li>By tugging on it 


<li>With an ohmeter 


<li>If the wire is actually 2 wires joined together, check where their connection  


</ul>

<li>Check each end of the wire to make sure it's not shorted to the ground plane 

<ul>
<li>Visually 


<li>With an ohmeter, between the wire and the negative terminal (on a prismatic cell board, that's the ring terminal that is mounted directly on the board)  


</ul>

<li>Disconnect, then reconnect the first cell board that doesn't blink 

<ul>
<li>If the cell board doesn't blink, the cell board is bad 

<ul>
<li>Replace the cell board 


</ul>

<li>If the cell board blinks 2 blinks (repeated 3 times): 

<ul>
<li>If that fixes the problem, please report this fact to Elithion 


<li>Else: 

<ul>
<li>Measure the voltage of the wire, with respect to the power conductor (copper bar) that connects the 2 cells in question 

<ul>
<li>If it's 0 V, there may be a short on the more positive board between the 'C-' and 'B-' pads, on the more negative board between the 'C+' and 'B+' pads, but it's likely that the more positive board is bad 


<li>If it's positive (~ +3 V), there may be a short on the more positive board between the 'C-' and 'B+' pads, but it's likely that that board is bad 


<li>If it's negative (~ -3 V), that may be OK  


</ul>
</ul>
</ul>
</ul>
</ul>