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<p><font size="+2"><font face="Times New Roman"> I'm
no EE, nor do I portray one on Television....................
<G> <font face="Times New Roman">S</font>ince the
armature limiter bypass contactor<font face="Times New Roman">s
are controlled b<font face="Times New Roman">y</font> SCRs,
ins<font face="Times New Roman">u</font>fficient voltage
present is a viable culprit.</font></font></font></p>
<p><font size="+2"><font face="Times New Roman"><font face="Times
New Roman"><br>
</font></font></font></p>
<p><font size="+2"><font face="Times New Roman"><font face="Times
New Roman"><font face="Times New Roman">RJ</font></font></font></font></p>
<p><font size="+2"><font face="Times New Roman"><font face="Times
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<div class="moz-cite-prefix">On 9/29/2016 9:40 AM, Briggs, Michael
wrote:<br>
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<p>Over the past year, I've had a persistent issue where my E-15
(early) would not always move out of the first speed when moving
the speed selector past it. It has seemed like the issue may be
in some way related to battery voltage, since it seemed like the
issue was more likely to happen if I turned the mower blades on
first (and the high current draw caused the pack voltage to
drop) and then moved the speed selector forward. If I moved the
speed selector forward first without having the blades on, it
seemed more likely to go to higher speeds without an issue. <br>
</p>
<p><br>
</p>
<p>Last weekend while mowing, it eventually got to the point that
it wouldn't move out of the first speed no matter what. <br>
</p>
<p><br>
</p>
<p>The observation that it seemed dependent on the pack voltage
made me wonder if there is some kind of "limp mode" operation,
such that a minimum pack voltage is needed to get the tractor to
move past first speed. But, this weekend it seemed like it
wasn't moving out of first speed no matter what. <br>
</p>
<p><br>
</p>
<p>Any thoughts?<br>
</p>
<p><br>
</p>
<p>Thanks,<br>
</p>
<p>Mike<br>
</p>
<p><br>
</p>
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<div>Michael S. Briggs, PhD</div>
<div>UNH Physics Department</div>
<div>(603) 862-2828</div>
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