Hi all... I am having a little trouble with an MRC 989.. The unit is pre-owned and I got it off
ebay. So far I have been able to discharge and charge three sets of 16 cell packs
with no worries. On the fourth set I noticed that the charger had cut out a little early in the discharge mode and the cells still had a little bit left in them. I restarted the dis-charge
and few moments after it shut down again with the voltage per cell way above the target I had set (.4 per cell - not sure if that is right now)...
Then I noticed that the temp of the charger went up a bit when I started the dis-charge... It had gone up to 155° with the the internal fan going in two and a half minutes.
Set up was:
MAH -3300 is set for that profile (it only removed 130 mah).
Cut off V - 0.40
AMPS - 5
Number of cells - 12
For some reason it does not like me setting up above 2 amps... Though even at two amps it looks like it's shutting down pre-maturely. When I gave up on the discharge mode,
I tried charging at 5 amps (since this thing is rated for 10), it do not go past 300 mah. The temp had gone again.
set up for charge:
12 cells
3300 mah
4.5 amps
Trickle - .35 amps
Cut off temp - 136° (for the batts)
Cut off peak m V - 5
Has anyone seen this kind of problem before with this charger? any advice/help with be appreciated.
Alien