Owner`s manual

Auto Restart Set Point Adjustment
Manzanita Micro PFC chargers both new and old have an auto restart function built
in which can be activated and adjusted by the user. Because of the possibility of
thermal runaway from a battery pack, module or cell that is over-charged, Manzanita
Micro does not ship PFC chargers with the Auto Restart Switch enabled. If the end
user wishes to use this feature, they take full responsibility for any consequences
resulting from a charger which keeps re-starting.
Normally, a Manzanita Micro PFC charger will put out constant current until the
battery pack which it is connected to reaches the peak voltage set point which is
determined by the main “Volts Trim” pot or newer optional “digipot”. When the peak
voltage limit is reached, the yellow limits light will illuminate and the charger time-out
timer will activate and the blue timer LED will blink. If all of the dip switches on the
front of the charger are set as per the factory default settings, the charger will cut
back it's current so as not to exceed the peak voltage set point but it will keep
moving power until the blue timer LED locks on solid indicating that the time is up. At
this point the charger will stop moving current and will normally only ever re-start if
the input power to the charger is cycled off and back on. Because of this feature it is
conceivable that someone could leave their vehicle unattended but plugged in for a
very lengthy period of time and the attached battery pack could get to a dangerously
low level or even go to zero volts. The auto restart feature allows the charger to
automatically resume charging even after a full time-out if the connected battery
pack reaches a certain voltage set point. To enable the auto restart feature dip
switch # 8 must be in the ON position (which is down when looking at the front of the
charger head on). Please refer to the “Dip Switches” section earlier in this manual to
make sure you understand which dip switches are which and how they work.
The auto restart voltage set point is controlled by a special potentiometer just to the
right of the main REGBUS port when looking at the front of the charger. In order to
access this special potentiometer, the blue faceplate must be removed by loosening
the set screw on the “Amps” knob and removing the black plastic knob and the jam
nut on the front of the potentiometer shaft. Then the four Phillips head screws can
be removed and the blue faceplate can be pulled straight away from the charger to
allow access to the auto restart potentiometer (VR6). This potentiometer is clearly
pointed out in figure 14 in the “8A Control Board” section of this manual. The VR6
potentiometer is actually present in the same location even on older control boards.
IMPORTANT! The auto restart set point is based off of a percentage of the main
volts trim set point and therefore MUST ONLY BE ADJUSTED AFTER FIRST
PROPERLY ADJUSTING THE VOLTS TRIM POTENTIOMETER OR DIGIPOT as
explained in the “Volts Trim” section earlier in this manual.