Adjust potentiometer, high float switch, or timer If no change in output proceed to 2.
Jumper contacts of the power failure relay at the relay with jumper, or remove wires from relay and jumper
The transistor control has a terminal block mounted on the heat- sink with three terminals Remove the two
wires on terminal #1 from the control. Connect the two wires from #1 together. This isolates the control from
the reactor. The reactors then must saturate and shift a high voltage to the transformers to increase the
output. If the output increases to a high rate charge, without the control, this indicates the charger is working
properly and the control is defective The control should be replaced. If it is more convenient, check parts for
shorted transistor, shorted zener, or open RVI resistor.
If the charger does not go into a high rate charge
Check RC resistor for heat. This resistor is the largest resistor in the unit and runs quite hot
Check voltage across reactor center coil and RC resistor Both voltages should total battery voltage. If
RC resistor is cold or proper voltages are not indicated, look for broken wires, defective RC resistor, or
reactor center coil.
IV. IF THE CHARGER IS CHARGING AT A HIGH CHARGE RATE, AND WILL NOT SHUT DOWN TO THE
REQUIRED FLOAT OF EQUALIZNG VOLTAGE:
A. Adjust potentiometer, high float switch, or timer. If no change in output proceed to B.
B. With the high float switch in the float position, jumper red slider on RV1 resistor to the positive output terminal
(On older units using PNP transistor, jumper to negative ) If the charger shuts down, check.
Red slider connected to slider wires on resistor.
Potentiometer for open.
RVI resistor or positive lead for open
C. Check zener resistor mounted on the control panel, connected in series with terminal #2. Check by jumpering
D. Check zener diode for open diode. Also zener must be insulated from heatsink
E. Check for open transistor.
Check for broken wires or cold solder connections from the slider through terminal #2 to transistor. Also check
V. WHEN INSTAILNG A NEW CONTROL. THE RED AND GREEN SLIDERS ON RVI OR RV3 MUST BE RESET TO
THE PROPER OPERATING POSITION.