4
the case, you can increase the output voltage of the unit that is reading low using the output adjust
potentiometer.
OPERATION
Turn the switch on the top of the unit on to energize the outputs. The green ‘Output On’ indicator
light will glow to indicate the proper operation of the unit.
OUTPUT ADJUSTMENT
The unit has an adjustment potentiometer to allow up to
±
0.5V adjustment of the output voltage.
This potentiometer is accessed through a small hole in the top of the power supply. As shipped from
the factory, the unit is preset for a voltage of 13.6, 27.2 or 54.4VDC. If you wish to adjust this
voltage, remove the cover plate (secured by 2 screws) to expose the Output Adjust potentiometer.
Reach in with a very small flat blade screwdriver to rotate the potentiometer. Clockwise increases the
output voltage and counter clockwise decreases it. When you are done, replace the cover plate and
securely tighten the screws.
METERS
1 or 2 high quality 2 ½ inch analog meters can be added to the charger (factory installed only). 1
ammeter allows monitoring of total output current. 2 ammeters allow independant monitoring of the
current into each of the output terminals. 1 ammeter and 1 voltmeter allow monitoring of total output
current and output voltage.
TROUBLE SHOOTING
This unit provides LED indicators and a buzzer to help diagnose any problems. The unit should
sound the buzzer to alert you prior to shutting itself down. You should immediately check the
indicators to determine the cause of the shutdown.
•
LOW OUTPUT
Indicates that the output voltage is below normal because:
•
The current demanded by the devices connected to the unit exceeds the
maximum output current rating, thereby causing the output voltage to drop
to maintain the current at the maximum level,
•
The input voltage is not high enough for unit to operate,
•
LOW INPUT
Indicates that the input voltage is below normal because:
•
The input voltage is not in the correct range for proper operation of the unit.
•
OVERHEAT
Indicates that the power supply is running too hot because:
•
Too much power is being drawn, turn off or unplug some devices.
•
The power supply is located in a poorly ventilated area.
If the load exceeds the continuous rating for too long a period, the temperature sensor inside the unit
will turn off the outputs. After the unit cools sufficiently, it will automatically come back on. If this
happens frequently, remount the unit for increased airflow so it cools better.
