opti-solar SC Series Installation And Operation Manual page 22

troubleshooting the problem.
● Check that the load is turned on. Check that no system fuses are defective. Check
that no system circuit breakers are tripped. Remember that there are no fuses or
circuit breakers inside the SC Lighting Control Series.
● Check connections to the load, and other controller and battery connections. Make
sure voltage drops in the system wires are not too high.
● Check for proper LED indications on the SC Lighting Control Series. If the solid orange
LOAD DISCONNECT LED is on, the load has been disconnected due to low battery
voltage. This is generally a normal state when the load exceeds the PV array output
due to weather and other sunlight conditions.
● Check the PV array voltage under direct sun, with the array leads disconnected. The
voltage should be close to the expected open circuit voltage for the panel type used.
● Visually inspect the PV array and verify that the array is clear of debris (e.g. leaves,
snow, dirt) and that it is oriented correctly for the installation location
● Measure the voltage at the controller BATTERY terminals. If this voltage is above
the LVD, the load should have power. Press the MANUAL EQU/LVR button and
then measure the voltage at the controller LOAD terminals, and if there is no voltage
present, the controller may be defective.
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