opti-solar SC Series Installation And Operation Manual page 20

LIGHT TEST Button
Press the LIGHT TEST button to enter the testing mode to check if the Lighting Control
Switch has been correctly set in order to control the lights based on desired timer. The
procedure is listed as below.
STEPS:
1. Select Dip Switch 7 to be ON
2. Press LIGHT TEST push button until the CHARGE LED blinks in red and green in
turns.
3. Count 24 hours a day as 24 seconds so 1 hour equals to 1 second and 12 seconds for
day time and 12 seconds for night time.
4. If the Lighting Control Switch is placed at 2, the light load will light for 2 seconds for
testing.
5. If the Lighting Control Switch is placed at 3/1, the light load will light for 3 seconds
and then stop for 8 seconds and light again for 1 second.
6. After 24 seconds, another cycle of test will continue to activate.
7. Press LIGHT TEST button to return to charge battery/load control state.
Auto Detector for Day and Night
The SC Lighting Control Series uses the solar array to detect day and night. The transition to
night requires a solar insulation level less than 2 percent. The transition back to day requires
a high solar array open-circuit voltage. Both state changes require 10 minutes of continuous
transition values before making the change. These constraints avoid false transitions due to
lightning or dark storm clouds.
Measure Night Length
The LIGHTING CONTROL options that turn the lights on again before sunrise require
that the SC Lighting Control Series measure the length of the night. Therefore, the controller
cannot turn the lights on before sunrise the first night after installation (or after reconnecting
the battery). If the solar array is disconnected during service, the controller will then
measure a faulty night length. Either reset the controller by reconnecting the battery, or
this short "night" will be automatically corrected by the controller after 4 days of
service.
NOTE: The SC Lighting Control Series uses the open circuit voltage of the PV panel to
determine the correct time for dawn and dusk. If the PV panel is covered with debris
(e.g. snow, leaves, dirt), the PV panel voltage may be too low which can cause load
timing errors. If the load is operating erratically, make sure the PV panels are clean, there
are no obstructions shading the array, and the PV panels are oriented to the sun correctly.
The SC Lighting Control Series will automatically correct load timing errors within
4 days of clearing the array.
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