Specialty Concepts SC3/10) - Manual (Page 11)

SC3/10 PROBLEM DESCRIPTIONS
(from the SC3/10 PROBLEM CHART)
SC3/10 Case 1 - A continuous low voltage condition with good charging during the day
would indicate that the controller is functional but a problem exists with one of the
following:
•
A problem exists with the system sizing. See SYSTEM IS NOT SIZED CORRECTLY
(Help Note #5)
••
A problem exists with the solar panels. See SOLAR PANEL PROBLEM SECTION
••
A problem exists with the batteries. See BATTERY PROBLEM SECTION
SC3/10 Case 2 - A low voltage condition with no charging during the day would indicate
one of the following:
•
The system has no panel input. See BAD CONNECTION: PANEL (Help Note #8)
••
The SC3/10 may be defective. See CONTROLLER DEFECTIVE (Help Note #12)
SC3/10 Case 3 - A moderate voltage condition where the charging appears to stop too
soon (below 14.1 volts) would indicate one of the following:
••
The SC3/10 may have a bad battery connection. Somewhere in the battery
connection there could be a voltage drop that would cause the controller to sense
a higher battery voltage than what actually exists. See BAD CONNECTION:
BATTERY (Help Note #9)
••
The SC3/10 may be defective. See CONTROLLER DEFECTIVE (Help Note #12)
TEST: - Try to monitor the voltage at the SC3/10 battery connection wires (Red and Black)
when the controller actually stops charging (CHARGING light goes OFF). If the
voltage at the SC3/10 terminals is about 14.3 volts then assume a voltage drop along
the battery connection is causing the problem.
SC3/10 Case 4 - A high voltage condition with additional charging would indicate one of
the following:
•
The battery voltage may be just under the charge termination set-point and not need
to shut off. See NORMAL OPERATION: CHARGING / NOT CHARGING (Help
Note #1)
•
The SC3/10 may be defective. See CONTROLLER DEFECTIVE (Help Note #12)
SC3/10 Case 5 - A high voltage condition (over 14.5 volts) with the solar charging
terminated during the day would indicate the controller is functional but the batteries are
being over-charged by a second charging source. Other charging sources should
feature their own charge regulation.