Specialty Concepts SCS/90 - Manual (Page 15)

T R O U B L E S H O O T I N G : G E N E R A L N O T E S
IF THE CONTROLLER IS NEWLY INSTALLED, CHECK THESE FIRST:
1) Re-check system wiring to insure proper installation and polarity .
2) Check all system fuses and circuit breakers. A 1 amp AGC fuse is located behind the
front plate on the display circuit board. Before replacing a blown fuse, locate and
correct the cause.
3) Check to be sure that there is a connection (voltage input) to the " VOLTAGE
SENSE" terminals from the battery. This would be either a factory installed jumper
strip on the controller terminal block from the "VOLTAGE SENSE" terminals to the
"BATTERY" terminals, or a connection from the sense terminals directly to the
battery itself.
4) Check to see that modules and batteries are in the correct series-parallel
configuration for proper system voltage and current.
5) Review controller specifications relating to array output, load ratings and system
sizing to insure that ratings are not exceeded.
6) Review the controller specifications relating to operation and set-points, particularly
the charge termination and reconnect voltage set-points. If possible, check this with
the operation of the controller, monitoring the battery voltage.
7) Some types of loads (fluorescent lights, inverters) can generate electronic "noise"
that sometimes interferes with the operation of the controller. Check to see if
strange behavior can be traced to operation of a certain appliance.
8) Inspect the temperature sensor and sensor wire. Check for a broker sensor or a cut
or frayed sensor wire. See TEMPERATURE COMPENSATION section.
9) If possible, perform the "FIELD TEST PROCEDURE" and /or "BENCH TEST
PROCEDURE" that follows.
IF THE CONTROLLER HAS BEEN INSTALLED AND WORKING
PROPERLY FOR AWHILE, CHECK THESE FIRST:
10) Check all system fuses and circuit breakers. A 1 amp AGC fuse is located behind
the front plate on the display circuit board. Before replacing a blown fuse, locate
and correct the cause.
11) Confirm that all connections are clean and tight. Particularly check crimp
connections that have been crimped but not soldered as these connections tend to
deteriorate over time.
12) Some types of loads (fluorescent lights, inverters) can generate electronic "noise"
that sometimes interferes with the operation of the controller. Check to see if
strange behavior can be traced to operation of a certain appliance.
13) If you have an accurate digital volt meter, check for voltage drop between the
controller and the battery by measuring voltage at the battery and at the controller
when maximum charging is occurring. Drops often occur through old fuses, fuse
holders or circuit breaker boxes and at loose or corroded connections.
14) High voltage from nearby lightning strikes or unregulated charging sources can
damage the controller. The built-in lightning protection provides substantial
protection, but it is sometimes overwhelmed.
15) Inspect the temperature sensor and sensor wire. Check for a broker sensor or a cut
or frayed sensor wire. See TEMPERATURE COMPENSATION section.
16) Check output from the array, and that it is not partially shaded or dirty.
17) If possible, perform the "FIELD TEST PROCEDURE" and /or "BENCH TEST
PROCEDURE" that follows.