Specialty Concepts SCS/90 - Manual (Page 17)

BATTERY OVERCHARGING
CONTROLLER ALWAYS IN FULL CHARGE ("CHARGING" LIGHT ON)
See number 6 above: The battery may not be reaching the charge termination set-
point.
See number 3 above: No voltage at the battery sense terminals tells the controller that
the battery voltage is low and needs to be charged more. Install a connection from
battery to "BATTERY SENSE" terminals to resolve.
See number 8 above: A damaged temperature sensor or wire will cause the controller
to malfunction and requires immediate replacement.
CONTROLLER NOT IN CHARGE MODE ("CHARGING" LIGHT OFF)
Disconnect array, then reconnect. Listen for relay to click and for “CHARGING" light to
come back on. If the light goes on but you hear no click, the relay or controller may
be defective.
Check for other charging sources that are not properly regulated, causing the battery to
overcharge.
LOAD DISCONNECT CIRCUIT (LVD) NOT OPERATING CORRECTLY
LOADS ALWAYS DISCONNECTED, LVD LIGHT ON, EVEN WHEN BATTERY
VOLTAGE IS HIGH
See number 6 above: No voltage at the battery sense terminals tells the controller that
the battery voltage is low and loads need to be disconnected. Install a connection
from the battery to "VOLTAGE SENSE" terminals to resolve.
LOADS DISCONNECTED TOO SOON OR NOT RECONNECTING
See number 4 above: The battery may not be reaching the reconnect voltage set-point.
See numbers 11 and 13 above: A poor connection between the controller and the
battery results in a voltage drop when heavy loads are turned on that disappears
when the loads are turned off. The heavier the loads are, the larger the voltage drop
will be. This voltage drop results in the controller seeing a lower voltage than what
the battery voltage actually is.
LOADS NOT DISCONNECTING ON LOW VOLTAGE, LVD LIGHT OFF
Check the position of the "LVD" switch. If the switch is in the "NO LVD" position the
load will not be disconnected.
LOADS ALWAYS DISCONNECTED, LVD LIGHT OFF, BATTERY VOLTAGE IS
HIGH
Check the load circuit breaker on the front of the controller. If the breaker is tripped, the
load will not operate.