LT-12PREG-1
10
Charles Industries, Ltd. All rights reserved. Printed in the United States of America.
The STATUS LED
This green LED shows at which setpoint the regulator is presently operating. Status is shown by flashing the LED
ON and OFF—times in seconds as shown in Table 5.The same information is available at the STATE output.
Table 5. Status LED
Status
ON
OFF
Bulk Charge
2
1
Gas Charge
6
1
Absorption Charge
1
1
Step to Float
1
6
Float Charge
2
2
Gas Lock
3
1
ABS Hold
1
3
Equalization Charge
6
6
The ERROR LED
Abnormal conditions are reported by the red ERROR LED (and the external lamp/alarm, if wired). Errors are indi-
cated by flashing the LED ON and OFF—times in seconds as shown in Table 6.
Table 6. Error LED
Error
ON
OFF
Can’t turn field off
1
1
Can’t turn field on
1
3
Battery volts disconnected
3
1
Over temperature
3
3
Voltage runaway
6
3
Bad temperature sensor
6
6
Field short circuit
3
6
ALTERNATOR REQUIREMENTS
The alternator must be an externally-regulated model with one brush connected to ground and the other brush
fitted with a connection to make the field connection (P-type).
Note:
Alternators not rated for continuous operation at high current and temperature may fail when driven by
the regulator unless the current is limited to a safe value.
TROUBLESHOOTING
Most problems with new installations are due to wiring faults. Look at the signal list (Table 3) and make sure that
all required wires are in place and properly connected.
Remove the T+ connection to prevent a faulty temperature sensor from affecting the system.
If all required wires are proper, as verified by a multimeter on the regulator connections, call your dealer or local
installer with voltage readings on al the regular connections. Measure the ON/OFF signal with the ignition switch
off, and again with it on.