Status Led Code Table - Taylor-Dunn B0-248-48AC Operation, T Roubleshooting And Replacement Parts Manual

Status LED Code Table

The status LED's on the speed controller can be
used to give you an idea of where the problem may
be. During normal operation (no faults) the yellow
LED will be flashing steady.
When the controller senses a fault the two LED's
can be used to determine the fault code. The fault
code will be a two digit code. The red LED signifies
which digit and the yellow LED signifies the fault
code. For example: When the red LED flashes once,
the yellow LED will be flashing the first digit. When
the red LED flashes twice, the yellow LED will be
flashing the second digit. The fault code will repeat
until the fault is corrected.
Code Handset Display
Effect of Fault
12
Controller Overcurent
Shutdown of main contactor;
Shutdown of motor;
Shutdown of EM brake.
13
Current Sensor Fault
Shutdown of main contactor;
Shutdown of motor;
Shutdown of EM brake.
14
Precharge Failed
Shutdown of main contactor;
Shutdown of motor;
Shutdown of EM brake.
15
Controller Severe Undertemp
Shutdown of main contactor;
Shutdown of motor;
Shutdown of EM brake;
Shutdown throttle;
Full Brake.
16
Controller Severe Overtemp
Shutdown of main contactor;
Shutdown of motor;
Shutdown of EM brake;
Shutdown throttle;
Full Brake.
17
Severe Undervoltage
Reduced drive torque.
18
Severe Overvoltage
Shutdown of main contactor;
Shutdown of motor;
Shutdown of EM brake;
Shutdown throttle;
Full Brake.
21
Controller Undertemp Cutback
Reduced motor torque.
22
Controller Overtemp Cutback
Reduced drive and brake torque.
23
Undervoltage Cutback
Reduced drive torque.
Electrical Troubleshooting
Possible Cause
1. External short in motor wiring.
2. Defective controller.
3. Faulty wiring.
1. Short or leakage to frame from motor
windings or wiring.
2. Controller defective
1. External load attached to controller
B+ terminal.
1. Vehicle operated in temperatures
below -40ºC.
1. Vehicle operated in extreme high
ambient temperatures.
2. Vehicle overloaded.
3. Controller not properly mounted.
1. Blown circuit breaker.
2. Battery failure while in operation.
1. Blown circuit breaker during regen.
2. Battery failure during regen.
1. Controller operated in temperatures
below -25ºC
1. Vehicle operated in extreme high
ambient temperatures.
2. Vehicle overloaded.
3. Controller not properly mounted.
1. Batteries discharged.
2. Battery failure.
Troubleshooting Page 3
Typical location of Status LED's
Note
Possible non-factory
installed device
Controller overheated
(+95ºC)
Controller output is
reduced below -25ºC
Controller overheated
(+85ºC)