Taylor-Dunn B0-248-48AC Operation, T Roubleshooting And Replacement Parts Manual page 138

Electrical Troubleshooting
Code Handset Display
Effect of Fault
24
Overvoltage Cutback
Reduced brake torque.
25
+5-volt Supply Failure
None.
26
Digital Out 6 Overcurrent
Digital output 6 will not turn on
27
Digital Out 7 Overcurrent
Digital output 7 will not turn on
28
Motor Temp Hot Cutback
Reduced drive torque.
29
Motor Temp Sensor Fault
MaxSpeed reduced, Limited Operating Strategy (LOS)
and motor temperature cutback disabled.
31
Main Open/Short
Shutdown Driver 1;
Shutdown of motor;
Shutdown of EM brake.
32
EM Brake Open/Short
Shutdown Driver 2;
Shutdown Throttle;
Full brake.
33
Coil3 Driver Open/Short
Shutdown driver 3.
35
PD Open/Short
Shutdown PD
36
Encoder Fault
Control mode changed to , Limited Operating Strategy
(LOS)
37
Motor Open
Shutdown main contactor;
Shutdown motor;
Shutdown EM bake.
38
Main Contactor Welded
Shutdown main contactor;
Shutdown motor;
Shutdown EM bake
39
Main Contactor Did Not Close
Shutdown main contactor;
Shutdown motor;
Shutdown EM bake
41
Throttle Wiper High
Shutdown throttle.
42
Throttle Wiper Low
Shutdown throttle.
43
Brake Wiper high
Full brake.
Troubleshooting Page 4
Possible Cause
1. Battery failure.
2. High voltage generated
during normal regen.
1. Faulty motor encoder.
2. Faulty wiring
1. Load on output #6 exceeded
0.015 Amps.
1. Load on output #7 exceeded
0.015 Amps.
1. Vehicle operated in extreme
high ambient temperatures.
2. Vehicle overloaded.
1. Motor temperature sensor
fault.
2. Wiring Fault.
1. Faulty main contactor coil.
2. Faulty wiring.
3. Faulty motor brake.
4. Faulty wiring.
1. See note.
1. See note.
1. Faulty motor encoder.
2. Faulty wiring.
1. Open motor windings.
2. Faulty wiring.
1. Main contactor welded.
2. Motor phase 'U' open
circuit.
3. Short to B+ controller
terminal.
4. Faulty wiring.
1. Faulty main contactor.
2. Faulty wiring.
3. B+ Circuit breaker blown.
1. Faulty throttle module.
2. Faulty wiring.
1. Faulty throttle module.
2. Faulty wiring.
1. See note, voltage too high
on pin-17.
Note
+5-volt supply at Pin -
26 is too low
Not used – If fault
occurs then check
controller connector
for contamination
Not used – If fault
occurs then check
controller connector
for contamination
Motor overheated
Not used – If fault
occurs then check
controller connector
for contamination
Not used – If fault
occurs then check
controller connector
for contamination
Voltage from throttle
module too high
Voltage from throttle
module too low
Not used – If fault
occurs then check
controller connector
for contamination