Taylor-Dunn B 2-48, Operation, T Roubleshooting And Replacement Parts Manual

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