Wheel System, Traction 198Service Manual – SC6500
™
Troubleshooting Chart
Flash
Code
#
Programmer LCD
Display/ Effect Of Fault
Possible Cause(s) Set/Clear Conditions
73 Stall Detected
ShutdownEMBrake;
Control Mode changed to
LOS (Limited Operating
Strategy).
1. Stalled motor.
2. Motor encoder failure.
3. Bad crimps or faulty wiring.
4. Problems with power supply
for the motor encoder.
5. See Monitor menu » Motor:
Motor RPM.
Set: No motor encoder
movement detected.
Clear: Either cycle KSI, or
detect valid motor encoder
signals while operating in
LOS mode and return Throttle
Command = 0 and Motor RPM
= 0.
74 Fault On Other Traction
Controller
1. Dual Drive fault: see Dual
Drive manual.
75 Dual Severe Fault
1. Dual Drive fault: see Dual
Drive manual.
77 Supervisor Fault
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
ShutdownInterlock;
ShutdownDriver1;
ShutdownDriver2;
ShutdownDriver3;
ShutdownDriver4;
ShutdownPD; FullBrake;
ShutdownPump
1. The Supervisor has detected
a mismatch in redundant
readings.
2. Internal damage to Supervisor
microprocessor.
3. Switch inputs allowed to
be within upper and lower
thresholds for over 100
milliseconds.
Set: Mismatched redundant
readings; damaged Supervisor;
illegal switch inputs.
Clear: Check for noise or
voltage drift in all switch
inputs; check connections; cycle
KSI.
78 Supervisor Incompatible
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
ShutdownInterlock;
ShutdownDriver1;
ShutdownDriver2;
ShutdownDriver3;
ShutdownDriver4;
ShutdownPD; FullBrake;
ShutdownPump
1. The main OS is not compatible
with the Supervisor OS.
Set: Incompatible software.
Clear: Load properly matched
OS code or update the
Supervisor code; cycle KSI.
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