Wheel System, Traction 192Service Manual – SC6500
™
Troubleshooting Chart
Flash
Code
#
Programmer LCD
Display/ Effect Of Fault
Possible Cause(s) Set/Clear Conditions
23 Undervoltage Cutback
Reduced drive torque.
1. Normal operation. Fault
shows that the batteries
need recharging. Controller
is performance limited at this
voltage.
2. Battery parameters are
misadjusted.
3. Non-controller system drain on
battery.
4. Battery resistance too high.
5. Battery disconnected while
driving.
6. See Monitor menu » Battery:
Capacitor Voltage.
7. Blown B+ fuse or main
contactor did not close.
Set: Capacitor bank
voltage dropped below the
Undervoltage limit with the
FET bridge enabled.
Clear: Bring capacitor voltage
above the Undervoltage limit.
24 Overvoltage Cutback
Reduced brake torque.
Note: This fault is declared
only when the controller is
running in regen.
1. Normal operation. Fault
shows that regen braking
currents elevated the battery
voltage during regen braking.
Controller is performance
limited at this voltage.
2. Battery parameters are
misadjusted.
3. Battery resistance too high for
given regen current.
4. Battery disconnected while
regen braking.
5. See Monitor menu » Battery:
Capacitor Voltage.
Set: Capacitor bank voltage
exceeded the Overvoltage limit
with the FET bridge enabled.
Clear: Bring capacitor voltage
below the Overvoltage limit.
25 +5V Supply Failure
None, unless a fault action
is programmed in Vehicle
Control Language.
1. External load impedance on
the +5V supply (pin 26) is too
low.
2. See Monitor menu » outputs: 5
Volts and Ext Supply Current.
Set: +5V supply (pin 26)
outside the +5V±10% range.
Clear: Bring voltage within
range.
26 Digital Out 6 Overcurrent
Digital Output 6 driver will
not turn on.
1. External load impedance on
Digital Output 6 driver (pin 19)
is too low.
Set: Digital Output 6 (pin 19)
current exceeded 15 mA.
Clear: Remedy the overcurrent
cause and use the VCL
function Set_DigOut() to turn
the driver on again.
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