Wheel System, Traction
193
Service Manual – SC6500
™
Troubleshooting Chart
Flash
Code
#
Programmer LCD
Display
/ Effect Of Fault
Possible Cause(s)
Set
/
Clear
Conditions
27
Digital Out 7 Overcurrent
Digital Output 7 driver will
not turn on.
1. External load impedance on
Digital Output 7 driver (pin 20)
is too low.
Set
: Digital Output 7 (pin 20)
current exceeded 15 mA.
Clear
: Remedy the overcurrent
cause and use the VCL
function
Set
_DigOut() to turn
the driver on again.
28
Motor Temp Hot Cutback
Reduced drive torque.
1. Motor temperature is at or
above the programmed
Temperature Hot setting, and
the requested current is being
cut back.
2. Motor Temperature Control
Menu parameters are mis-
tuned.
3. See Monitor menu » Motor:
Temperature and » Inputs:
Analog2.
4. If the application doesn’t
use a motor thermistor,
Temp Compensation and
Temp Cutback should be
programmed Off.
Set
: Motor temperature is at
or above the Temperature Hot
parameter
set
ting.
Clear
: Bring the motor
temperature within range.
29
Motor Temp Sensor Fault
MaxSpeed reduced (LOS,
Limited Operating Strategy),
and motor temperature
cutback disabled.
1. Motor thermistor is not
connected properly.
2. If the application doesn’t use a
motor thermistor, Motor Temp
Sensor Enable should be
programmed Off.
3. See Monitor menu » Motor:
Temperature and » Inputs:
Analog2.
Set
: Motor thermistor input
(pin 8) is at the voltage rail (0
or 10V).
Clear
: Bring the motor
thermistor input voltage within
range.
31
Main Open/Short
ShutdownDriver1.
1. Open or short on driver load.
2. Dirty connector pins.
3. Bad crimps or faulty wiring.
Set
: Driver 1(pin 6) is either
open or shorted. This fault can
be set only when Main Enable
= Off.
Clear
: Correct open or short,
and cycle driver.
31
Main Open/Short
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake; ShutdownPump.
1. Open or short on driver load.
2. Dirty connector pins.
3. Bad crimps or faulty wiring.
Set
: Main contactor driver (pin
6) is either open or shorted.
This fault can be
set
only when
Main Enable = On.
Clear
: Correct open or short,
and cycle driver
