11 — DIAGNOSTICS AND TROUBLESHOOTING
Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
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pg. 146
CODE
(status#,bit)
PROGRAMMER LCD DISPLAY
EFFECT OF FAULT
POSSIBLE CAUSE SET / CLEAR CONDITIONS
73
(Status5,7)
Stall Detected
ShutdownEMBrake;
Motor disabled;
Control Mode changed to LOS
(Limited Operating Strategy).
1. Stalled motor (motor current insufcient
to move the vehicle, for example up a
steep hill or over-loaded).
2. Motor encoder failure (no feedback
received at the controller).
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 (no
motor speed), yet controller is requesting current
(throttle command).
Clear: Either cycle KSI, or if parameter LOS Upon
Encoder Fault = On and Interlock has been
cycled, then the Stall Detected fault is cleared
and Encoder LOS fault (code 93) is set, allowing
limited motor control.
74
(Status7,6)
Fault On Other Traction
Controller
1. Dual Drive fault: see Dual Drive manual.
75
(Status7,5)
Dual Severe Fault 1. Dual Drive fault: see Dual Drive manual.
76
(Status8,6)
Insulation Resistance Low
Isolation monitor will open circuit
its connection between the high
power circuit and the vehicle
chassis. Driving is still allowed.
1. See Monitor menu » Battery:
Insulation Resistance.
2. Insulation Resistance Fault threshold set
too high.
3. Electrical fault path between high power
battery terminals and chassis.
4. Insulation breakdown in motor.
5. Short circuit to chassis fault in high
power system wiring.
6. Internal controller failure.
Set: Insulation Resistance dropped below
Insulation Resistance Fault threshold.
Clear: Remove insulation fault; cycle KSI.
77
(Status6,5)
Supervisor Fault
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
ShutdownInterlock;
ShutdownDriver1;
ShutdownDriver2;
ShutdownDriver3;
ShutdownDriver4;
ShutdownPD;
FullBrake.
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 (for recurring errors, check
the switches for moisture).
Set: Mismatched redundant readings; damaged
Supervisor; illegal switch inputs.
Clear: Check for noise or voltage drift in all
switch inputs; check connections; Cycle KSI or
VCL reset.
78
(Status9,0)
Supervisor Incompatible
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
ShutdownInterlock;
ShutdownDriver1;
ShutdownDriver2;
ShutdownDriver3;
ShutdownDriver4;
ShutdownPD;
FullBrake.
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.
82
(Status6,0)
Bad Calibrations
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake.
1. Internal controller fault. Set: Internal controller fault detection.
Clear: Cycle KSI or preform a VCL reset.
Table 6 TROUBLESHOOTING CHART cont’d
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