11 — DIAGNOSTICS AND TROUBLESHOOTING
Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
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pg. 144
CODE
(status#,bit)
PROGRAMMER LCD DISPLAY
EFFECT OF FAULT
POSSIBLE CAUSE SET / CLEAR CONDITIONS
37
(Status4,7)
Motor Open
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake.
1. Motor phase is open.
2. Bad crimps or faulty wiring.
Set: Motor phase U, V, or W detected open.
Clear: Cycle KSI.
38
(Status1,0)
Main Contactor Welded
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake.
1. Main contactor tips are welded closed.
2. Motor phase U or V is disconnected
or open.
3. An alternate voltage path (such as an
external precharge resistor) is providing
a current to the capacitor bank (B+
connection terminal).
Set: Just prior to the main contactor closing, the
capacitor bank voltage (B+ connection terminal)
was loaded for a short time and the voltage did
not discharge.
Clear: Cycle KSI.
39
(Status1,1)
Main Contactor Did Not Close
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake.
1. Main contactor did not close.
2. Main contactor tips are oxidized, burned,
or not making good contact.*
3. External load on capacitor bank (B+
connection terminal) that prevents
capacitor bank from charging.
4. Blown B+ fuse.
Set: With the main contactor commanded
closed, the capacitor bank voltage (B+
connection terminal) did not charge to B+.
Clear: Cycle KSI.
*New contactors may need to be cycled electrically &
mechanically to remove any non-conductive material
on the tips. Use reduced voltage (e.g., 12V) to prevent
tip damage through excessive arcing.
41
(Status1,4)
Throttle Wiper High
ShutdownThrottle.
1. See Monitor menu » Inputs: Throttle Pot.
2. Throttle pot wiper voltage too high.
Set: Throttle pot wiper (pin 16) voltage is higher
than the high fault threshold (can be changed
with the VCL function Setup_Pot_Faults()).
Clear: Bring throttle pot wiper voltage below the
fault threshold.
42
(Status1,3)
Throttle Wiper Low
ShutdownThrottle.
1. See Monitor menu » Inputs: Throttle Pot.
2. Throttle pot wiper voltage too low.
Set: Throttle pot wiper (pin 16) voltage is lower
than the low fault threshold (can be changed
with the VCL function Setup_Pot_Faults()).
Clear: Bring throttle pot wiper voltage above the
fault threshold.
43
(Status1,6)
Pot2 Wiper High
No Action
1. See Monitor menu » Inputs: Pot2 Raw.
2. Pot2 wiper voltage too high.
Set: Pot2 wiper (pin 17) voltage is higher than
the high fault threshold (can be changed with
the VCL function Setup_Pot_Faults()).
Clear: Bring Pot2 wiper voltage below the fault
threshold.
44
(Status1,5)
Pot2 Wiper Low
No Action
1. See Monitor menu » Inputs: Pot2 Raw.
2. Pot2 wiper voltage too low.
Set: Pot2 wiper (pin 17) voltage is lower than
the low fault threshold (can be changed with the
VCL function Setup_Pot_Faults()).
Clear: Bring Pot2 wiper voltage above the fault
threshold.
45
(Status1,2)
Pot Low OverCurrent
No Action.
(Does not shut down the pot’s
low-current source.)
1. See Monitor menu » Outputs: Pot Low.
2. Combined pot resistance connected to
pot low is too low.
Set: Pot low (pin 18) current exceeds 10 mA.
Clear: Clear pot low overcurrent condition and
cycle KSI.
46
(Status1,7)
EEPROM Failure
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
ShutdownInterlock;
ShutdownDriver1;
ShutdownDriver2;
ShutdownDriver3;
ShutdownDriver4;
ShutdownPD;
FullBrake.
1. Failure to write to EEPROM memory.
This can be caused by EEPROM memory
writes initiated by VCL, by the CAN
bus, by adjusting parameters with the
programmer, or by loading new software
into the controller.
Set: Controller operating system tried to write to
EEPROM memory and failed.
Clear: Download the correct software (OS) and
matching parameter default settings into the
controller and cycle KSI.
Table 6 TROUBLESHOOTING CHART cont’d
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