To Next PageTo Next PageHow to troubleshoot a Precharge Failed error on a Curtis 1238SE?
Precharge failure in a Curtis Controller means the precharge has failed to charge the capacitor bank to the KSI voltage. This can be caused by an external load on the capacitor bank (B+ connection terminal) preventing charging. To clear it, cycle the Interlock input or use the VCL function Enable_Precharge().
What to do if my Curtis Controller shows a severe overtemp?
If the Curtis Controller's heatsink temperature rises above +95°C, it triggers a severe overtemp condition. This could be due to the controller operating in an extreme environment, excessive vehicle load, or improper mounting. To resolve this, reduce the heatsink temperature below +95°C and cycle the interlock or KSI.
How to fix a Curtis Controller overcurrent issue?
Controller overcurrent can occur if the phase current exceeds the current measurement limit. This can be caused by an external short in the phase U, V, or W motor connections, mis-tuned motor parameters, a defective controller, or speed encoder noise problems. To clear this, cycle the KSI.
Why does my Curtis 1238SE Controller show a severe B+ undervoltage?
Severe B+ undervoltage in a Curtis Controller happens when the capacitor bank voltage drops below the Severe Undervoltage limit with the FET bridge enabled. This can be caused by misadjusted battery parameters, non-controller system drain on the battery, high battery resistance, the battery disconnecting during driving, or a blown B+ fuse. To resolve, bring the capacitor voltage above the Severe Undervoltage limit.
What causes a Curtis 1238SE Controller severe undertemp error?
If the Curtis Controller's heatsink temperature falls below -40°C, it triggers a severe undertemp condition, often due to operating in an extreme environment. To resolve this, bring the heatsink temperature above -40°C and cycle the interlock or KSI.
Why is my Curtis 1238SE showing a severe KSI undervoltage?
Severe KSI undervoltage in a Curtis Controller occurs when the KSI voltage drops below the Brownout Voltage for 2 seconds. This can be due to a non-controller system drain on the battery/KSI circuit wiring, KSI disconnecting while driving, or a blown KSI fuse. To fix this, bring the KSI voltage above the Brownout Voltage.
What does Current Sensor Fault mean on my Curtis 1238SE?
A Current Sensor Fault in the Curtis Controller indicates that the controller current sensors have an invalid offset reading. This can be caused by leakage to the vehicle frame from phase U, V, or W (short in motor stator) or a defective controller. To clear this, cycle the KSI.
General| Brand | Curtis |
|---|---|
| Model | 1238SE |
| Category | Controller |
| Language | English |
Describes how to connect high current terminals (B+, B-, U, V, W) and proper lug assembly.
Details the 35-pin AMPSEAL connector and wiring guidelines for low power signals.
Covers parameters for tuning motor response in Speed Mode.
Covers parameters for tuning motor response in Torque Mode.
Sets maximum RMS current limits for drive, regen, and brake operations.
Configures throttle input types, deadbands, maps, and offsets.
Configures brake input types, deadbands, maps, and offsets.
Configures EM brake response to interlock, throttle, and motor speed.
Configures parameters for ACIM or SPM motor auto-characterization tests.
Sets nominal battery voltage and over/undervoltage protection thresholds.
Sets drive, regen, brake, EMR, and interlock current limits as percentages of rated current.
Sets the nominal battery pack voltage for system voltage protection.
Guides setting up throttle type, deadbands, and max values, verifying interlock.
Guides setting up brake type, deadbands, and max values, verifying interlock.
Selects motor technology (ACIM/SPM) and matching feedback type.
Steps for ACIM characterization including motor poles, speed, and current settings.
Specific steps for running SlipGain and FW Base Speed tests for traction systems.
Guides tuning parameters for Speed Mode Express.
Guides tuning parameters for Speed Mode.
Guides tuning parameters for Torque Mode.
Guides users through troubleshooting controller faults using a chart.
