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Edward MortonAug 16, 2025
Why does my Curtis Controller show an UNDERVOLTAGE CUTOFF?
- TTyler StanleyAug 16, 2025
The Curtis Controller shows an UNDERVOLTAGE CUTOFF because the battery voltage is lower than the LOVOLT CUTOFF setting.
To Next PageTo Next PageWhy does my Curtis Controller show an UNDERVOLTAGE CUTOFF?
The Curtis Controller shows an UNDERVOLTAGE CUTOFF because the battery voltage is lower than the LOVOLT CUTOFF setting.
Why is my Curtis 1253 showing a LOW BATTERY VOLTAGE?
Your Curtis Controller may be indicating LOW BATTERY VOLTAGE because the battery voltage is below the undervoltage cutback threshold, the battery terminal is corroded or the battery or controller terminal is loose.
What causes an OVERVOLTAGE error on a Curtis Controller?
An OVERVOLTAGE error on a Curtis Controller can be triggered if the battery voltage exceeds the overvoltage shutdown threshold, or if the vehicle is being operated with the charger still attached.
What does it mean when my Curtis Controller displays 'MOTOR SHORTED'?
The 'MOTOR SHORTED' message on your Curtis Controller indicates that the motor is shorted.
What triggers a THERMAL CUTBACK on a Curtis Controller?
A THERMAL CUTBACK on a Curtis Controller can be triggered if the temperature is greater than 85°C or less than -25°C, there is excessive load on pump motor, the controller is improperly mounted, operation in extreme environment or due to thermistor failure.
Why is my Curtis 1253 Controller in LIFT LOCKOUT mode?
The Curtis Controller may be in LIFT LOCKOUT mode because it received an appropriate lift lockout signal or because the SS LOCKOUT parameter is not set correctly, resulting in an inappropriate lift lockout signal.
What does 'CONT DRVR OC' mean on my Curtis Controller?
The error 'CONT DRVR OC' on your Curtis Controller indicates that the main contactor coil is shorted or the controller is defective.
Why does my Curtis 1253 Controller display 'MAIN CONT DNC'?
Your Curtis Controller may be showing 'MAIN CONT DNC' because the main contactor coil connection is loose, the main contactor did not close, or the CONT CNTRL parameter is not set correctly.
What causes a PRECHARGE FAULT on a Curtis 1253?
A PRECHARGE FAULT on a Curtis Controller can occur due to a precharge circuit failure, or an external short or leakage between B+ and B-.
What does HW FAILSAFE mean on my Curtis Controller?
HW FAILSAFE on a Curtis Controller means that the MOSFET is shorted or the controller is defective.
General| Status LED Output Current (maximum) | 20 mA |
|---|---|
| Brake Driver Output Current (maximum) | 1 A |
| Max Motor Speed | 6000 rpm |
| Type | Motor Controller |
| Throttle Input | 0-5V |
| Storage Ambient Temperature Range | -40°C to 85°C |
| Protection Features | Overvoltage, Undervoltage, Overcurrent, Overtemperature |
Features that ensure smooth operation and reduced noise levels for the pump motor.
Highlights the controller's ability to be customized via programming devices for various applications.
Details built-in safety features and durable design aspects ensuring dependable operation.
Instructions on how to properly install and secure the controller unit in the vehicle.
Details on connecting low-voltage signals and programming interfaces to the controller.
Guidance on connecting the main power supply and motor leads to the controller.
Illustrates the typical wiring setup for common applications and lift lockout integration.
Explains how to connect various types of throttle inputs to the controller for speed control.
Covers essential external components like contactors, keyswitches, and interlock switches.
Describes settings related to motor speed, including maximum, minimum, and acceleration rates.
Details settings for throttle input types, deadband, maximum output, and mapping.
Explains how the controller handles multiple speed requests from switches and throttles.
Covers settings related to system faults, lockouts, and error detection mechanisms.
Defines thresholds and rates for voltage cutback to protect the system from low battery conditions.
Settings for controlling the main contactor, including pull-in and holding voltages.
Specifies the maximum current the controller can supply to the pump motor.
Procedure to verify proper installation and functionality before initial operation.
Method for testing and configuring the controller outside the vehicle.
How to use the programmer to diagnose faults and monitor system status.
Interpreting status LED codes for fault identification and system feedback.
Routine maintenance instructions for cleaning the controller exterior.
Accessing and managing the controller's logged fault data for troubleshooting.
Design considerations for managing radio frequency emissions and immunity.
Guidelines for protecting the controller from static discharge damage.
Information about using the PC-based software for controller programming.
Details on using the portable handheld device for controller configuration.
Overview of capabilities provided by Curtis programming devices.
Describes the parameters available for configuration through the programmer.
Details the real-time system data that can be viewed using the programmer.
Technical specifications and operating parameters for the 1253 controller model.
