Error Code 1901 _hot_ - Jungheinrich

Troubleshooting Jungheinrich Error Code 1901: Causes and Solutions 0;16; 0;735;0;ad0;

: Drive pedal (accelerator) is pressed or stuck while the truck is starting up.

A qualified technician should use a Jungheinrich diagnostic tool to check the "pedal value" in the controller. If the value is not at zero when the pedal is idle, the potentiometer needs adjustment or replacement. 4. Controller Reset Sometimes the error code is "latched" in the memory. Jungheinrich Error Code 1901

Disclaimer: This information is for informational purposes only. Always refer to your specific Jungheinrich machine manual and consult authorized service technicians for repair work. If you'd like, I can: Tell you how to check for Provide steps to reset the service code Explain how to check the pedal return spring

If you have access, ensure the connector to the drive pedal assembly is seated firmly and free of moisture or corrosion. 0;2a; Always refer to your specific Jungheinrich machine manual

The most frequent cause is simple habit. If an operator rests their foot on the accelerator pedal or begins depressing it while simultaneously turning the ignition key or entering their PIN into the Jungheinrich ISM Online portal, the system recognizes a "high pedal" condition and locks out. 2. Mechanical Pedal Malfunctions

Code 1901 indicates a between the traction controller (drive motor inverter) and the main control unit (MCU / vehicle master). The drive unit is not receiving the expected cyclic messages. the return spring may be faulty.

Over time, debris, dust, or physical wear can degrade the pedal housing:

Physically lift the pedal with your foot to see if it moves higher. If it does, the return spring may be faulty. 3. Check for Miscalibration (Technical)

If paired with 1900, your motor may truly be overheating.

The VDI controller, sensing silence, triggered the timeout and slapped the 1901 code on the screen to protect the driver.