Jungheinrich Eje 120 Error - Code 4372

In plain English: The truck’s main controller (the “brain”) sent a command to the drive motor inverter to turn at a specific speed (e.g., 1500 RPM). The motor’s feedback sensor (encoder) reported back a speed that was than commanded – creating a “negative deviation.” The controller calculates the difference between desired speed and actual speed. When that difference exceeds a pre-set tolerance (usually 20-30%) for a sustained period (more than 0.5 seconds), the system triggers lockout mode and displays 4372 .

He knelt by the battery compartment. The EJE 120 used a massive 24V industrial battery. The BDI was the system that told the truck how much juice was left. If the controller couldn't talk to the BDI sensor, it would default to a safety shutdown to prevent the truck from stalling with a load in the air. jungheinrich eje 120 error code 4372