Jungheinrich Eje 120 Error Code 4372 Work

A lead-acid battery older than 4 years in heavy use is suspect. Even if it passes a simple voltage test, its internal resistance may be high enough to fool the controller. Replace it.

On the Jungheinrich CAN-Bus system (Controller Area Network), error 4372 typically translates to:

"Work switch, circuit fault – Plausibility error or short circuit to ground/battery." jungheinrich eje 120 error code 4372 work

In plain English: The main controller (ESC, or Electronic Speed Controller) has detected an electrical inconsistency in the circuit that commands the hydraulic pump to lift the forks. The "Work" in this context refers to the lift function (as opposed to the "Travel" drive function).

The EJE 120 uses a "work contactor" or solid-state relay to engage the hydraulic pump motor. Code 4372 indicates that the feedback from this circuit does not match the command given by the controller. A lead-acid battery older than 4 years in

After cross-referencing Jungheinrich’s proprietary diagnostic manuals (JMG / JSM files) and field service bulletins, Error Code 4372 is defined as:

"Lift controller: Supply voltage (U-Batt) below permissible threshold during hydraulic operation – Plausibility error detected between lift motor current feedback and expected load profile." "Work switch, circuit fault – Plausibility error or

In plain English: When the operator attempts to lift a load, the lift pump controller detects that the battery voltage drops too low too quickly. Furthermore, the current being drawn by the lift motor does not match what the computer expects based on the weight being lifted.

This is a protective code. The system shuts down the lift function to prevent deep discharge of the battery or thermal damage to the lift motor and contactors.

The EJE 120 typically uses a 24V lead-acid or lithium-ion battery. If the battery voltage drops below 20V under load (lifting), the controller triggers code 4372. A battery with a dead cell will show good resting voltage (e.g., 24.5V) but collapse to 18V under load.