Jungheinrich uses a structured five-digit system for fault codes (FEXXS). In the case of :

The traction motor is equipped with a or an NTC (Negative Temperature Coefficient) sensor to monitor winding temperature. The controller (e.g., Jungheinrich FSF or ZAPI AC-2/AC-3) sends a low-voltage reference signal through this sensor.

A certified technician will have the Jungheinrich “Diagnostic System (JDS)” and full parts documentation, reducing guesswork and downtime.

: Use a digital multimeter (DMM) to check the input voltage at the display or controller. Ensure the battery is fully charged and the main fuses are intact.

: Indicates multiple areas or the general electrical system are affected.