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Hefei Huiwo Digital Control Equipment Co., Ltd.

Jungheinrich Error Code 1901 «PLUS · TIPS»

: Ensure no travel direction (forward or reverse) is selected during startup if the model requires neutral for initialization.

Jungheinrich drive controllers require a stable 24V, 48V, or 80V (depending on model) supply. When battery voltage drops below the controller’s minimum threshold (e.g., 20V on a 24V system), the microcontroller inside the drive controller resets or stops sending CAN messages.

Either the wiring fault is intermittent (false hope) or the sensor resistance is borderline – fine at startup but drifts out of range when warm.

: Ensure no travel direction (forward or reverse) is selected during startup if the model requires neutral for initialization.

Jungheinrich drive controllers require a stable 24V, 48V, or 80V (depending on model) supply. When battery voltage drops below the controller’s minimum threshold (e.g., 20V on a 24V system), the microcontroller inside the drive controller resets or stops sending CAN messages.

Either the wiring fault is intermittent (false hope) or the sensor resistance is borderline – fine at startup but drifts out of range when warm.