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Manual Activation
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Manual Activation
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You will need:
: Resting a foot on the accelerator pedal when turning the key switch clockwise.
Turn the key to the "ON" position again, ensuring the pedal remains untouched. Step 3: Inspect the Pedal Sensor and Wiring
The machine fails to move when the throttle is engaged.The display alternates between the hour meter and the 1901 code.The lift and lower functions may be disabled.The error may be intermittent, occurring only when the tiller is moved to specific angles. Step-by-Step Troubleshooting Checklist Jungheinrich Error Code 1901
Diagnostic checklist — step-by-step (work from low-risk to higher-risk checks)
Turn the key off, wait for the display to die completely (about 5-10 seconds), ensure feet are clear, and turn the key back on. 2. Physical Inspection
: Damaged or loose wiring between the pedal and the traction controller can trigger false startup signals. You will need: : Resting a foot on
Inspect sensors for cleanliness and proper function. Cleaning or replacing sensors may resolve the issue.
Before calling a technician, try these immediate measures: 0;16; 0;265;0;45d;
Step 4: Check the Brake and Direction Switches (Related Systems) Inspect sensors for cleanliness and proper function
Issues with the machine's electrical circuitry, such as short circuits, faulty sensors, or problems with the control unit, can also lead to Error Code 1901.
Symptoms to expect
Error Code 1901 on a Jungheinrich machine typically relates to a specific malfunction or condition that needs to be addressed. While the exact definition can vary slightly depending on the model and software version of the machine, it often points to issues with the machine's hydraulic or electrical systems.