Jungheinrich is a well-known German manufacturer of material handling equipment, including forklifts, pallet trucks, and warehouse equipment. Their machines are widely used in logistics and warehousing operations globally. However, like any complex machinery, Jungheinrich equipment can sometimes encounter errors or faults that disrupt operation. This report focuses on one such error, the Jungheinrich Error Code 0802.
: Check the main chassis ground for any loose bolts or rust. Machine Maxx USA 3. Test the Main Contactor
Verify if the truck's serial number registers accurately or shows as completely blank.
If a small ignition contactor (e.g., part 52018885) or a main fuse blows, power never reaches an individual controller, keeping it dark during the network roll call.
A low battery can cause erratic behavior in electronic sensors and controllers. Step-by-Step Troubleshooting Guide jungheinrich error code 0802
: If the main contactor is worn or has poor contact, it may not pass sufficient voltage to the controller, triggering the 0802 alarm. Loose or Damaged Wiring
Troubleshooting Jungheinrich Error Code 0802: A Complete Guide
: A sub-index that often points to a "timeout" or lack of communication between specific internal modules. Troubleshooting Guide
If one or more of these essential controllers fails to respond within a specific millisecond window during startup, or if the data packet stream is corrupted, the system generates as a protective safety measure. 2. Primary Causes of Error Code 0802 Jungheinrich is a well-known German manufacturer of material
These cases highlight that while the error code points to a communication problem, the root cause can range from a faulty contactor and damaged sensor to a software mismatch on a critical control board.
Visually inspect the hydraulic manifold for any loose connections. When to Call a Professional
If you are unfamiliar with the CANbus system or electrical components, it is strongly recommended to contact a certified Jungheinrich technician to avoid damaging the controllers.
Because the motor temperature is critical for preventing overheating and damage, the safety logic of the Jungheinrich truck will intervene when this error appears. Typically, this results in: This report focuses on one such error, the
Jungheinrich’s proprietary software allows you to view the live resistance value from the sensor. If the software shows a fixed value (e.g., always 9999 Ω or always 0 Ω) while the motor is cold, the controller is not receiving a plausible signal. You can also perform an actuator test to bypass the sensor – if the error clears, the sensor is faulty.
A: That points directly to an electrical fault (broken wire, bad connector, or dead sensor) rather than a real temperature problem. Follow the measurement steps above.
Understanding Jungheinrich Error Code 0802: Causes, Symptoms, and Solutions
Disconnect the battery and measure the resistance across the CAN-High and CAN-Low lines. A healthy, fully connected CAN network should read roughly due to its two parallel 120-Ohm terminating resistors. If your meter displays 120 Ohms , it reveals a physical break in the network loop line. Step 4: Validate Battery State of Health