**Maintenance and Troubleshooting Guide for the Balance**
The balance must be handled with care. The pan and outer casing should be gently cleaned with a soft cloth. Avoid using strong solvents, as they may damage the surface.
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### **Failure and Elimination**
| No. | Failure | Reason | Solution |
|-----|---------|--------|----------|
| 1 | The display is not lit at all | - The balance is not properly connected to the power supply
- The balance display switch is not open
- Instantaneous signal interference
- Adapter is faulty
- Host panel is faulty | - Power on the device
- Press the "Start" button
- Reboot the balance or re-plug the power cord
- Replace the adapter
- Replace the host panel | | 2 | Only shows " " on the upper line segment | - Exceeds maximum load
- Internal memory calibration data is corrupted
- Weighing plate is not installed | - Reduce the load immediately
- Recalibrate the balance according to the "Calibration Balance" procedure. Place the standard weight on the pan and wait about 8 seconds for stabilization.
- Reinstall the weighing plate | | 3 | Only shows " " on the lower line segment | - Weighing plate is not installed
- No object on the weighing pan and no light
- Limit screw is loose | - Reinstall the weighing pan
- Check the sensor | | 4 | Weighing display value is unstable (data jitter) | - Airflow present
- Worktable is unstable
- Short balancing time
- Temperature fluctuations in the room | - Close the windproof door of the balance
- Place the balance on a stable workbench
- Increase integration time if possible
- Control the room temperature | | 5 | Weighing results are inaccurate | - Not tared before weighing
- Balance not calibrated or calibration weight is incorrect
- Incorrect power supply voltage | - Press the "Tare" button
- Recalibrate the balance
- Use the correct power supply
- Check four-corner error | | 6 | Display shows a certain digit or meaningless symbol | - External interference
- Incorrect power supply voltage | - Restart or re-plug the power
- Use the correct power supply | | 7 | Stable mark “0†on the left side of the display does not disappear | - Balance is too sensitive
- Poor environmental conditions (e.g., large airflow, vibrations, temperature changes) | - Select a more stable environment
- Improve the placement area | | 8 | Always shows "– –" (wait state) | - Poor environmental conditions
- Balance is too sensitive | - Change the environment
- Adjust sensitivity to third gear | | 9 | Displays "Err--1" or "Err - 2" | - Instantaneous interference
- Balance is faulty | - Reboot or re-plug the power
- Send to inspection unit for further checks; replace module or ICs such as 93C46 or 16V8D | | 10 | Shows "CAL" or "Err" | - Objects left on the weighing pan before calibration
- Calibration weight is incorrect
- Not tared before calibration
- Pressed calibration button without entering weighing mode | - Remove objects and reset calibration
- Use accurate calibration weights
- Tare the balance before calibration
- Enter weighing mode first | | 11 | The rightmost weighing unit is not displayed | - Balance not calibrated
- Internal memory calibration data is lost | - Calibrate the balance
- Reset calibration data
- Check for sensor damage | | 12 | Displays "Cou--Err" | - No preset constants during point operation
- Too much weight when preset over constant
- Too little weight when preset over constant | - Perform average point preset operation
- Calibrate the balance if necessary | | 13 | No display at all | - Faulty adapter
- Faulty panel
- Faulty motherboard
- Power board damaged | - Replace the adapter
- Replace the control panel
- Replace the motherboard | | 14 | Weighing weakness | - Photocell board is broken | - Replace the photocell board | | 15 | Jumps to a word or shows erratic behavior | - Foreign matter in the sensor | - Clean foreign material from the magnetic steel | --- Regular maintenance and proper handling can significantly extend the life of the balance and ensure accurate measurements. If any issues persist after following the troubleshooting steps, it is recommended to contact a qualified technician for further assistance.
- The balance display switch is not open
- Instantaneous signal interference
- Adapter is faulty
- Host panel is faulty | - Power on the device
- Press the "Start" button
- Reboot the balance or re-plug the power cord
- Replace the adapter
- Replace the host panel | | 2 | Only shows " " on the upper line segment | - Exceeds maximum load
- Internal memory calibration data is corrupted
- Weighing plate is not installed | - Reduce the load immediately
- Recalibrate the balance according to the "Calibration Balance" procedure. Place the standard weight on the pan and wait about 8 seconds for stabilization.
- Reinstall the weighing plate | | 3 | Only shows " " on the lower line segment | - Weighing plate is not installed
- No object on the weighing pan and no light
- Limit screw is loose | - Reinstall the weighing pan
- Check the sensor | | 4 | Weighing display value is unstable (data jitter) | - Airflow present
- Worktable is unstable
- Short balancing time
- Temperature fluctuations in the room | - Close the windproof door of the balance
- Place the balance on a stable workbench
- Increase integration time if possible
- Control the room temperature | | 5 | Weighing results are inaccurate | - Not tared before weighing
- Balance not calibrated or calibration weight is incorrect
- Incorrect power supply voltage | - Press the "Tare" button
- Recalibrate the balance
- Use the correct power supply
- Check four-corner error | | 6 | Display shows a certain digit or meaningless symbol | - External interference
- Incorrect power supply voltage | - Restart or re-plug the power
- Use the correct power supply | | 7 | Stable mark “0†on the left side of the display does not disappear | - Balance is too sensitive
- Poor environmental conditions (e.g., large airflow, vibrations, temperature changes) | - Select a more stable environment
- Improve the placement area | | 8 | Always shows "– –" (wait state) | - Poor environmental conditions
- Balance is too sensitive | - Change the environment
- Adjust sensitivity to third gear | | 9 | Displays "Err--1" or "Err - 2" | - Instantaneous interference
- Balance is faulty | - Reboot or re-plug the power
- Send to inspection unit for further checks; replace module or ICs such as 93C46 or 16V8D | | 10 | Shows "CAL" or "Err" | - Objects left on the weighing pan before calibration
- Calibration weight is incorrect
- Not tared before calibration
- Pressed calibration button without entering weighing mode | - Remove objects and reset calibration
- Use accurate calibration weights
- Tare the balance before calibration
- Enter weighing mode first | | 11 | The rightmost weighing unit is not displayed | - Balance not calibrated
- Internal memory calibration data is lost | - Calibrate the balance
- Reset calibration data
- Check for sensor damage | | 12 | Displays "Cou--Err" | - No preset constants during point operation
- Too much weight when preset over constant
- Too little weight when preset over constant | - Perform average point preset operation
- Calibrate the balance if necessary | | 13 | No display at all | - Faulty adapter
- Faulty panel
- Faulty motherboard
- Power board damaged | - Replace the adapter
- Replace the control panel
- Replace the motherboard | | 14 | Weighing weakness | - Photocell board is broken | - Replace the photocell board | | 15 | Jumps to a word or shows erratic behavior | - Foreign matter in the sensor | - Clean foreign material from the magnetic steel | --- Regular maintenance and proper handling can significantly extend the life of the balance and ensure accurate measurements. If any issues persist after following the troubleshooting steps, it is recommended to contact a qualified technician for further assistance.
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