Fault handling
Fault manifestation 1: No display of cement packaging machine data
Possible reasons: 1. Power failure or insufficient power supply (referring to an open circuit in the middle, such as a broken fuse); 2. The display circuit is damaged.
Solution: 1. Check the power supply and fuse; 2. Check the internal circuit.
Fault manifestation 2: Cement packaging machine does not count or alarm
Possible reasons: 1. Power failure; 2. Signal line interruption; 3. Device damage.
Solution: 1. Check the internal circuit; 2. Check if the power supply is in place; 3. Test IC04 and IC2004, etc.
Fault manifestation three: The electromagnetic coil of the cement packaging machine does not engage
Possible reasons: 1. Line interruption; 2. The electromagnetic coil is burnt out; 3. Internal malfunction of the host; 4. Mechanical issues.
Solution: 1. Check if there are any signs of power on the electromagnet and eliminate mechanical blockage; 2. Check the electromagnetic fuse tube; 3. Check whether the fault is internal or external to the host; 4. Check internal power supply, SSR, IC2004, etc.
Fault manifestation four: Chaotic data display of cement packaging machine
Possible reasons: 1. Low or unstable voltage; 2. Virtual connection of power supply or related lines; 3. The display circuit is damaged.
Solution: 1. Power on again; 2. Explore and test the internal power supply situation; 3. Check and replace IC138, computer, etc.
Fault manifestation five: In the weighing state, the display shows a uniform negative growth with increasing external force
Possible cause: reversed polarity of sensor input or output
Solution: Proofreading again
Fault manifestation six: In the weighing state, the display shows no change or abnormal change with the increase of external force
Possible reasons: 1. Line interruption or incorrect connection; 2. Supply bridge voltage fault; 3. Sensor damage; 4. Other internal faults of the host.
Solution: 1. Temporarily connect a good sensor and identify the fault point; 2. Further detect the load signal of sensors, connections, or hosts from 1; 3. Further detect the supply bridge and amplification circuit or computer output display circuit from the latter of 2.
Fault manifestation seven: The display does not return to zero after resetting, showing - FF. F or not resetting
Possible reasons: 1. The offset exceeds the zero point and tracking range, and the preload exceeds the limit; 2. Line interruption or incorrect connection; 3. The reset switch is damaged; 4. Other internal faults of the host.
Solution: 1. Adjust the levelness of mechanical components, especially spring plates; 2. Adjust the reference potentiometer; 3. Test whether the circuit is faulty; 4. Remove the host and apply a reset signal through internal short circuiting to determine whether the fault is located inside the host or from the switch.
Fault manifestation 8: Poor system repeatability and unstable bag weight
Possible reasons: 1. Poor mechanical repeatability; 2. Random external forces such as human touch or improper operation can cause unstable operation; 3. Problems with initial installation or supporting equipment.
Solution: 1. Carefully observe and adjust according to the principles of mechanical maintenance; 2. Clear interference and operate correctly; 3. Re calibrate the electrical system; 4. Conduct overall renovation of the equipment.
Fault manifestation 9: Misalignment of calibration meter, setting or reference potentiometer
Possible reasons: 1. Interruption of related connections; 2. Three terminal voltage regulator failure; 3. Preloading exceeds the limit; 4. Damage to voltage regulators, potentiometers, etc.
Solution: 1. Adjust the mechanical components, especially the levelness of the spring; 2. Check the status of the line; 3. Check the power supply and voltage regulator.
