1. For faulty broken bridge aluminum equipment, one should not rush to start, but should first inquire about the history and symptoms of the fault. For unfamiliar broken bridge aluminum equipment, one should first familiarize themselves with the circuit principles and structural characteristics, and follow the corresponding rules. Before dismantling, it is necessary to fully familiarize oneself with the function, position, connection method, and relationship with other surrounding components of each electrical component. In the absence of an electrical assembly diagram for the broken bridge aluminum equipment, sketches should be drawn and marked while dismantling.

2. External first, then internal: The broken bridge aluminum equipment should be checked for obvious cracks and defects, and its maintenance history, service life, etc. should be understood before inspecting the interior of the machine. Before dismantling, the surrounding fault factors should be queued up to determine if it is an internal fault before dismantling. Otherwise, blind dismantling may cause the broken bridge aluminum equipment to deteriorate over time.

3. Mechanical first, electrical later: Only after confirming that there are no faults in the mechanical parts, can electrical inspections be carried out. When checking for circuit faults, detection instruments should be used to locate the faulty area. After confirming that there are no poor contact faults, the operation relationship between the circuit and the machinery should be checked in a targeted manner to avoid misjudgment.

4. Static first, then dynamic: When the broken bridge aluminum equipment is not powered on, determine the quality of the electrical buttons, contactors, thermal relays, and fuses of the broken bridge aluminum equipment to determine the location of the fault. Power on test, listen to its sound, measure parameters, determine faults, and then carry out maintenance. If it is impossible to distinguish the three-phase voltage value when the motor is in phase loss, one should listen to its sound and measure the relative ground voltage separately to determine which phase is missing.

5. Clean before repairing: For heavily polluted bridge aluminum equipment, clean its buttons, wiring points, and contact points first, and check if the external control keys are malfunctioning. Many faults are caused by dirt and conductive dust blocks, and once cleaned, the faults are often eliminated.

6. Power supply first, equipment later: The failure rate of the power supply part is very high in the failure of bridge broken aluminum equipment, so repairing the power supply first can often achieve twice the result with half the effort.

7. Common first, then special: Broken bridge aluminum equipment failures caused by assembly component quality or other faults generally account for about 50% of common failures. The special electrical faults of broken bridge aluminum equipment are mostly soft faults, which require experience and instruments to measure and repair.

8. Peripheral first, then internal: Do not rush to replace damaged electrical components. Consider replacing damaged electrical components only after confirming that the peripheral device circuit is normal.

9. DC first, AC later: During maintenance, it is necessary to first check the static operating point of the DC circuit, and then the dynamic operating point of the AC circuit.

10. Fault first and then debugging: For the bridge cutoff aluminum equipment with both debugging and fault, the fault should be eliminated before debugging. The debugging must be carried out under the premise of electrical line speed.