1. For faulty broken bridge aluminum door and window equipment, one should not rush to start. Instead, one should first inquire about the history and symptoms of the malfunction. For unfamiliar broken bridge aluminum door and window equipment, one should first familiarize themselves with the circuit principles and structural characteristics, and follow the corresponding rules. Before disassembling, 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 door and window equipment, a sketch should be drawn while disassembling and marked.

2. First, inspect the broken bridge aluminum door and window equipment for obvious cracks and defects, understand its maintenance history, service life, etc., and then inspect the interior of the machine Before dismantling, it is necessary to queue up for the surrounding fault factors and determine that it is an internal fault before dismantling. Otherwise, blind dismantling may cause the broken bridge aluminum door and window equipment to deteriorate over time.

3. Mechanical inspection before electrical inspection can only be carried out after confirming that the mechanical parts are free of faults 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 bridge cut aluminum door and window equipment is not powered on, judge the quality of the electrical buttons, contactors, thermal relays, and fuses of the bridge cut aluminum door and window equipment to determine the location of the fault Power on test, listen to its sound, measure parameters, diagnose faults, and finally 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 first and then repair. For heavily polluted bridge cut aluminum door and window 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.