The maintenance of the control box of the stage electric hoist is of crucial importance. The following are the specific key points: Daily Maintenance - **Exterior Cleaning**: Regularly wipe the outer shell of the control box with a clean and soft damp cloth to remove dust, stains, and debris from the surface, keeping the appearance of the control box clean. For stubborn stains, a mild detergent can be used, but avoid the detergent from flowing into the interior of the control box. - **Inspection of Connection Components**: Before and after each use, check all the connection parts of the control box, including the plugs and sockets of the power cord and control lines, to ensure that the connections are secure without any looseness or disconnection. Check whether the fixing parts such as screws and nuts are loose. If loose, tighten them in a timely manner. - **Function Testing**: Before each use, conduct a simple test of the various functions of the control box, such as whether the start, stop, lifting, lowering, and speed - changing functions are normal. Check whether the indicator lights can correctly display the working status, and whether the buttons can respond accurately after being pressed. If any problems are found, troubleshoot and repair them in a timely manner. Regular Maintenance - **Interior Cleaning**: Open the outer shell of the control box at regular intervals (usually 1 - 3 months, depending on the usage environment). Use compressed air or the cold - air setting of a hair dryer to blow away the dust and debris inside. Note that during the operation, avoid touching the internal electronic components and circuits to prevent damage caused by static electricity or other factors. - **Inspection of Electrical Components**: Regularly inspect the electrical components in the control box, such as contactors, relays, circuit breakers, and frequency converters, to check for any abnormal phenomena such as overheating, ablation, or discoloration. Check whether the connection terminals of the components are loose. If there is oxidation or looseness, clean or tighten them in a timely manner. For components that have been used for a long time or are suspected to have problems, performance tests can be carried out to ensure their normal operation. - **Line Inspection and Arrangement**: Carefully check the lines inside the control box for any problems such as breakage, aging, or short - circuits. For the line problems found, replace or repair them in a timely manner. At the same time, arrange the lines to ensure that the layout is neat and orderly, avoiding the lines from winding around each other or rubbing against other components, and preventing malfunctions caused by line problems. - **Insulation Testing**: Use an insulation resistance tester to regularly test the insulation resistance of the electrical circuits in the control box to ensure that the insulation resistance meets the requirements. Generally, the insulation resistance should be not less than 0.5MΩ. If the insulation resistance is found to be too low, find the cause in a timely manner and take measures such as drying treatment or replacing components with poor insulation. - **Maintenance of the Cooling System**: Check whether the cooling fan of the control box can operate normally and whether the cooling holes are unobstructed. Clean the dust on the cooling fan and cooling holes to ensure good heat dissipation. For control boxes with poor heat - dissipation effects, consider adding a cooling device or improving the installation environment to prevent the electrical components inside the control box from being damaged due to overheating. Handling of Special Situations - **Treatment for Moisture Ingress**: If the control box gets wet accidentally, immediately cut off the power supply, open the control box, use a dry towel or absorbent material to dry the surface moisture, and then use the warm - air setting of a hair dryer or other drying equipment for drying treatment. After confirming that it is completely dry, conduct insulation testing and function testing again. It can be reused only after passing the tests.

- **Fault Repair**: When a fault occurs in the control box, it should be repaired in a timely manner. For some simple faults, such as a damaged button or a non - working indicator light, professional maintenance personnel can carry out replacement and repair. For complex faults, such as a short - circuit in the circuit or a frequency - converter fault, contact professional technicians or the manufacturer for repair. Do not disassemble and repair blindly to avoid causing greater damage.