Step 1: Check whether the circuits of the hydraulic lift show signs of aging, exposure, or damage.
Step 2: After switching on the power supply, check whether the indicator lights on the electrical control box of the hydraulic lift are functioning properly. Rule out short circuits in the power supply, which will generate a large short-circuit current and burn out the fuse element. This type of fault is quite obvious and can be detected and eliminated during circuit analysis.
Step 3: Conduct no-load and load tests on the hydraulic lift to check whether the relays can open and close smoothly. When the contacts are welded together, the switch fails to release continuously. This kind of short circuit does not produce a large current and will not damage the fuse.
Specific Methods: Common manifestations of circuit faults include loose connections, poor contact of switches and contact points, broken wires, or damaged components. These faults can be inspected using a multimeter.
① In the event of a circuit fault on the hydraulic lift, report the issue immediately and provide timely feedback to the relevant departments and the manufacturer.
② When testing the hydraulic lift with the voltage range of a multimeter, switch on the power supply and measure the voltage according to the circuit schematic diagram. Identify and analyze the fault point based on the measured voltage values.
③ When testing with the resistance range, disconnect the power supply first, then take measurements according to the circuit schematic diagram. Analyze the fault point based on the measured resistance values.
④ When using a multimeter to troubleshoot hydraulic lift faults, both the resistance range and voltage range can be applied.
⑤ When inspecting by the short-circuit method, refer to the control schematic diagram of the hydraulic lift to short-circuit possible faulty contacts, switches, and other components. If the fault is eliminated after short-circuiting, the problem lies in this section. Narrow down the scope and conduct further inspection to locate the exact fault point.
⑥ On-site maintenance personnel must be present during circuit inspection to prevent safety accidents caused by unauthorized switching on and off during the inspection.