1. Observe Operating Status and Identify Abnormal Phenomena
Check the control panel for alarms (e.g., "overload," "sensor failure," "abnormal temperature").
Observe the equipment for abnormal sounds (e.g., metal friction, pump running dry), leaks (dye liquor, steam), temperature fluctuations, or circulation interruptions.
Record the process parameters (temperature, time, liquid level, pressure) at the time of the fault for later analysis.
2. Immediately Disconnect Power to Ensure Operational Safety
If serious abnormalities are detected (e.g., smoke, electrical leakage, severe vibration), press the emergency stop button to disconnect the main power supply.
If the fault is electrical, disconnect the power first before troubleshooting to avoid electric shock or further damage.
3. Check Each System Item to Narrow Down the Fault
🔧 Mechanical System
Check if the drive chain is loose or skipping teeth, and if the bearings are stuck or overheating.
Observe if the drum rotates smoothly and if the lubrication system is lacking oil.
🌡️ Temperature Control and Heating System
Check for scaling and aging of the heating element, and the responsiveness of the cooling valve.
Verify that the temperature sensor is not malfunctioning and that the temperature control accuracy does not exceed ±2℃.
💧 Circulation and Sealing System
Check that the main pump is working properly, the filter is not clogged, and the nozzles are not blocked by fibers or lint.
Check the cylinder doors, pipe joints, and the seals between the cylinder and pipe for aging or damage to prevent leaks and short circuits.
⚙️ Control System and Electrical Components
Restart the PLC and touchscreen to rule out program freezes or temporary crashes.
Check for oxidation and loosening of wiring terminals, and whether the motor insulation resistance has decreased.
4. Use tools to accurately locate the problem
Use a multimeter to measure voltage and current to determine if the motor or sensor is damaged.
Use a pressure gauge to check if the system pressure is stable and troubleshoot valve sealing issues.
Compare historical data to determine whether the fault is intermittent or recurring.
5. Review the troubleshooting process to prevent recurrence. After troubleshooting, record the cause, handling method, and replaced parts, and improve maintenance records.
Analyze whether the problem was caused by improper operation, lack of maintenance, or aging parts, and optimize subsequent maintenance plans.
