1. Purpose
This standard operating procedure (SOP) is formulated to standardize the inspection, troubleshooting and maintenance operations of the multi-screen vacuum laminator. It helps staff quickly judge common equipment faults, reduce downtime, and ensure stable and consistent machine operation.
2. Scope of Application
Applicable to daily operation, maintenance and after-sales troubleshooting of multi-screen vacuum laminator.
3. General Safety Requirements
Cut off power and air source before inspecting internal components.
Do not adjust valves or parameters during machine running.
Ensure the equipment is fully static and pressure relieved before maintenance.
4. Standard Troubleshooting Procedure (Common Faults & Solutions)
4.1 Vacuum Cylinder Runs Too Fast or Too Slow
Fault Phenomenon: The vacuum cylinder moving speed is abnormal during lamination operation.
Troubleshooting Steps:
1.Locate the two speed regulating valves at the rear of the machine.
2.Slowly adjust the corresponding throttle valve of the vacuum cylinder.
3.Test run the machine and adjust to a stable and standard operating speed.
4.2 Vacuum Cylinder Fails to Descend
Fault Phenomenon: The vacuum cylinder cannot perform descending action normally.
Troubleshooting Steps:
1.Check whether the sensor interface and wiring are intact and firmly connected.
2.Manually test the cylinder descending function to confirm mechanical smoothness.
3.Check the vacuum pump operation status to ensure normal air supply and vacuum power.
4.Restart the equipment after inspection and verify normal operation.
4.3 Vacuum Degree Cannot Reach Standard Value
Fault Phenomenon: The vacuum gauge cannot reach the required vacuum pressure during working.
Troubleshooting Steps:
1.Check the sealing condition of the sealing cylinder during machine operation to avoid air leakage.
2.Confirm that the vacuum pump operates normally without abnormal noise or pressure loss.
3.If the equipment is used in plateau areas, low atmospheric pressure may cause insufficient vacuum; adjust parameters accordingly.
4.4 Heating System Insensitive / Slow Response
Fault Phenomenon: The heating system responds slowly or cannot adjust temperature normally.
Troubleshooting Steps:
1.Enter the temperature control system interface.
2.Check whether the temperature controller displays and works normally.
3.Recalibrate temperature parameters if deviation occurs.
4.5 Vacuum Oil Cylinder Speed Abnormal (Too Fast / Too Slow)
Fault Phenomenon: The operating speed of the vacuum oil cylinder is unstable or out of standard range.
Troubleshooting Steps:
1.Locate the throttle valve installed on the corresponding cylinder.
2.Readjust the throttle valve to the correct standard position.
3.Test machine operation until the cylinder speed becomes stable.
4.6 Vacuum Degree Does Not Meet Technical Requirements
Fault Phenomenon: The vacuum gauge reading fails to meet the production standard.
Troubleshooting Steps:
1.Refer to the original vacuum gauge instruction manual.
2.Perform parameter resetting, calibration and adjustment.
3.Confirm the vacuum degree reaches the specified standard before production.
4.7 Heating System Fails to Heat Up
Fault Phenomenon: The heating system shows no temperature rise after startup.
Troubleshooting Steps:
1.Power off the equipment for safety inspection.
2.Check whether the connection terminals of heating tube and temperature controller are loose, broken or damaged.
3.Replace damaged parts if necessary.
4.Power on again and test the heating function.
5. Maintenance Record Requirement
All fault inspection, adjustment and replacement operations shall be recorded in the equipment maintenance log for traceability and future after-sales support.
6. Abnormal Handling Principle
If the fault cannot be solved according to this SOP, stop operation immediately and contact the supplier’s technical support team for professional guidance.
