JL4 Vacuum Loader  
Issues > Check/Troubleshooting
Conveying Blower does not rotate
  1. Controller light indicator does not light up.
  2. Controller "Feeder" does not light up.
  3. Wear on contact point of electromagnetic switch in control panel.
  4. Error code "E3" is displayed on the controller.
  5. Controller "Feeder" lights up but blower does not run.
  6. Material Detector not functioning normally.

1. Controller light indicator does not light up.
  1. Primary power may not be on, or power breaker may not be turned ON.
  2. Fuse in control panel may be off.
  1. Turn primary power and power breaker (on side of controller) on.
  2. Check to see if fuse (F-1) in control panel is off.
  3. If fuse is off, replace and turn power on. *Fuse: 250V, 1A.
    *If fuse cuts off immediately after replacement, there may be a short-circuit.
    Please contact your local Matsui office for service.
If problem persists
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2. Controller "Feeder" does not light up.
Feeder will start after pressing RUN/STOP switch of conveying direction in use.
If there are no indications, press RUN/STOP switch.
If problem persists
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3. Wear on contact point of electromagnetic switch in control panel.
Electromagnetic switch will not function if contact point is worn.
  1. Check to find any weld damages and wear on contact points.

  2. Replace with switch if contact points are worn.
Electromagnetic Switch Orders
Electromagnetic Switch Replacement
If problem persists
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4. Error code "E3" is displayed on the controller.
Error will occur when overload current runs in blower and overload relay to switch trips.

(Reference) Operation will automatically stop.
Start work after stopping operation and check that breaker is off.
Those who do not have sufficient mechanical/electrical knowledge should not do any maintenance work requiring disassembly or repairing due to risk of injuries and dangers of work.
  1. Check to see if electromagnetic switch does not have a thermal trip.

    *Click here for overload causes


  2. After repairing overload in blower, press reset button on thermal relay.
    *After pressing reset on the relay, E3 will automatically recover.
If problem persists
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5. Controller "Feeder" lights up but blower does not run.
1. If contacts on electromagnetic switches are worn, feeder will not run.
2. If there are no signals output from the switch to the control board, feeder will not run.
Start work after stopping operation and check that breaker is off.
Those who do not have sufficient mechanical/electrical knowledge should not do any maintenance work requiring disassembly or repairing due to risk of injuries and dangers of work.
  1. See Wear on contact point of electromagnetic switch in control panel.


  2. See if electromagnetic switch is on while feeder is on.




  3. When ON, click here.

  4. If switch is not on, either the signals from the main board are not being sent out or the electromagnetic coil is damaged.
    If either is the case, replace either the switch or the controller.

If problem persists
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6. Material Detector not functioning normally.
1. Material Detector will not turn on when supplier material is low.
  1. Select from the following switches and adjust accordingly.

[Level Meter]

Click here for adjusting sensitivity
Level Meter ORDER


[Proximity Switch]

Click here for adjusting sensitivity
Proximity Switch ORDER


[Limit Switch]

Click here for adjusting sensitivity
Limit Switch ORDER

If problem persists
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