DMZ2/DMS2 Portable Desiccant Dryer
Issues > Check/Troubleshooting
         

Alarms
Click on any of the buttons above to jump to alarm.


E0 EPROM Error
Occurs when unable to read ROM, and data is corrupted.
  1. Turn off main power supply. Wait 10 seconds. Then re-apply power and try to start the operation again.

    If alarm message appears again, the controller is damaged. Replace controller.
    Hit "CLICK!" button and check with your local service.
If problem persists
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E1 Reverse Phase
Occurs when the power cord is connected in reverse-phase.
Before starting work, turn supply power breaker off, and unplug power cord.
Always utilize the ground wire.
  1. Of the three power lines on the power cord plug, exchange two lines and re-try.
If problem persists
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E2 Dry Blower Overload
Occurs when overcurrent flows through the blower and the overload relay of the electromagnetic switch trips.
Operations will automatically stop.

  1. Bearing inside blower is deteriorating.
  2. Thermal setting values not set correctly.
  3. Check to see if the motor relay (EM Switch) connection is worn or not.
 
  1. Was there any abnormal noises coming from the blower before the alarm?
    Noise may come from the blower when the grease in the bearing deteriorates.
    If a noise was made, replace bearing or blower.
    Click on CLICK buttons and contact your local Matsui service center.
  2. Check the thermal setting value in the control panel.
    DMZ2/DMS2 Thermal Value Using as reference, check to see if the correct values are being used.
  3. Check to see if the motor relay (EM Switch) connection is worn or not.
    Motor Heater Damage Inspection Using as reference, check to see if relay is in single phase or not.
Blower Order
If problem persists
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E4 Drying / Regen. Upper limit alarm
Occurs when the drying / regeneration temperature exceeds the set-value + the upper limit setpoint.
Operation will stop automatically.

  1. Drying / Regeneration Line Filter is clogged.
  2. Temperature Upper Limit setting is not adequate.
 
  1. Check to see if Drying/Regeneration Filters are clogged or not.
    If clogged, air will not circulate and may lead to overheating.
    Either clean or replace the Drying/Regenerate Filters.
  2. Check the upper temperature setpoint.
    By pressing the SV switch for more than five seconds, you can access the Engineering Setting Mode. Display will change every time the SV switch is pressed during this mode.
    1. Hold SV switch down for more than 5 seconds.
    2. Push the SV switch until dUS appears. (upper limit temperature alarm)
    3. Change the setting value.

      [Point]
        Setting Range 0 ~ 104 degrees F /
      0 ~ 40 degrees C
      Original Setting 18 degrees F /
      10 degrees C
      Engineering Setting Mode Parameters
If problem persists
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E5 Broken Drying Sensor
Occurs when the drying thermocouple (K-type) for the process (hopper) temperature controller is broken. Operation stops automatically.
Before inspecting, stop the operation of unit. After the cooling timer has stopped completely, turn the power breaker off and wait until heated areas have cooled off.
  1. Check to see if either the thermocople (K-type) is bent, damaged or if wiring is disconnected.
    If bent or damaged, replace sensor.
Sensor Order
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E6 Regenerate Sensor Malfunction
Occurs when wiring or drying thermocouple (CA sensor) for the process (hopper) temperature controller is broken. Operation stops automatically.
  1. Check to see if either the thermocople (CA sensor) is bent, damaged or if wiring is disconnected.
    If bent or damaged, replace sensor.
If problem persists
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E10 Drying/Regeneration Overheat Alarm
Occurs when drying/regeneration temperature in heater box rises past probe/sensor settings.

  1. The setting value of the dry heat thermostat, at the side of the drying heater box, is not adequate.
  2. Drying/Regenerate Line Filter is clogged.
  3. SSR is not functioning normally (tester use).
 
  1. Check the settings of the dry overheat thermostat.
    Set thermostat at +15 - 20 degrees C

    If nothing changes even after adjusting the settings:
    1. Check for disconnections.
    2. Thermostat may be damaged.

  2. Check to see if the Drying/Regenerate Filters are clogged.
    If clogged, air will not circulate, potentially leading to overheating.
    Check clogging on each filter.



    If dirty or clogged, clean out particles by blowing clean dry air in filter.


    [Point]
    1. When blowing dry air, always wear a mask. Particles will scatter in air during cleaning.
    2. After cleaning, set the filter back in position securely.
    3. If badly clogged, replace with new filter.
    4. When cleaning or replacing, turn off operation switch and make sure the blower has completely stopped before starting.

  3. Check to see if SSR is abnormal.
    Heater contacters use SSR but they can be damaged from short-circuits or rise in temperature of enviroment.
    SSR (solid state relay) Inspection for reference to check SSR.
Regenerate Filter
Drying Filter
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