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MDFD

Machine and Alarm list

 Description

Cause

Action

 Class

MDFD

Sensor regenerating

 If the regeneration sensor is not showing correct or broken wire.
  1. Broken wire / Sensor.
  2. Short circuit.
  3. Not correct connected.
  1. Check wire / Sensor, maybe exchange sensor.
  2. Check electrical diagrams.
 Alarm

MDFD

Regeneration valve position

 If the regeneration valve is placed in the wrong position then expected.
  1. Broken valve motor.
  2. Broken microswitch.
  1. Check if the signal is coming to the valve motor.
  2. Check if the signal is coming from the switch.
 Alarm

MDFD

Directional valve position

 If the directional valve is placed in the wrong position then expected.
  1. Wrong position.
  2. The directional valve motor is broken.
  1. Check if switch is going in the correct position, adjust if not.
  2. Check if the signal is coming to the valve motor. See the electrical diagram for measure points.
 Alarm

MDFD

Outlet temperature to high

 If drying temperature raises above setpoint (80C°) a warning appears. If the drying temperature raises above the 2nd setpoint (85C°), an alarm appears and the dry air blower stops.
  1. Regeneration time is too long.
  2. Valve position.
  3. Stuck contact for regen heating elements.
  1. See actions of alarm: REG. TIME 1 IS TOO LONG.
  2. Refer to the valve position.
  3. Check relay.
 Alarm

MDFD

Regeneration time too long

 If the regeneration time is longer than 60 min. on molecular sieve 1, a warning appears.
  1. Regeneration filter is blocked.
  2. Regeneration filter has been in production for more than 6 months.
  3. Heating elements defect.
  4. Setpoint depending.
  5. Not sufficient water flow or water temperature in regeneration air cooler *ht/lt version.
  6. Material flow in the hopper is too high.
  7. Leakages in pipes/hoses.
  1. Clean regenaration filter.
  2. Replace regeneration filter.
  3. Check the current for each heating element.
  4. Check if there is a sufficient water flow coming in and going out of the regeneration air cooler.
  5. Check moisture level in the material.
  6. Check pipes and hoses for leakages.
 Warning

MDFD

Phase order incorrect

 If the phase order is incorrect an alarm appears and the machine stops. Phase order incorrect. Check phase direction and correct. Alarm

MDFD

Fire protection

 If the fire protection is triggered an alarm appears and the machine stops.
  1. Regeneration blower is not running.
  2. See alarm: Regeneration time is too long.
  1. Check if the regeneration blower is running.
  2. Check if the regeneration breaker is OK and the relay is active.
  3. Check if the contactor is jammed.
  4. Reset the fire safety alarm by turning it on and off the machine.
 Alarm

MDFD

Sensor return air - cooler

 If there is an attached return air cooler, there is a max return air temperature setpoint, and if the temperature goes above that, a warning appears.
  1. Broken wire / Sensor.
  2. Short Circuit.
  3. Not correct connected.
  1. Check wire / Sensor, maybe exchange sensor.
  2. Check electrical diagrams.
 Alarm

MDFD

Sensor process air - cooler

 If there is an attached forward air cooler, there is a max forward air temperature setpoint, and if the temperature goes above that, an alarm appears and stops the dry air motor.
  1. Broken wire / Sensor.
  2. Short Circuit.
  3. Not correct connected.
  1. Check wire / Sensor, maybe exchange sensor.
  2. Check electrical diagrams.
 Alarm

MDFD

Regeneration air motor alarm

 Regeneration air motor relay disconnected
  1. Overconsumption.
  2. Blocked filters.
  1. Reset motor protection and adjust current setpoint.
  2. Cleanse filters and reset motor protection.
 Alarm

MDFD

Forward air motor alarm

 Forward air motor relay disconnected.
  1. Overconsumption.
  2. Blocked filters.
  1. Reset motor protection and check current setpoint.
  2. Cleanse filters and reset motor protection.
 Alarm

MDFD

Filter Alarm

 If the pressure on each side of the filter is different, a warning appears indicating the filter is blocked.
  1. Return air filter is blocked.
  2. Return air filter has been in production for more than 6 months.
  1. Clean Return air filter.
  2. Replace Return air filter.
 Alarm

 

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