Maguire Products VBD-150 Installation Operation & Maintenance page 67

VBD® - Vacuum Dryer®
*** ALARM:20 ***
THROUGHPUT
Press Any Button
To SILENCE alarm
*** ALARM:21 ***
LOW VACUUM
Press Any Button
To SILENCE alarm
*** ALARM:23 ***
RESIDENCE ALARM
Press Any Button
To SILENCE alarm
*** ALARM:24 ***
BATCH COMPLETE
Press Any Button
To SILENCE alarm
*** ALARM:25 ***
MATERIAL SHUTDOWN
Press Any Button
To SILENCE alarm
*** ALARM:26 ***
MATERIAL READY
Press Any Button
To SILENCE alarm
Problem: The throughput of the dryer has been exceeded.
This is an optional alarm (under alarms menu), defaulted to enabled. This
alarm is triggered when the Retention Hopper low level has been reached
before the vacuum timer has elapsed. This means demand for material
has exceeded dried material supplied. This alarm is non-fatal, dryer
continues to run.
Solution: This is cause by exceeding material demand.
Problem: Dryer failed to pull vacuum down to target
vacuum pressure set in VPL parameter.
Dryer attempted to pull a vacuum down to target vacuum pressure within
120 seconds (default value in LVT parameter).
Possible causes and Solution: If dryer alarms, check: compressed air
connection and pressure (dryer's regulator should be reading 85psi).
Check for debris in seals above and below Vacuum Chamber. Alarm may
also have been caused by a vacuum leak. Contact Maguire technical
support if cause is not found.
Problem: Material has been in the retention hopper too
long.
This alarm is triggered by the RAL parameter. When the Residence Alarm
has been enabled, this alarm will sound if not enough material has been
removed from the retention hopper in the time specified in the RAL
parameter. For more information, see the RAL parameter on page 32.
Solution:
To prevent this alarm: decrease fill weight, or turn on Fill Weight Adjust
(Material Setup menu).
Batch is complete
This alarm triggers at the end of a batch run, the end being defined as the
time at which the retention hopper is depleted to the HHL parameter level
after the final vacuum chamber dump of said batch run.
Material Shutdown
This alarm triggers if the Material Shortage alarm is set to "SHUTDOWN"
and is it determined that the heating hopper has been fully depleted of
material via the VFA parameter criteria. When this alarm triggers, the VBD
enters a Shutdown state automatically. This alarm can be useful. For
example: at the end of the day, one can intentionally run the heating
hopper empty (by turning off its feed loader) and have the VBD
automatically initiate a shut down at the appropriate time.
Material Ready
If the Material Ready alarm is enabled under the "Alarm Setup" menu, this
alarm will trigger after the first and only first batch of material has
completed a full vacuum cycle. After 15 seconds, the audible portion of this
alarm will automatically silence. The first batch of material will remain
under vacuum indefinitely until this alarm is cleared. There are two main
purposes of this alarm:
1. To alert the operator that dry material is ready for the process.
2. To act as a hold-back, when necessary, giving the operator additional
time to prepare the process.
Rev. August 31, 2016 – VBD-150
Maguire Products, Inc.
67