Maguire Products VBD-1000, Установка, эксплуатация и обслуживание

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Maguire Products, Inc.
Rev. March 5, 2018 – VBD-1000 Touchscreen
63
VBD

- Vacuum Dryer

NO VACUUM
ALARM:08
Problem: The dryer failed to pull a vacuum after three
attempts.
Dryer attempted to pull a vacuum 200mm below atmosphere within 45
seconds (default). Dryer attempted three times (number of default
retries). After each attempt vacuum was equalized and vacuum gates
were opened and closed in an attempt to reseal the Vacuum Chamber
(possible debris or pellets preventing adequate seal). Defaults are
controlled the NVT parameter (retries and seconds). This alarm is non-
fatal. Dryer will continue to reseal after alarming.
Solution: If Dryer continues to alarm, check: compressed air
connection and pressure (dryer’s regulator should be reading 85psi).
Check for debris in seals above and below Vacuum Chamber.
RETEN.NOT PRESENT
ALARM:09
Problem: The Retention Hopper is missing.
If retention hopper loadcell (pair) is reading 23.2 pounds (10000 grams)
below tare during AUTO run, this alarm is triggered and Dryer stops
(fatal). This alarm is generally caused by a missing Retention Hopper
but may also be caused by dryer Retention Hopper load cells having
been zero calibrated while material was in the Retention Hopper, or
faulty loadcells.
Solution: If Retention Hopper is missing replace Retention Hopper. If
Retention Hopper is in place, ensure the tank is empty and zero
calibrate the load cells. If load cells are damaged, a zero calibration
may detect this.
RTD FAILURE
ALARM:11
Problem: RTD (temperature sensor) reading is above or
below max/min reading
RTD Sensor is probably disconnected or damaged. Check temperature
display reading in a cool state. Temperature should display room
temperature. If reading is below -25C or above 450C RTD sensor has
failed.
Solution: Contact Maguire Technical Support for a replacement RTD
Sensor.
MATERIAL SHORTAGE
ALARM:12
Problem: Maximum Fill Time (VFT parameter) has been
reached before target material weight (VTH parameter)
has been achieved.
This alarm is triggered when the VFT parameter has been reached
(Vessel Fill Time) before the VTH (Vacuum Chamber High level),
indicating shortage of material in heating hopper or possible valve jam.
The outcome of this alarm is controlled by the Material Shortage Alarm
settings.
Solution: Check material supply. Check Vacuum Chamber fill valve
located at the base of the heating hopper.
LOW AIR PRESSURE
ALARM:15
Problem: Air pressure sensor has detected air pressure
below 50 psi.
Solution: Check exhausting lockout valve located on the front lower left
side of VBD-1000. Ensure that the valve is open. Check pressure of air
supply.