Specifications

Passive Alarms
If the amber Acknowledge Alarm LED is blinking, the alarm is a passive alarm.
The dryer continues to operate, but this problem could prevent correct drying of
your material. Note that once the Acknowledge Alarm button is pressed once, the
blinking amber LED becomes solid.
Problem
Drying Monitor
Temperature Not Met
(DM Temp Not Met) - Upon
start-up or a change in set-
point, if the temperature at the
RTD selected in Screen B
does not reach or exceed the
Low Temperature Alarm
Setpoint in Screen C in the
time value in the Drying
Monitor Not Met Screen I,
(Default 4 hours) this alarm
will occur.
Possible cause
Selected the wrong RTD for the Low
Alarm Select. It may be in the air and
not in the material.
On central dryers with HTC, the process
setpoint of the HTC control and drying
setpoint of DM-II may not be the same.
Material level in hopper is below the
selected Low Temperature Alarm RTD.
Process air is not at the proper drying
temperature.
Poor airflow to the hopper.
Solution
Reselect the RTD. See “Selecting the
Low Temperature RTD,” in this appen-
dix.
Determine which setpoint is incorrect
and adjust as needed. See “Setting the
Process Temperature on a Central
Dryer,” in this appendix
Check your material supply system for
loader problems, material availability,
etc.
On Central dryers with HTC, ensure the
HTC control has been turned on. Check
for process deviation or loop break
alarms on the dryer or HTC control, and
take the necessary steps to correct these
alarms.
Clean or replace process filter, dust col-
lector, etc. in the process airstream.
Verify the blower is operating properly,
including correct rotation.
Straighten crimps or remove any objects
that may restrict airflow through hoses
and tubes.
Connect any loose hoses. Replace any
damaged hoses.
AA-32 l Appendix