User guide

Troubleshooting l 6-5
Alarms
A problem can trigger two types of alarms:
• Shutdown (A#): If the red Acknowledge Alarm LED is blinking, the alarm is a
shutdown alarm. The dryer has automatically shut down because it has detected a
serious problem that could damage your material or dryer. Note that once the
Acknowledge Alarm button is pressed once, the blinking red LED becomes solid.
• Passive (P#): If the amber Acknowledge Alarm LED is blinking, the alarm is a
passive alarm. The dryer continues to operate, but warns of a problem that could
prevent correct drying of your material. If ignored, this problem could lead to a
condition that will shut down the dryer. Note that once the Acknowledge Alarm
button is pressed once, the blinking amber LED becomes solid.
When supplied for central
drying applications, these
shutdown alarms are not
available.
Problem
A1 - Process High
Temperature – If the process
temperature exceeds the
process high temperature set-
point, it shuts down the dryer.
Defaults are set to 385°F
{196°C} for 20 seconds.
Possible cause
The process high temperature setpoint is
not at least 10°F {6°C} above the drying
setpoint.
One of the process solid state relays has
failed.
The air lines are restricted or loose.
The process setpoint is too low.
The process heater output on the control
board has failed.
Solution
Reset the process high temperature set-
point at least 10°F {6°C} above the dry-
ing setpoint.
Replace the solid state relay.
Straighten any crimps in the hoses.
Tighten any loose hoses.
Set the process setpoint higher or install
an optional precooler.
Replace the control board.
6
Troubleshooting