How to Identify the Cause of a
Problem
Dryer alarms are indicated by an illuminated Acknowledge Alarm light on the W
Series Dryer control panel. Shutdown alarms will energize optional audible and
visual alarm indicators.
A problem can trigger two types of alarms:
• Shutdown: The dryer has automatically shut down because it detected a
serious problem that could damage your material or dryer.
• Passive: 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.
When the alarm light is displayed:
1 Press the Acknowledge Alarm button once to silence the
optional audible alarm and display the alarm message. Pressing the
Acknowledge Alarm button once also changes the alarm LED from blinking to
solid.
2 Find the error message in the diagnostics table of this Troubleshooting
section. Use information provided to diagnose and resolve the cause of the
alarm.
3 Note that, after correcting the problem, pressing the Acknowledge Alarm
button a second time will clear the alarm. If the alarm reappears,
the cause has not been resolved.
NOTE: When the dryer detects abnormally high temperature in the process heater, the
dryer immediately shuts down and an error message appears in the display window.
Shutdown Alarms
A1 Process High Temp
A2 Process Loop Break
A3 Process Heater High Temp
A4 Regen Heater High Temp
A7 Return Air High Temp
A49 Process Protection High Temp
A53 Process Blower Overload
A55 Wheel Rotation Failure
Passive Alarms
P1 Process Temp Deviation
P3 Regen Temp Deviation
P5 Return Air Mid High Temp
P17 MDC Conveying Demand
1 Process Temp.
2 Regen. Temp.
3 Return Air Temp.
4 Auto Start
5 Load Time (MDC)
6 Activate Setback Temp.
7 Setback Temp.(Process)
8 Dewpoint
Auto Start
Dewpoint Control
Set-Back Temp.
Regen. Blower
Regen. Heater
Conveying Blower
Process Blower
Process Heater
Acknowledge
Alarm LED and
Button
✐
6-4 l Troubleshooting
NOTE: Pushing the
Acknowledge Alarm button
when there is no active alarm
will display the most recent
alarm code.
✐
NOTE: The dryer cannot be
started if a passive alarm is
present on power-up.
✐
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