User guide

6
Troubleshooting
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.
Problem
A4 - Regeneration Heater
High Temperature – The
snap switch in the regeneration
heater tube activated due to
excessive temperature.
Possible cause
The regeneration exhaust is blocked or the
air hoses are loose.
The regeneration blower is not running or
running in the wrong direction.
The isolation contactor failed in the
closed position.
The heater solid state relays (SSRs) failed.
The regeneration heater output on the
board has failed.
Solution
Locate and remove any airflow restric-
tions.
Tighten any loose hoses.
Correct the cause of the non-running
blower or reverse the rotation of the
blower.
Replace the isolation contactor.
Replace the failed heater solid state
relays (SSRs).
Replace the board.
NOTE: Shutdown alarms
will cause the dryer to go
through the normal shut
down procedure to cool
the heaters, then it will
stop running.
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