6-6 l Troub les ho ot in g
Problem
Process Heater High
Temperature – The snap
switch in the process heater
tube opens due to excessive
temperature.
Regeneration Heater High
Temperature – The snap
switch in the regeneration
heater tube activated due to
excessive temperature.
Possible cause
There is an air flow blockage or loose
hoses.
The process blower is not running or run-
ning in the wrong direction.
The isolation contactor failed in the
closed position.
The process heater output on the board
has failed.
The heater solid state relays (SSRs) failed.
The regeneration exhaust is blocked or the
air hoses are loose.
The regeneration blower is not running.
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 (blown fuse, etc.) or reverse the
rotation of the blower.
Replace the isolation contactor.
Replace the board.
Replace the failed heater solid state
relays (SSRs).
Locate and remove any airflow restric-
tions.
Tighten any loose hoses.
Correct the cause of the non-running
blower (blown fuse, etc.) or reverse the
rotation of the blower.
Replace the isolation contactor.
Replace the failed heater solid state
relays (SSRs).
Replace the board.
Shutdown Alarms
If the red Acknowledge Alarm LED is blinking red, the alarm is a shutdown
alarm. The dryer will shutdown automatically to prevent damage to the
equipment or personnel. Note that when the Acknowledge Alarm button is
pressed once, the blinking red LED becomes solid.
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