6-6 l Tro ub le sh oo ti ng
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 airflow blockage or loose
hoses.
The process blower is not running or
running 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 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
restrictions.
Tighten any loose hoses.
Correct the cause of the non-running
blower (blown fuse, etc.) or reverse the
rotation of the blower. See Installation
section entitled, Checking for proper air
flow.
Replace the isolation contactor.
Replace the board.
Replace the failed heater solid state
relays (SSRs).
Locate and remove any airflow
restrictions.
Tighten any loose hoses.
Correct the cause of the non-running
blower (blown fuse, etc.) or reverse the
rotation of the blower. See Installation
section entitled, Checking for proper air
flow.
Replace the isolation contactor.
Replace the failed heater solid state
relays (SSRs).
Replace the board.
When supplied for central
drying applications, these
shutdown alarms are not
available.
Shutdown Alarms
If the red Acknowledge Alarm LED is blinking, the alarm is a shutdown
alarm. The dryer will shut down 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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