6-12 l Troubleshoot ing
Alarms
• Shutdown (A#): The dryer has automatically shut down because it has detect-
ed a serious problem that could damage your material or dryer.
• Passive (P#): 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.
Problem
A55 & P31 - Wheel Rotation
Failure - The regeneration
temperature differential has
been reached.
A56 & P32 - Regeneration
Outlet RTD Integrity - The
control can not sense the
regeneration outlet RTD.
Possible cause
The wheel motor is not turning.
The belt tensioner is loose or the belt is
slipping.
The regeneration heater is not working.
There is a loose connection in the
wiring leading to the RTD.
The connection of the RTD plug on the
control board is loose.
The regeneration outlet RTD has
failed.
The control board has failed.
Solution
Check the motor, plugs, and fuses.
Change or adjust the tensioner spring or
replace the belt.
Check the heater fuses and heater.
Check the RTD plug connections,
make necessary repairs.
Check the plug connection and tighten
if needed.
Replace the regeneration outlet RTD.
Replace the control board.
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