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Po o r M a t e r i a l D r y i n g
Tr o u b l e s h o o t i n g ( c o n t i n u e d )
Once it is determined which of the four requirements that is not being satisfied,
refer to the following list and possible causes and solutions.
Temperature - The temperature of the air entering the hopper must be at the proper drying temperature for your material, as specified by your supplier.
Problem
Possible cause
Solution
The temperature of the air
entering the hopper is not
at proper drying temperature.
Incorrect setpoint
Refer to the drying specifications for
your material and adjust the setpoint to
the recommended setpoint.
If your dryer has the Setback option,
make sure it is not active unless you
have specifically activated it. If necessary, refer to the Operation section of
this manual for assistance in using the
Setback function.
Not able to achieve setpoint.
Replace any defective process heater,
contactors, fuses, etc.
Ensure the selected drying temperature
is within the design specifications of
your dryer.
Inaccurate process temperature readout.
Ensure the Process RTD is properly
positioned in the air stream.
Determine if there is a problem in the
temperature control circuit and repair or
replace any defective components such
as RTD, temperature control, circuit
boards, etc.
6 - 2 4 l Tr o u b l e s h o o t i n g