NWDC
IM 26 MAR 2014 © 2014 Novatec, Inc. All Rights Reserved
Page 37
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NWDC IM 26 MAR 2014
12 TROUBLE SHOOTING and ERROR MESSAGES
TROUBLE
PROBABLE REASON
CORRECTIVE ACTION
1. Unit not running
Control main circuit
breaker tripped.
Main power off.
Control power
interrupted.
Reset the breaker.
Check line and main.
Check per item as per electrical wiring
diagram.
2. Material in hopper
melts.
Process temperature
controller set too high for
material being
dried.
Temperature probe not
installed in process air
stream.
Process blower rotating
in wrong direction.
Temperature sensor
connection loose or
reversed.
Check set temperature for proper drying
process temperature.
Ensure temperature probe is installed in
the dryer outlet, or in the hopper inlet.
Change blower rotation.
Correct the connection.
3. Reactivation
(regeneration)
temperature too high.
Reactivation temperature
set too High.
Check set-temperature on NWDC
controller. it should be 380°F (190°C)
4. Reactivation
(regeneration) heat too
low (Rotor not fully
reactivating.)
Reactivation thermostat
setting too low
Reactivation temperature
controller set too Low
Reactivation heaters
faulty.
Adjust thermostat for proper reactivation
heat at around 380° F (190°C)
Check set temperature on NWDC
microprocessor controller. it should be
380° F. (190°C)
Replace heaters.
