6
Troubleshooting
Troublesho oti ng l 6-17
Problem
Conveying Blower Overload
(cont.) – The conveying blower
overload has tripped due to a
mechanical or electrical
problem.
Setback RTD Integrity - The
control can not sense the
setback RTD.
Wheel Rotation Failure - The
regeneration temperature differ-
ential has been reached.
Regeneration Outlet RTD
Integrity - The control can not
sense the regeneration outlet
RTD.
Possible cause
The conveying blower current draw has
exceeded the full load amps of the
motor.
The overload is defective.
The connection in the electrical enclo-
sure for the hopper RTD is loose.
The connection of the RTD plug on the
control board is loose.
The setback RTD has failed.
The control board has failed.
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
Allow overload to reset, then try to start
the conveying blower. If the alarm con-
dition occurs again, have a qualified
electrician check the current draw to the
motor.
Replace the overload.
Check the RTD plug connection and
tighten if needed.
Check the plug connection and tighten if
needed.
Replace the setback RTD.
Replace the control board.
Check the motor, plugs, and fuses.
Change the tensioner spring or replace
the belt.
Check the heater fuses and heater.
Check the RTD plug connections and
make necessary repairs.
Check the plug connection and tighten
if needed.
Replace the regeneration outlet RTD.
Replace the control board.
Passive Alarms
If the amber Acknowledge Alarm LED is blinking, the alarm is a passive alarm.
The dryer continues to operate, but this problem could prevent correct drying of
your material. Note that when the Acknowledge Alarm button is pressed once, the
blinking amber LED becomes solid.
NOTE: Passive alarms can be configured as shutdown alarms (see the previous Shutdown Alarms
section). See page 4-26, screen 62 for instructions.
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