Troubleshooting l 6-17
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.
6
Troubleshooting
Problem
A53 - Process Blower
Overload - If the process
blower exceeds its full load
amp rating or the overload
has tripped due to a mechani-
cal or electrical problem the
dryer will shut down.
Possible cause
The process blower current draw has
exceeded the full load amps rating of
the motor.
The process blower has mechanically
failed or is unable to rotate freely.
The process blower has failed electri-
cally.
Loss of phase of power to the motor
starter.
The overload is set incorrectly.
Overload is defective.
Solution
Press alarm acknowledge and allow
overload to automatically reset, then
try to restart the dry. If the alarm con-
dition occurs again have a qualified
electrician check the current draw to
the motor.
Disconnect and lock out main power.
Check the process blower for mechani-
cal failure and free rotation. Replace if
necessary. Allow overload to automati-
cally reset, then try to restart the dryer.
Disconnect and lock out main power.
Check the process blower for electrical
shorts or open circuits. Replace if nec-
essary. Allow overload to automatical-
ly reset, then try to restart the dryer.
Check for a blown fuse in the dryer or
main power supply. Allow overload to
automatically reset, then try to restart
the dryer.
Disconnect and lock out main power.
Check the overload settings and con-
firm that the settings match the full
load amps listed on the process blower
motor. Allow overload to automatical-
ly reset, then try to restart the dryer.
Replace the overload.
NOTE: Once the overload
has tripped you must wait
2 - 15 minutes with
power on for it to reset
automatically.
✐
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