Filter
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Alarm Message Cause Corrective Action Dryer Status
Make sure the process air
filter is clean. Clean or
replace if necessary.
Check the rotation of the
blower.
The process blower
pressure switch did not
detect enough
pressure.
Process blower
overload has tripped.
Check the pressure switch
hose connection. Replace
hoses or the pressure
switch.
Process blower motor
has failed.
Check the over load rating
against the wiring diagram.
Adjust accordingly.
Check the wiring of the
blower. Make sure it is wired
for the proper voltage.
Check the process blower
fuses for any fault. Replace
if necessary.
Check the blower motor
starter. Replace if
necessary.
Check the blower motor.
Replace if necessary.
PROCESS
BLOWER FAIL
Check the incoming voltage
against the name plate of
the dryer.
- Dryer Shuts Down :
- Process blower OFF.
- Process heaters OFF.
- Regen heaters OFF.
- Alarm Message ON.
- Alarm horn is ON.
Check the heater fuses,
replace if necessary.
Make sure the wiring is
correct and wire connections
are tight.
PROCESS
HEATER FAIL
The process heater
safety contactor is not
responding.
Check the process heater
safety contactor. Replace if
necessary.
- Dryer Shuts Down :
- Process blower OFF.
- Process heaters OFF.
- Regen heaters OFF.
- Alarm Message ON.
- Alarm horn is ON.
Make sure the process air
filter is clean. Clean or
replace if necessary
Make sure the filter housing
is installed correctly, and the
connections are tight.
Check the hoses to the filter
pressure differential switch is
connected correctly, are not
damaged, and all the
connections are tight.
Replace the hoses if
necessary.
DIRTY FILTER
The filter pressure
differential switch has
tripped.
Check the wiring
connections to filter pressure
differential switch against the
print. Tighten the
connections.
- Dryer Normal :
- Process blower ON.
- Process heaters ON.
- Regen heaters ON.
- Alarm Message ON.
- Alarm horn is OFF.
Portable Drying/Conveying Systems Chapter 6: Troubleshooting 52 of 63