Specifications

Portable Drying/Conveying Systems Chapter 6: Troubleshooting 63 of 76
Alarm Message Cause Corrective Action Dryer Status
Check the pressure setting of
the filter pressure differential
switch against the print. Adjust
accordingly.
DIRTY FILTER
The filter pressure
differential switch
has tripped.
Check the filter pressure
differential switch to make sure
it is functioning. Replace is
necessary.
- Dryer Normal :
- Process blower ON.
- Process heaters ON.
- Regen heaters ON.
- Alarm Message ON.
- Alarm horn is OFF.
VALVE MOTOR
FAIL
The limit switch on
the valve may not
have been wired
correctly.
The switch is indicating the
incorrect desiccant tank is in
regeneration. Check the wiring
of the switch against the wiring
diagram. Make sure all the
wire connections are tight.
- Dryer Shuts Down :
- Process blower OFF.
- Process heaters OFF.
- Regen heaters OFF.
- Alarm Message ON.
- Alarm horn is ON.
The return air temperature
thermocouple is not connected
to the temperature controller.
Make sure the connections are
correct and tight.
P RETURN
SENSOR FAIL
The return air
temperature
thermocouple is
open or failed.
The return air temperature
thermocouple is damaged.
Replace the thermocouple.
- Dryer Normal :
- Process blower ON.
- Process heaters ON.
- Regen heaters ON.
- Alarm Message ON.
- Alarm horn is OFF.
Make sure the process air filter
is clean. Clean or replace if
necessary.
Make sure all the hose
connections are tight.
The process heater contactor
has failed in the closed
position. Check heater
contactor, replace if
necessary.
PROCESS
TEMP SAFETY
The high
temperature snap
switch of the process
heater box has
tripped.
Check the high temperature
snap switch, 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 all the hose
connections are tight.
The Regeneration heater
contactor has failed in the
closed position. Check heater
contactor, replace if
necessary.
REGEN TEMP
SAFETY
The high
temperature snap
switch on of the
regeneration heater
boxes has tripped
Check the high temperature
snap switches, replace if
necessary.
- Dryer Shuts Down :
- Process blower OFF.
- Process heaters OFF.
- Regen heaters OFF.
- Alarm Message ON.
- Alarm horn is ON.